From owner-xj-digest-at-digest.net Sun Jan 29 18:17:15 2006 From: xj-digest xj-digest Monday, January 30 2006 Volume 01 : Number 2268 Forum for Discussion of XJ cherokees and wagoneers Brian Colucci Digest Coordinator Contents: xj: Re: Saturday in Snohomish RE: xj: Failed slave cylinder - what else to replace? Re: xj: Re: Saturday in Snohomish xj: Re: Thermostatic air cleaner Re: xj: Re: Thermostatic air cleaner xj: alittle off topic need a ZJ 2" reciever hitch. XJ Digest Home Page: http://www.digest.net/jeep/xj/ Send submissions to xj-digest-at-digest.net Send administrative requests to xj-digest-request-at-digest.net To unsubscribe, include the word unsubscribe by itself in the body of the message, unless you are sending the request from a different address than the one that appears on the list. Include the word help in a message to xj-digest-request to get a list of other majordomo commands. ---------------------------------------------------------------------- Date: Sun, 29 Jan 2006 09:55:40 -0700 From: "Aaron Storms" Subject: xj: Re: Saturday in Snohomish Very nice John - going with a tan interior and accessories? Aaron > spent all day working on the fleet... > > prepped the white '99 WJ for sale, cleaned everything out of it. > set up the silver '99 WJ for my wife. > put my tools back in the '91 300D. > next in line is to part the '87 xj (will need help to pull the > engine/axles) > > got the starter back in the CJ-2A, turned out it was bad cables, replaced > them and it started right up... moved it back into it's shed so I could > work on the other rigs... having some challenges with the windshield... > :) > > pictures: http://wagoneers.com/Willys/48-CJ-2A/28Jan06-operational/ ------------------------------ Date: Sun, 29 Jan 2006 12:05:36 -0700 From: Donna&Joe Subject: RE: xj: Failed slave cylinder - what else to replace? It'd definitely an internal unit. I ordered a factory clutch disc along with the master/slave cylinder kit, and I guess I'll take a close look at the pressure plate once I get things apart. The pilot bearing is only a $10 part, so I'll pick that up at NAPA. The FSM says to use new U-joint straps when I re-install the driveshafts; is that overly conservative, or should I do that and slap in new U-joints, too? Jim, I'd read on the NAXJA board about doing that conversion, but there are no nearby junkyards to get the right donor parts, and I hope this is the only time I'll ever need to do this job (knocking on wood while I type...). Well, I'm back from church, and will be spending the rest of my Sunday under the Jeep. Makes me wish I had in-floor heat in the garage! Thanks for the advice, - - Joe Richardson >I thought on a '92 the slave cylinder was external so with just two bolts and >the hydraulic line you can have the slave out. If it is the internal slave >then I would highly recommend replacing the clutch, pressure plate, pilot >bearing/bushing, and have the pressure plate resurfaced. It is a lot of >work to >drop the tranny and t-case so you might as well do the clutch while you >are in >there especially if it has 145K on it, even if it has less miles. As for the >rear main, it would be a good time to replace the seal if it is leaking since >you most of the way there. >Good luck ------------------------------ Date: Sun, 29 Jan 2006 13:56:58 -0800 (PST) From: john Subject: Re: xj: Re: Saturday in Snohomish On Sun, 29 Jan 2006, Aaron Storms wrote: > -->Very nice John - going with a tan interior and accessories? Aaron black and white, with the tan seats... black top... black trim... seats just happen to be the color they are and in good shape. :) john > --> > --> > --> > -->> spent all day working on the fleet... > -->> > -->> prepped the white '99 WJ for sale, cleaned everything out of it. > -->> set up the silver '99 WJ for my wife. > -->> put my tools back in the '91 300D. > -->> next in line is to part the '87 xj (will need help to pull the > -->> engine/axles) > -->> > -->> got the starter back in the CJ-2A, turned out it was bad cables, > -->> replaced > -->> them and it started right up... moved it back into it's shed so I could > -->> work on the other rigs... having some challenges with the > -->> windshield... > -->> :) > -->> > -->> pictures: http://wagoneers.com/Willys/48-CJ-2A/28Jan06-operational/ > --> > --> ---- - ------------------------------------------------------------------------- ** http://JohnMeister.com **** http://wagoneers.com ** Snohomish, Washington USA - where Jeeps don't rust, they mold ** http://freegift.net *** http://greatcom.org/laws/languages.html ** - ------------------------------------------------------------------------- ------------------------------ Date: Sun, 29 Jan 2006 16:53:03 -0800 (PST) From: john Subject: xj: Re: Thermostatic air cleaner On Sun, 29 Jan 2006, D S wrote: > -->Hey John, here's a good one for ya'... > -->What does TAC TV5 do? (you can see it on the air cleaner, at about 11 > -->o'clock... > -->Dan you know those flapper valves on air cleaners? it's a rube-goldberg solution to helping a carb'd engine get warmed up... this is what opens them up to outside air when they get to temperature... john TAC An acronym for thermostatically controlled air cleaner TAC-AD Thermactor air cleaner-air diverter TAC-BMS Thermactor air cleaner-bi-metallic sensor TAC-CV Thermactor air cleaner-check valve TAC-DV Thermactor air cleaner-delay valve TAC-PVC Thermactor air cleaner-ported vacuum switch TAC-RDV Thermactor air cleaner-reverse delay valve TAC-RDVS Thermactor air cleaner-reverse delay valve single TAC-TCV Thermactor air cleaner-thermal control valve TAC-TS Thermactor air cleaner-temperature sensor TAC-TSOV Thermactor air cleaner-temperature sensor override valve TAC-TV Thermactor air cleaner-thermal vacuum valve TAC-TVS Thermactor air cleaner-thermal vacuum switch TAC-VCDV Thermactor air cleaner-vacuum control delay valve TAC-VCV Thermactor air cleaner-vacuum control valve TAC-VM Thermactor air cleaner-vacuum motor ---- - ------------------------------------------------------------------------- ** http://JohnMeister.com **** http://wagoneers.com ** Snohomish, Washington USA - where Jeeps don't rust, they mold ** http://freegift.net *** http://greatcom.org/laws/languages.html ** - ------------------------------------------------------------------------- ------------------------------ Date: Sun, 29 Jan 2006 16:56:02 -0800 (PST) From: john Subject: Re: xj: Re: Thermostatic air cleaner Here's some more smog info... found at: http://www.mirafiori.com/smog/specfiat.html # AIS- Air Injection System- Air Injection defines a system that introduces fresh air to the exhaust stream. This has been used in many ways, but the primary reason is to help raise the exhaust temperatures, promoting continued combustion of the exhaust gases as they leave the system. Air can be introduced either by way of a belt-driven air pump, or by the natural vacuum that occurs when hot, moving exhaust gases pass an open port. The latter style is usually called reed valve or Pulse Air Injection. In early cars, a thermactor system was used- This basically allowed the hot (partially unburned) gases leaving the exhaust valves a fresh shot of air, causing them to 're- burn' as they left the manifold. Heat was again a primary function in later cars using catalysts, as the catalyst needs to reach operating temperature before it an do its job (see Catalyst), and the fresh shot of oxygen also helps the chemical reaction inside the catalyst. An important note: Most air pumps use less than .5HP at peak load- the plumbing associated with these systems can be a headache, but the actual performance losses are minimal. Indeed, some long-term Fiat mechanics tout the air injection, saying it keeps the exhaust valves cooler, prolonging the life of the engine. Make your own judgment. # Breather- The breather system seals crankcase blow-by gases and routes them to the intake for combustion. Most cars use a vacuum operated PCV system to accomplish this- Fiat, and some other European cars were the last to use a passive breather system in their US-bound cars. # CA- California certified car. These days, most cars are built to 50-State specification, because most states have stringent emission control regulations. In the past, some manufacturers had specific models built to pass regulations for sale in California, because CA regulations were so much more stringent at the time. Cars not built to California spec. were called Federal, or 49-State cars. This was done primarily to save money in those US states where extensive emissions control equipment was not required. # Catalyst- An exhaust device that uses a chemical reaction to reduce harmful exhaust emissions. See OC. # Charcoal Canister- See EVAP # Check Valve- A one-way valve, usually found in Air Injection systems. # CO- Carbon Monoxide- Odorless, colorless and toxic, this gas is a major byproduct of combustion. # EGR- Exhaust Gas Recirculation- EGR is a system whereby a small amount of exhaust gas is redirected to the intake