Ulix.
Did you have them offset bore the block? If so, you should be able to go
one final last size bigger on the pistons. Otherwise, the block is boat
anchor material.
Should you choose to reassemble and run it as is, I would guess it would
have a relatively short life. The pistons will slap, rapidly wearing the
bore and piston skirts. Then the bore damage will chew up the rings.
David Riker
74 Midget
63 Falcon
70 Torino
http://personalweb.sunset.net/~davidr
----- Original Message -----
From "Ulix Goettsch" <ulix at u.washington.edu>
To: "Spridget List" <spridgets@autox.team.net>
Sent: Sunday, November 05, 2000 5:23 PM
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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