Can someone please tell me what piston slap is??!
#2
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When the bore of the engine goes oval and the piston is able to move from side to side a little. The engine would need a re-bore and pistons to cure this Not clever I looked at a sport the other week that suffered from this You can hear it by lightly revving the engine
Paul
Paul
#3
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My MY98 STi 4 has just come back from a £3200 engine rebuild because of this problem and apparently I got away lightly. I noticed what I thought was excess tappet noise and got it checked out. It was diagnosed as " Piston Slap ".
As part of the rebuild I had an uprated oil pump and cooler fitted, but most of the work done was to fix the problem.
As part of the rebuild I had an uprated oil pump and cooler fitted, but most of the work done was to fix the problem.
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What MY is your car ?. as on other threads the most prone years are MY 97/98 's. If its a UK motor you will be able to get it done under warranty, if dealer says its not a problem, cane him, beacuse the cure is a new short engine and he's just ducking the issue. Mine is an import so it was a case of raid the kids piggy banks.
#6
96/97P STI on 50K. I've just found a mp3 of the noise, and I don't think I have it. Its quite a "gruff" "growling" and makes the engine sound like its really fcuked. But I'm changing the oil later, and will be removing the heat sheilds before long....
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#8
If I didn't know better I'd say the car in the mp3 file was a diesel...
The file is online at http://homepage.ntlworld.com/alan.leslie/
The file is online at http://homepage.ntlworld.com/alan.leslie/
#9
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This used to happen a lot on Cossie's on the early days due to people tuning them wrong, all they were doing was winding up the boost and fitting bigger injectors, the excess fuel at low rpm was washing the oil from the bores and the rings were gouging the bore causing them to get larger than the pistons then the pistons would rattle about a bit, its especially noticeable when a engines cold.
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You will know the sound its like a "clack clack clack " sort of a noise when its cold and on rev pick-up, not gruff at all. Get a good oil monkey to have a listen. I was lucky the lad I know through the garage when my Mrs works is into the Group N rally scene, and he recognised it straight away. Engine out and sent to Gwynnes in Oxfordshire. Can't speak highly enough of them, job well done.
#12
Yep, its a sccob as far as I know. I found many links to it after doing a search for piston slap. I presumed that it would sound like a "slap." That tappy noise I have heard on every scoob engine I have ever heard, just to different degrees.
For the moment I'm gonna be happy with just sticking thicker oil in...
For the moment I'm gonna be happy with just sticking thicker oil in...
#15
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lol well i cant really tell which bit is supposed to be the slap bit lol
mines a little bit noisey and tappy when cold, but arnt all cars
im not that botherd, its sweet when its warm
its a 96/97 wrx on 58 000
mines a little bit noisey and tappy when cold, but arnt all cars
im not that botherd, its sweet when its warm
its a 96/97 wrx on 58 000
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