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Author Topic:   Wrist pins and synthetic oil.
Big Block Capri
Gearhead

Posts: 110
From: Essex, Ontario, Canada
Registered: Nov 2000

posted 03-27-2002 09:11 AM     Click Here to See the Profile for Big Block Capri   Click Here to Email Big Block Capri     Edit/Delete Message   Reply w/Quote
Have any of you run across problems with wrist pin lubrication while using synthetic oil. The past two times that we have torn the motor down we have had severe galling in the pistons. We just installed new rods and they have floating pins and this may or may not solve the problem. Previously we were running stock rods with pressed pins. Two of the pins were blue and all but seized in the pistons. Scared the hell out of me, for obvious reasons.

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Paul Garant
"No replacement for displacement."

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Butch Jennings
Gearhead

Posts: 340
From: California
Registered: Apr 2000

posted 03-27-2002 11:54 AM     Click Here to See the Profile for Butch Jennings   Click Here to Email Butch Jennings     Edit/Delete Message   Reply w/Quote


Sounds like detonation to me.

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Butch
460 powered 1967 Comet Cyclone
10.271 @ 130.069
Butcher's Home Page
"Friends don't let friends drive Chevys"

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Big Block Capri
Gearhead

Posts: 110
From: Essex, Ontario, Canada
Registered: Nov 2000

posted 03-27-2002 12:26 PM     Click Here to See the Profile for Big Block Capri   Click Here to Email Big Block Capri     Edit/Delete Message   Reply w/Quote
We run 110 in it so we never figured that detonation would be a problem. C.R. is only at around 11.5

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Paul Garant
"No replacement for displacement."

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Moneymaker
Administrator

Posts: 11493
From: Lyons, IL, USA
Registered: May 99

posted 03-27-2002 12:52 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
You can get detonation from too much timing.
I don't think that is the probelm though. Either wrong clearances, not enough lubrication, or a bad l/r will cause pin galling. It's definatly NOT the oil.

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Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator

NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
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Just Strokin
Gearhead

Posts: 179
From: Tuscaloosa, Alabama
Registered: Dec 2001

posted 03-28-2002 09:17 AM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
TRW use to recommend drilling pin oiling holes from the oil ring to the pin on the old 351C pistons. Might consider this if you don't have any oiling holes for the pins.

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