Re: Groves in cylander walls

Posted by DJ.Voyce on April 20, 1998 at 01:05:15

In Reply to: Groves in cylander walls
posted by Gary MacRunnel on April 19, 1998 at 23:16:03

G'Day Gary,
Oversize pistons are available from most suppliers in oversizes from 0.020" up to 0.125", though personally I wouldn't recommend going above 0.060". If you're a bit tight on finances you may have to go for a bigger oversize as a re-sleeve job would probably more that double the cost of the re-bore. Your local automotive engineering shop would be able to measure the bores & tell you what size to buy, but they'd always require the new pistons before re-boring. The problem has either been caused by someone leaving out the snap rings in the piston which stop the pin from sliding out, fitting a pin with no centre groove which locks onto a ring fitted between the wrist pin bushes in the conrod, or this locking ring in the conrod is distorted or has been left out.
Regardz
DJ.
OutOfAfrica A's
: Just pulled the head off a motor I bought with some other stuff and it has groves in the cylander walls on the front and back side of each cylander that appears to be caused by loose wrist pins.I assume this it not normal (pretty tuff to get good compression that way I figure) so my question is how much can an A block be bored out without causing problems with the walls being to thin, and is it worth it to do this having to by new pistons, etc?Anybody else witnessed this problem?
: Thanks.
: Gary

Follow Ups:
Re: Groves in cylander walls Giles Dillingham April 21, 1998 at 07:58:16(1)
Re: Grooves in cylinder walls DJ.Voyce April 21, 1998 at 11:33:56(0)
Re: Groves in cylander walls Dave Sturges April 20, 1998 at 10:17:08(0)

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