Re: Piston Slap?????

[Andrew Duane USG <duane@hunch.zk3.dec.com>]

Hairy green toads from Mars made Raphael Avila say:

> I'm posting this for a web impaired friend....He has an '85 5K turbo that is
> in need of some diagnosis.  He says that the car runs strong, but is
> experiencing some "piston slap" (his term not mine...) and wants to know if
> the pistons are the wear item in this equation.  He needs to know if he
> needs a new block or can overbore the block and install new pistons.  I
> couldn't help him with this one, maybe you Audi cyber-gurus can.  Any/all
> help will be greatly appreciated.  BTW you can forwards the responses to me
> and I'll relay the info.

I had piston slap on my '85 Golf, straight from the factory.
The term refers to "loose" pistons slapping against the
sides of the cylinder bore. It sounds a lot like knocking
or something rattling in the engine.  In my case, it was because
the *!&@#^*!&@#^!@ factory put the WRONG PISTONS into an entire
model year's worth of engines. They were 1 size too small.

In this case, I would suspect that either the cylinder walls
have worn (bad rings, over work, bad oil) or the rings have
worn (same suspects).

I think he should have the engine torn down, and have the
rings and cylinders measured. Then make a decision.

-- 

Andrew L. Duane (JOT-7)			duane@zk3.dec.com
Compaq Computer Corporation		(603)-884-1294
110 Spit Brook Road
M/S ZKO3-3/U14
Nashua, NH    03062-2698

Only my cat shares my opinions, and she's too psychotic to express it