Does "piston slap" decrease compression in an engine?
11-30-2005, 05:05 PM
#1
it is on low boost
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Does "piston slap" decrease compression in an engine? I am thinking of getting my engine compression tested after hearing excessive "piston slap" in the engine bay area.
Does anyone know what the going rate for a test like this would cost me? Has anyone had this problem before? What causes it?
Any info would be appreciated.
Does anyone know what the going rate for a test like this would cost me? Has anyone had this problem before? What causes it?
Any info would be appreciated.
11-30-2005, 06:26 PM
#2
TECH Junkie
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Originally Posted by Nick K
I am thinking of getting my engine compression tested after hearing excessive "piston slap" in the engine bay area.
Does anyone know what the going rate for a test like this would cost me? Has anyone had this problem before? What causes it?
Any info would be appreciated.
Does anyone know what the going rate for a test like this would cost me? Has anyone had this problem before? What causes it?
Any info would be appreciated.
11-30-2005, 07:30 PM
#3
Piston slap won't hurt your compression itself. The piston slap can be caused by a number of things. One being a long stroke witch moves the pin up farther in the piston and caused more sideload on the skirts of the piston causing them to wear excessivly or the bore to wear excessively or a combination of both etc... Forged pistons also exagerate this cause they expand more than a cast piston and so on a cold start up they are louder. Once they reach operating temp it gets quieter or goes away totaly depending on what it is caused from and how bad the clearances are or how mcuh they are worn (Pistons and Bore.). As far as the test it shouldn't cost to much at all you can rent a compression tester and do it yourself if you can. A leak down test can tell a lot also. Good luck!
11-30-2005, 08:32 PM
#4
it is on low boost
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Originally Posted by Inspector12
Piston slap won't hurt your compression itself. The piston slap can be caused by a number of things. One being a long stroke witch moves the pin up farther in the piston and caused more sideload on the skirts of the piston causing them to wear excessivly or the bore to wear excessively or a combination of both etc... Forged pistons also exagerate this cause they expand more than a cast piston and so on a cold start up they are louder. Once they reach operating temp it gets quieter or goes away totaly depending on what it is caused from and how bad the clearances are or how mcuh they are worn (Pistons and Bore.). As far as the test it shouldn't cost to much at all you can rent a compression tester and do it yourself if you can. A leak down test can tell a lot also. Good luck!
Thanks.
11-30-2005, 08:55 PM
#5
Nick why don't you give Chris Eurlic a call I think you know him right. He work over at MTI and maybe able to help you out on that. Other than that any one of out local shops can do this for you just give them a call and see what they charge for it and make your decision.
Jeff
Jeff
12-01-2005, 12:07 PM
#7
it is on low boost
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Does he work on LT1's? I was sort of hoping to get some price feedback from the sponsors to the right but if I can't, I just might have to give you or Chris a call. PM me some contact info and pricing.
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12-01-2005, 12:52 PM
#9
it is on low boost
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Originally Posted by BADZ
It's called nitrous slap!!!!! 
12-01-2005, 12:59 PM
#10
jeff is a good dude, he'll come thru for ya... i know how it feels man, i fucked my car up last night... jeff is supposed to call me today and ill tell him to get ahold of you
