White smoke and low oil pressure

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jgr
New Member

Posts: 5

White smoke and low oil pressure Mar 16, 2011 18:47:01 GMT -7

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Post by jgr on Mar 16, 2011 18:47:01 GMT -7

The truck is a '63 c10, 3.8L, 230ci. New head, new head gasket, all new upper gaskets, rebuilt carb, and electronic ignition.

I get white smoke every now and then, sometimes at idle, sometimes when I change gears. No other symptoms that I can see except that my oil pressure drops to about 5psi at idle (after the truck gets warm) but goes up to 20-35psi at speed.?

I suspect piston rings. Any other ideas?

Last Edit: Mar 16, 2011 18:47:22 GMT -7 by jgr

LittleStar
New Member

'66 Short Fleetside - A Major Project

Posts: 25

White smoke and low oil pressure Mar 27, 2011 12:07:56 GMT -7

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Post by LittleStar on Mar 27, 2011 12:07:56 GMT -7

White/blue smoke out the exhaust means oil in the combustion chambers: piston rings/valve guides. Low oil pressure at idle after warmup probably means that the main/rod/cam bearings have seen their best days. Sounds like the ol' girl is ready for an overhaul.

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