hmm piston slap. a real bummer! it did not go away when it heated up huh?
there were a lot of older(lots older) cars that had piston slap when cold
but upon heating up (causing piston to expand in bore) they quieted up and
ran just fine.
how badly scored are the bores or piston sides? inquiring
minds.................(allen you can jump in here any time! lol!).
chuck.
i'm taking a garage break tonight! resting up for a big day tomorrow! lol.
:)
----- Original Message -----
From Ulix Goettsch <ulix at u.washington.edu>
To: Spridget List <spridgets@autox.team.net>
Sent: Monday, November 06, 2000 1:23 AM
Subject: Piston to bore clearance
> Next installment in the Sprite that sounds like a Diesel.
> The mystery is solved, it was indeed excessive piston to bore clearance.
> The manual suggests between .002" and .003". I have between .006" and
> .007".
> (Question: Is the figure in the shop manual the clearance you measure with
a
> feeler gauge, or is it a clearance that is all around the piston, so that
I
> would have to double it to compare to my finding?)
>
> I measured all 4 bores and they are all the same.
> The bore diameter is the only thing I didn't measure when I assembled the
> engine. At the time I didn't want to remove the rings from a piston in
fear
> of breaking them. I wish I had done this.
>
> I had taken my block and pistons to an LBC resto shop that then had their
> regular machine shop do the work. I'll call the shop on Monday to see
what
> they say.
>
> Damn. I should have sent it all to APT...
>
> If I have to put it back together as is, would STP or Engine Restorer help
> in any way?
>
> Thanks again to everyone who helped with their suggestions.
> Ulix
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