stream, under certain load and temperature conditions. This is not done to reburn the gas (as is widely thought), but to lower overall combustion temperatures. Lower combustion temperatures reduce the amount of NOX produced during the combustion process. # EVAP- Evaporative fuel emission controls- Many systems exist, but the concept is to reduce the amount of raw hydrocarbons that are emitted when an open fuel tank 'perks' as its temperature, and density changes. Most systems use a charcoal vapor canister to trap the vapors when the car is parked, and slowly vent those vapors to the intake when the car is running. # Federal- See CA # HC- Hydrocarbons- Basically the chemical term for unburnt fuel. # NOX- Nitrous Oxides- A byproduct of high-temperature combustion, NOX is produced when Oxygen, and Nitrogen present in the intake stream combine under pressure, and heat. NOX is a major contributor to atmospheric problems associated with smog. # O2 Sensor- Device that converts oxygen content present in the exhaust stream to a voltage signal, usually between 1.0-1.5 volts. This voltage signal is used by the ECM to help determine mixture. O2 sensors need to reach operating temperature before they start to operate, and do wear out over time. Fiats used O2 sensors on the fuel-injected models, see your service manual for test procedures. # O2- Oxygen # OC- Oxidizing Catalyst- The catalytic converter is a device that, under relatively high heat (400 degrees+ F.) utilizes a chemical reaction to convert Oxygen, Hydrocarbons and Carbon Monoxide into water vapor and Carbon Dioxide. The catalyst is filled with a substrate of precious metals, usually platinum and palladium, with the addition of rhodium in some cases- Early catalysts have loose pellets inside them (some of which allow you to change the substrate if you have access to new pellets), but later- style have a honeycomb style 'brick' inside them. Most Fiats here have an early OC- Carbureted cars had the original 3-bolt flange style Cat, and Fuel-Injected cars got the 4-bolt flanged Cat. # PAI- Pulse Air Injection- See AIS # TAC- Thermostatic Air Cleaner - This system directs heated air (usually picked up by a stove on the exhaust manifold) to the induction system to aid in warm-up. Refer to your vacuum diagram. Most cars have a simple thermovalve that inhibits vacuum when cold, allowing a vacuum-operated flapper valve on the cold air side of the air cleaner to shut. When the car warms up, vacuum is allowed to draw the flapper open, allowing fresh cold air to the air cleaner. Some cars, (specifically pre-'79 carbureted Fiats) have a manual climactic setting, allowing you to change the position of the air cleaner with the season. This allows warm air all the time in one position, and cold in the other. # TPS- Throttle Position Sensor- Sends information (usually a resistance figure through a potentiometer) to the ECM regarding throttle plate opening. Fiat application only on the Injected cars. # TVS- Thermal Vacuum Switch- A favorite of Fiat, this device either closes off or allows the flow of vacuum based on coolant temperature. Most often used in spark control or EGR vacuum circuits, they go bad often. # Vacuum Advance- Controls ignition timing based on manifold (or ported) vacuum. # Vacuum, Manifold- Vacuum source in manifold below throttle plate. # Vacuum, Ported- Vacuum source in carburetor above throttle plate. >-->On Sun, 29 Jan 2006, D S wrote: >-->> -->Hey John, here's a good one for ya'... >-->> -->What does TAC TV5 do? (you can see it on the air cleaner, at about 11 >-->> -->o'clock... >-->> -->Dan >-->you know those flapper valves on air cleaners? >-->it's a rube-goldberg solution to helping a carb'd engine get warmed >-->up... this is what opens them up to outside air when they get to temperature... >-->john >--> >--> >-->TAC An acronym for thermostatically controlled air cleaner >-->TAC-AD Thermactor air cleaner-air diverter >-->TAC-BMS Thermactor air cleaner-bi-metallic sensor >-->TAC-CV Thermactor air cleaner-check valve >-->TAC-DV Thermactor air cleaner-delay valve >-->TAC-PVC Thermactor air cleaner-ported vacuum switch >-->TAC-RDV Thermactor air cleaner-reverse delay valve >-->TAC-RDVS Thermactor air cleaner-reverse delay valve single >-->TAC-TCV Thermactor air cleaner-thermal control valve >-->TAC-TS Thermactor air cleaner-temperature sensor >-->TAC-TSOV Thermactor air cleaner-temperature sensor override valve >-->TAC-TV Thermactor air cleaner-thermal vacuum valve >-->TAC-TVS Thermactor air cleaner-thermal