Interchangeable Parts
From : joe colella
Q: i dont know about hemis but my cummins exhaust has never given me a problem when sunk in water or mud. i have a 2004 durango hemi and a 2004 ram 1500 hemi. when the tailpipe goes under water both vehicles start to blow steam and the engine light comes on. last week just after leaving the engine runnig while i loaded the boat - the valves started knocking really loud and now i have a hefty repair bill to reinstall new valve lifters. does anyone have any ideas why none of my other trucks have ever had this problem. .
Replies:
From : donstaples
well i seriously doubt the repair was caused by water intrusion. i myself have had my vehicle in water at ramps and once even through 3 to 3 1/2 feet of water for 1/4 and no damage at all. granted i was nervous as hell but my ram made it all the way. this is a 2001 2500 4x4 no lift kit...standard height. -- ------------------------------------------ laszlo almasi ----cool toys formerly carolina watercraft works ----mack daddy trailers ----ice angels i have a 2004 durango hemi and a 2004 ram 1500 hemi. when the tailpipe goes under water both vehicles start to blow steam and the engine light comes on. last week just after leaving the engine runnig while i loaded the boat - the valves started knocking really loud and now i have a hefty repair bill to reinstall new valve lifters. does anyone have any ideas why none of my other trucks have ever had this problem. .
From : joe colella
on fri 15 sep 2006 234218 gmt snoman admin@snoman.com wrote on fri 15 sep 2006 224257 gmt denny wddodge@woh.rr.com wrote on 14 sep 2006 104850 -0700 fp@odonnelldrg.com wrote i have a 2004 durango hemi and a 2004 ram 1500 hemi. when the tailpipe goes under water both vehicles start to blow steam and the engine light comes on. last week just after leaving the engine runnig while i loaded the boat - the valves started knocking really loud and now i have a hefty repair bill to reinstall new valve lifters. does anyone have any ideas why none of my other trucks have ever had this problem. im gonna hate myself for this...... why you did not state is the exhaust was stock or not but i have a theory here as to what likely may have happened. and as usual your theory is a tad bit far-fetched.. not at all. it is very logical and bases on the physics of expanding and cooling gasses. dood the only expanding and cooling gasses you got is in your pants. when your engine idles there is actaully a negative pulse several times a second in the exhaust system due to low flow and a combination of sonic wave travel and the rapid cooling of the exhaust gas. im sure you read this in a book somewhere and picked up on the theory of it but didnt finish reading the chapter. you should do the reading because it you applied a vacum gage to the exhaust system at a idle you would find that a negative plus does exist at a idle at time and it would be worse with duals. what when you placed tailpipe in the water it started to ingest a little water during the negative pulses and it worked its way up into the system further which further cooled the pipes and gas and increased the draw of water into system and it may have gotten into engine itself. id pay good money for you to demonstrate this in the real world. id even let you use my own personal truck. id even drive down to dayton close enough for you to do it. maybe just maybe if the engine in this demonstration had enough non-sealing exhaust valves no muffler or cat converter it might do this but i really doubt it. think of this an engine is an air pump. if the engine is to stay running it must be moving air. while a little water may get inside the tailpipe do you really think that water will take on the charactoristics of a salmon and swim its way thru a muffler ten feet of pipe and a cat converter while battling that flow of air coming thru the pipe i think youre confused this issue with the issue of an exhaust manifold gasket leaking that can suck in cold air and burn a valve. the water would not have to swim up the pipe as it would be drwan up it by the negative plus durring low flow at a idle and it would be self feeding in that as the water got in there it would cool the gases more and increase the strength of the negative pulses. also you must factor the angle of the ramp because if it is a shallow angle it would be easier for the water to be drawn up into it. people tend to think that there is always psotive pressure in the exhaust system but this is not always the case at a idle with a low restriction system. hold a piece of paper over exhaust outlet at a hot idle and watch how it is drwan tight against it several times a second and the lowe the restriction of the exhaust the more noticable it is at times. a diesel would not have this problem because it moves a lot of air through system all the time because there is no throttle valve limiting the intake air flow. if you have a dual exhaust it would actual tend to be more prone to this yet because the quicker expansion and cooling of gas at a idle and stronger negative pressure pulses. expensive lesson for sure. if you want to avoid this in future keep tail pipes out of water and place a restrictor in pipes a restrictor in the pipe muffler or cat converter fit this description no a cat would not fit this bill you would need to have a more restrictive exhaust so that a negative pressure never developes and this could be done temporarily with a retrictor inserted into pipes outlet when it water. i think id rather try to reason with my three year old grandcritter.. only if you are on that level too and if it makes you more comfortable. i do not make the rules of physics but i know how to apply them which some do not so they dismiss it as hogwash. i have yet to see another possible plausable theory that could explain this posted here. do not shoot the messanger because you do not understand the message. there is a lot more to the dynamics involved here than people realize. denny durring this time so the a higher pressure is maintained during idle cycle which reduce the negative pulse to zero. if you have duals go back to a stock exhaust. ----------------- thesnoman.com ----------------- thesnoman.com .
