Guest Removed Posted June 23, 2008 Report Share Posted June 23, 2008 and still run at 100%:asshole: with a dead hole :asshole: Quote Link to comment Share on other sites More sharing options...
lcz06 Posted June 24, 2008 Report Share Posted June 24, 2008 Noob question, how do you perform a leak down test? Is it in the same manner as a compression check? Quote Link to comment Share on other sites More sharing options...
koolrayz Posted June 24, 2008 Report Share Posted June 24, 2008 Did you do the test on a warm motor? While nothing accounts for #6 cylinder at 0# I have seen different between cold and warm engines. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 24, 2008 Report Share Posted June 24, 2008 Did you do the test on a warm motor? While nothing accounts for #6 cylinder at 0# I have seen different between cold and warm engines. It was cold. but on this car its a PITA to do warm to the car needing torn down to access one bank. ive done my car cold and warm and have not seen much difference it leakdown. having bad blow by the last few times it was drove, and losing 100hp on chassis dyno's in 1300 or so miles. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 24, 2008 Report Share Posted June 24, 2008 Noob question, how do you perform a leak down test? Is it in the same manner as a compression check? NO Quote Link to comment Share on other sites More sharing options...
Guest Hal Posted June 24, 2008 Report Share Posted June 24, 2008 I have always been told to do a leakdown only on a warm motor. I never really questioned this; however, if this is the car I think, it would make no difference. Quote Link to comment Share on other sites More sharing options...
Buck531 Posted June 24, 2008 Report Share Posted June 24, 2008 I know who it is.. and that fucking sucks. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 25, 2008 Report Share Posted June 25, 2008 I have always been told to do a leakdown only on a warm motor. I have seen different between cold and warm engines. On a higher mileage motor, yes , always do it warm. But on a fresh(er) engine. Bore is rather , how can i say...still round. Now we tired this test not that long ago at the shop. brand new car off the lot. pushed it into the shop pulled the plugs and did a leakdown on it. 5-10% is is what we got cold. Now we reinstalled the plugs and went and drove it till it was up to operating temp. brought it back in and retested it.5-10% is what we got. only reason i did it was to prove a point to another tech in the shop. Quote Link to comment Share on other sites More sharing options...
Mopar Posted June 25, 2008 Report Share Posted June 25, 2008 just a question. i always thought a compression check was to check for ring seal. so i assumed the two operations of leak down (which i have never done) and a compression check were one in the same. i am obviously wrong, could someone explain the difference? Quote Link to comment Share on other sites More sharing options...
Guest Hal Posted June 25, 2008 Report Share Posted June 25, 2008 Compression just checks how much compression is built in the cylinder. Leakdown checks for leaks at multiple places (rings, headgaskets, etc...) Quote Link to comment Share on other sites More sharing options...
Mopar Posted June 25, 2008 Report Share Posted June 25, 2008 Compression just checks how much compression is built in the cylinder. Leakdown checks for leaks at multiple places (rings, headgaskets, etc...) thanks Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 25, 2008 Report Share Posted June 25, 2008 Compression just checks how much compression is built in the cylinder. Leakdown checks to see how well the cylinder holds air(compression). fixxed Quote Link to comment Share on other sites More sharing options...
Guest Hal Posted June 25, 2008 Report Share Posted June 25, 2008 fixed Fixed You are correct though, it checks cylinder leakage. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 25, 2008 Report Share Posted June 25, 2008 Fixed You are correct though, it checks cylinder leakage. of course im correct. im not the one to lazy to pull a dash Quote Link to comment Share on other sites More sharing options...
Mopar Posted June 25, 2008 Report Share Posted June 25, 2008 so the leakdown is testing how much of the compression remains in the cylinder. if 5-10 percent is good for leakdown, what are good compression check numbers? Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 25, 2008 Report Share Posted June 25, 2008 you need atleast 100psi (compression test ) to even make a engine run. normally 150-180 depending on cam specs and what not. some race engine will push higher then that. on a compression test you are looking for evenness between the cylinders. like if you have 2 side by side that are both 75psi, then the head gasket is broke between the 2. and so on. normally you'll see about 135-150 or so on most engines. Quote Link to comment Share on other sites More sharing options...
Guest Hal Posted June 25, 2008 Report Share Posted June 25, 2008 of course im correct. im not the one to lazy to pull a dash Damn straight I'm too lazy. I'm still trying to figure out how you can do it so damn fast. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 25, 2008 Report Share Posted June 25, 2008 Damn straight I'm too lazy. I'm still trying to figure out how you can do it so damn fast. do about 15 or more then you can do them in your sleep . remember if no one else wants to do them. someone has to Quote Link to comment Share on other sites More sharing options...
Guest 614Streets Posted June 25, 2008 Report Share Posted June 25, 2008 so the leakdown is testing how much of the compression remains in the cylinder. if 5-10 percent is good for leakdown, what are good compression check numbers? No more than 15% between the cylinders on a straight compression test or else......... Quote Link to comment Share on other sites More sharing options...
AJ Posted June 25, 2008 Report Share Posted June 25, 2008 No more than 15% between the cylinders on a straight compression test or else......... and thats static compression and running compression test. Quote Link to comment Share on other sites More sharing options...
yellowsnake Posted June 25, 2008 Report Share Posted June 25, 2008 so whens the cat coming out of the bag to let us know who did it and such? Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 26, 2008 Report Share Posted June 26, 2008 motor has to come out and go back to machine shop. i should be there on the teardown to inspect for myself. and depending on what goes on from there, then we will go from there. but the owner of the car is so down at this point i dont think he even wants to mess with it. Quote Link to comment Share on other sites More sharing options...
Sam1647545489 Posted June 26, 2008 Report Share Posted June 26, 2008 What was the point of this thread? To bash the shop or what? Why not just post who it was and what shop did it even though I would think the said shop would fix it and make it right if it is a reputable shop. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted June 26, 2008 Report Share Posted June 26, 2008 What was the point of this thread? To bash the shop or what? Why not just post who it was and what shop did it even though I would think the said shop would fix it and make it right if it is a reputable shop. Main fact is im not sure if its bad workman ship or not. No bashing has been done. this thread was started to documnet my findings on undisclosed members engine. Granted at any shop mistake's will happen. Its how they are handled and if they are takin care of. But with said shop issue's have arised several times with work done on this forum and in my current place of employment. And I will say is the way our issue was handled was unprofessional. I am waiting for the outcome of how this is handled before any bashing begins. No sense in dragging someones name thru the mud if its not needed. And just why are you posting in this thread? Quote Link to comment Share on other sites More sharing options...
yellowsnake Posted June 26, 2008 Report Share Posted June 26, 2008 b/c he is one of many "cr gods" and know twice what you do. Quote Link to comment Share on other sites More sharing options...
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