vacuum switch >-->TAC-VCDV Thermactor air cleaner-vacuum control delay valve >-->TAC-VCV Thermactor air cleaner-vacuum control valve >-->TAC-VM Thermactor air cleaner-vacuum motor ---- - ------------------------------------------------------------------------- ** http://JohnMeister.com **** http://wagoneers.com ** Snohomish, Washington USA - where Jeeps don't rust, they mold ** http://freegift.net *** http://greatcom.org/laws/languages.html ** - ------------------------------------------------------------------------- ------------------------------ Date: Sun, 29 Jan 2006 19:55:40 -0600 From: "Allen Zylstra" Subject: xj: alittle off topic need a ZJ 2" reciever hitch. Hey guys, I need a 2" reciever hitch for my ZJ. I am getting ready for a 3000 mile trip to MN and back and I need a hitch to slide my hitch haul into. Anyone have a used one that they will part with? Need it by the end 18th of February. Allen -------------------------------------------------------------------- From: john Reply-To: xj-at-digest.net To: xj-list CC: D S , full size jeep list Subject: Re: xj: Re: Thermostatic air cleaner Date: Sun, 29 Jan 2006 16:56:02 -0800 (PST) >Here's some more smog info... found at: > http://www.mirafiori.com/smog/specfiat.html > ># AIS- Air Injection System- Air Injection defines a system that introduces >fresh air to the exhaust stream. This has been used in many ways, but the >primary reason is to help raise the exhaust temperatures, promoting continued >combustion of the exhaust gases as they leave the system. Air can be >introduced either by way of a belt-driven air pump, or by the natural vacuum >that occurs when hot, moving exhaust gases pass an open port. The latter style >is usually called reed valve or Pulse Air Injection. In early cars, a >thermactor system was used- This basically allowed the hot (partially >unburned) gases leaving the exhaust valves a fresh shot of air, causing them >to 're- burn' as they left the manifold. Heat was again a primary function in >later cars using catalysts, as the catalyst needs to reach operating >temperature before it an do its job (see Catalyst), and the fresh shot of >oxygen also helps the chemical reaction inside the catalyst. An important >note: Most air pumps use less than .5HP at peak load- the plumbing associated >with these systems can be a headache, but the actual performance losses are >minimal. Indeed, some long-term Fiat mechanics tout the air injection, saying >it keeps the exhaust valves cooler, prolonging the life of the engine. Make >your own judgment. ># Breather- The breather system seals crankcase blow-by gases and routes them >to the intake for combustion. Most cars use a vacuum operated PCV system to >accomplish this- Fiat, and some other European cars were the last to use a >passive breather system in their US-bound cars. ># CA- California certified car. These days, most cars are built to 50-State >specification, because most states have stringent emission control >regulations. In the past, some manufacturers had specific models built to pass >regulations for sale in California, because CA regulations were so much more >stringent at the time. Cars not built to California spec. were called Federal, >or 49-State cars. This was done primarily to save money in those US states >where extensive emissions control equipment was not required. ># Catalyst- An exhaust device that uses a chemical reaction to reduce harmful >exhaust emissions. See OC. ># Charcoal Canister- See EVAP ># Check Valve- A one-way valve, usually found in Air Injection systems. ># CO- Carbon Monoxide- Odorless, colorless and toxic, this gas is a major >byproduct of combustion. ># EGR- Exhaust Gas Recirculation- EGR is a system whereby a small amount of >exhaust gas is redirected to the intake stream, under certain load and >temperature conditions. This is not done to reburn the gas (as is widely >thought), but to lower overall combustion temperatures. Lower combustion >temperatures reduce the amount of NOX produced during the combustion process. ># EVAP- Evaporative fuel emission controls- Many systems exist, but the >concept is to reduce the amount of raw hydrocarbons that are emitted when an >open fuel tank 'perks' as its temperature, and density changes. Most systems >use a charcoal vapor canister to trap the vapors when the car is parked, and >slowly vent those vapors to the intake when the car is running. ># Federal- See CA ># HC- Hydrocarbons- Basically the chemical term for unburnt fuel. ># NOX- Nitrous Oxides- A