Timing Chain Lubrication

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06-15-2009, 12:25 PM
Rick Rush

Timing Chain Lubrication

I'm going to put a new timing chain in my sbc 350. In looking at all the timing chain set-ups out there, I noticed some of the cam gears are solid (no holes around the circle) and some have 6 or 8 holes drilled in them. Where does the oil come from that lubes the timing gears and chain. Is it pumped out from behind the cam gear or slings up from an oil hole in the crank. If it's pumped from behind the cam gear wouldn't it be better to get a timing chain with holes in the cam gear so the oil would run down the front side and lube the chain and crank sprocket. Just wondering. I know alot about engines just not how all the oil is pumped around to all the places. Thanks::o
06-15-2009, 02:44 PM
HWORRELL

Timing gear is oiled by splash/drainback from the lifter valley. Been that way on every small block chebby ever made so it must be sufficient.:D:D:D
06-15-2009, 03:43 PM
pat mccarthy

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some guys kill two birds with one stone .:3dSMILE:if you drill the galley plugs keep air lock out and oils the chain
06-15-2009, 04:07 PM
jerry clayton

those plugs are available already drilled from Pioneer
06-15-2009, 04:34 PM
pat mccarthy

Quote:

Originally Posted by jerry clayton

those plugs are available already drilled from Pioneer

well it give s me some thing to do jerry :3dSMILE:and i can use the drill to drill out the stamp cup plugs
06-15-2009, 06:50 PM
jerry clayton

wait till you decide to drill one of them rods to oil those bushings up the center!!!!!!
06-15-2009, 07:16 PM
pat mccarthy

1 Attachment(s)

Quote:

Originally Posted by jerry clayton

wait till you decide to drill one of them rods to oil those bushings up the center!!!!!!

no way on the drill EDM:3dSMILE: rods like this jerry:3dSMILE:
06-15-2009, 07:43 PM
jerry clayton

they're nice pieces, huh???
06-15-2009, 07:44 PM
pat mccarthy

Quote:

Originally Posted by jerry clayton

they're nice pieces, huh???

seam to work well . use them ?
06-15-2009, 08:38 PM
jerry clayton

no but have done several squirters---altho it comes from the mains it leaves the oil on the rod journal for the rod bearing until it slings out and then we'll use 2 holes at lower side of wrist pin and some bigger clearances--well not big clearance but it seems all the stuff comes pretty tight so we open them up to our specs
06-15-2009, 08:48 PM
pat mccarthy

i had some bbc that had that done off the mains with the screw in jets.help keeps some oil on the under sides of the pistons to help cool as well .the rods in photo shoot oil up the rod in to the pin nice .just have to ball mill the uppers for the oiler pee hole