From : joe colella
on fri 15 sep 2006 224257 gmt denny wddodge@woh.rr.com wrote on 14 sep 2006 104850 -0700 fp@odonnelldrg.com wrote i have a 2004 durango hemi and a 2004 ram 1500 hemi. when the tailpipe goes under water both vehicles start to blow steam and the engine light comes on. last week just after leaving the engine runnig while i loaded the boat - the valves started knocking really loud and now i have a hefty repair bill to reinstall new valve lifters. does anyone have any ideas why none of my other trucks have ever had this problem. im gonna hate myself for this...... why you did not state is the exhaust was stock or not but i have a theory here as to what likely may have happened. and as usual your theory is a tad bit far-fetched.. not at all. it is very logical and bases on the physics of expanding and cooling gasses. when your engine idles there is actaully a negative pulse several times a second in the exhaust system due to low flow and a combination of sonic wave travel and the rapid cooling of the exhaust gas. im sure you read this in a book somewhere and picked up on the theory of it but didnt finish reading the chapter. you should do the reading because it you applied a vacum gage to the exhaust system at a idle you would find that a negative plus does exist at a idle at time and it would be worse with duals. when you placed tailpipe in the water it started to ingest a little water during the negative pulses and it worked its way up into the system further which further cooled the pipes and gas and increased the draw of water into system and it may have gotten into engine itself. id pay good money for you to demonstrate this in the real world. id even let you use my own personal truck. id even drive down to dayton close enough for you to do it. maybe just maybe if the engine in this demonstration had enough non-sealing exhaust valves no muffler or cat converter it might do this but i really doubt it. think of this an engine is an air pump. if the engine is to stay running it must be moving air. while a little water may get inside the tailpipe do you really think that water will take on the charactoristics of a salmon and swim its way thru a muffler ten feet of pipe and a cat converter while battling that flow of air coming thru the pipe i think youre confused this issue with the issue of an exhaust manifold gasket leaking that can suck in cold air and burn a valve. the water would not have to swim up the pipe as it would be drwan up it by the negative plus durring low flow at a idle and it would be self feeding in that as the water got in there it would cool the gases more and increase the strength of the negative pulses. also you must factor the angle of the ramp because if it is a shallow angle it would be easier for the water to be drawn up into it. people tend to think that there is always psotive pressure in the exhaust system but this is not always the case at a idle with a low restriction system. hold a piece of paper over exhaust outlet at a hot idle and watch how it is drwan tight against it several times a second and the lowe the restriction of the exhaust the more noticable it is at times. a diesel would not have this problem because it moves a lot of air through system all the time because there is no throttle valve limiting the intake air flow. if you have a dual exhaust it would actual tend to be more prone to this yet because the quicker expansion and cooling of gas at a idle and stronger negative pressure pulses. expensive lesson for sure. if you want to avoid this in future keep tail pipes out of water and place a restrictor in pipes a restrictor in the pipe muffler or cat converter fit this description no a cat would not fit this bill you would need to have a more restrictive exhaust so that a negative pressure never developes and this could be done temporarily with a retrictor inserted into pipes outlet when it water. i think id rather try to reason with my three year old grandcritter.. only if you are on that level too and if it makes you more comfortable. i do not make the rules of physics but i know how to apply them which some do not so they dismiss it as hogwash. i have yet to see another possible plausable theory that could explain this posted here. do not shoot the messanger because you do not understand the message. there is a lot more to the dynamics involved here than people realize. denny durring this time so the a higher pressure is maintained during idle cycle which reduce the negative pulse to zero. if you have duals go back to a stock exhaust. ----------------- thesnoman.com ----------------- thesnoman.com .
From : joe colella
thanks! sqdancerlynn wrote hollander interchange manuals most wrecking yards have them my local public library has one too. you can buy your own but they are darn expensive. -- .bob arrived 2006 fxdi red. 1997 hd fxdwg - turbocharged stolen 11/26/05 in denver 1hd1gel10vy3200010 co license j5822z 2001 dodge dakota qc 5.9/4x4/3.92 1966 mustang coupe - daily driver 1965 ffr cobra - 427w efi damn fast. .
From : bob
thanks! hollander interchange manuals most wrecking yards have them .
From : sqdancerlynn
if you do not like the route its taking you when it gets to a part you dont like and want to go around just turn it will do everything but call you stupid then find an alternate route eventually you can force it to choose the route you want to use if there is an area you dont want it to go through. another thing ive done on mine is ive chosen the truck/rv selection under vehicle that will eliminate it wanting to go through towns and neighborhoods so much i keep it on fastest route believe me i love my garmin but i keep bitchin betty busy through areas like atlanta when i know i dont want to be on the road she thinks i need to be on. its not bettys fault. i drive in atlanta traffic every day. i dont want to be on the roads that i /know/ i need to be on. i travel 75 & 285 seven times a week. -- ken .