byproduct of high-temperature combustion, NOX is >produced when Oxygen, and Nitrogen present in the intake stream combine under >pressure, and heat. NOX is a major contributor to atmospheric problems >associated with smog. ># O2 Sensor- Device that converts oxygen content present in the exhaust stream >to a voltage signal, usually between 1.0-1.5 volts. This voltage signal is >used by the ECM to help determine mixture. O2 sensors need to reach operating >temperature before they start to operate, and do wear out over time. Fiats >used O2 sensors on the fuel-injected models, see your service manual for test >procedures. ># O2- Oxygen ># OC- Oxidizing Catalyst- The catalytic converter is a device that, under >relatively high heat (400 degrees+ F.) utilizes a chemical reaction to convert >Oxygen, Hydrocarbons and Carbon Monoxide into water vapor and Carbon Dioxide. >The catalyst is filled with a substrate of precious metals, usually platinum >and palladium, with the addition of rhodium in some cases- Early catalysts >have loose pellets inside them (some of which allow you to change the >substrate if you have access to new pellets), but later- style have a >honeycomb style 'brick' inside them. Most Fiats here have an early OC- >Carbureted cars had the original 3-bolt flange style Cat, and Fuel-Injected >cars got the 4-bolt flanged Cat. ># PAI- Pulse Air Injection- See AIS ># TAC- Thermostatic Air Cleaner - This system directs heated air (usually >picked up by a stove on the exhaust manifold) to the induction system to aid >in warm-up. Refer to your vacuum diagram. Most cars have a simple thermovalve >that inhibits vacuum when cold, allowing a vacuum-operated flapper valve on >the cold air side of the air cleaner to shut. When the car warms up, vacuum is >allowed to draw the flapper open, allowing fresh cold air to the air cleaner. >Some cars, (specifically pre-'79 carbureted Fiats) have a manual climactic >setting, allowing you to change the position of the air cleaner with the >season. This allows warm air all the time in one position, and cold in the >other. ># TPS- Throttle Position Sensor- Sends information (usually a resistance >figure through a potentiometer) to the ECM regarding throttle plate opening. >Fiat application only on the Injected cars. ># TVS- Thermal Vacuum Switch- A favorite of Fiat, this device either closes >off or allows the flow of vacuum based on coolant temperature. Most often used >in spark control or EGR vacuum circuits, they go bad often. ># Vacuum Advance- Controls ignition timing based on manifold (or ported) >vacuum. ># Vacuum, Manifold- Vacuum source in manifold below throttle plate. ># Vacuum, Ported- Vacuum source in carburetor above throttle plate. > > > >-->On Sun, 29 Jan 2006, D S wrote: > >-->> -->Hey John, here's a good one for ya'... > >-->> -->What does TAC TV5 do? (you can see it on the air cleaner, at about >11 > >-->> -->o'clock... > >-->> -->Dan > >-->you know those flapper valves on air cleaners? > >-->it's a rube-goldberg solution to helping a carb'd engine get warmed > >-->up... this is what opens them up to outside air when they get to >temperature... > >-->john > >--> > >--> > >-->TAC An acronym for thermostatically controlled air cleaner > >-->TAC-AD Thermactor air cleaner-air diverter > >-->TAC-BMS Thermactor air cleaner-bi-metallic sensor > >-->TAC-CV Thermactor air cleaner-check valve > >-->TAC-DV Thermactor air cleaner-delay valve > >-->TAC-PVC Thermactor air cleaner-ported vacuum switch > >-->TAC-RDV Thermactor air cleaner-reverse delay valve > >-->TAC-RDVS Thermactor air cleaner-reverse delay valve single > >-->TAC-TCV Thermactor air cleaner-thermal control valve > >-->TAC-TS Thermactor air cleaner-temperature sensor > >-->TAC-TSOV Thermactor air cleaner-temperature sensor override valve > >-->TAC-TV Thermactor air cleaner-thermal vacuum valve > >-->TAC-TVS Thermactor air cleaner-thermal vacuum switch > >-->TAC-VCDV Thermactor air cleaner-vacuum control delay valve > >-->TAC-VCV Thermactor air cleaner-vacuum control valve > >-->TAC-VM Thermactor air cleaner-vacuum motor > > ---- > >------------------------------------------------------------------------- > ** http://JohnMeister.com **** http://wagoneers.com ** > Snohomish, Washington USA - where Jeeps don't rust, they mold > ** http://freegift.net *** http://greatcom.org/laws/languages.html ** >------------------------------------------------------------------------- ------------------------------ End of xj-digest V1 #2268 *************************