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08-26-2010, 11:54 AM
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Join Date: Jan 2004
Location: Shawbury,
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oiling system mods
Most people recommend installing screw in oil gallery plugs instead of the press in plugs for safety.
Also on some Mopar engines it seems common to drill a small hole in a plug behind the distributor gear in order to provide adequate oiling for the gears.
I've seen some people recommend this for the sbf too. Makes sense to me, especially when using a roller cam.
Are there any known drawbacks?
The one to drill would be on the left:
What screw in plug size fits the bores?
Simon |
08-26-2010, 12:04 PM
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Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
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3/8" pipe plug
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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08-26-2010, 02:54 PM
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Senior Club Cobra Member
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Quote:
Originally Posted by CobraV8
Most people recommend installing screw in oil gallery plugs instead of the press in plugs for safety.
Also on some Mopar engines it seems common to drill a small hole in a plug behind the distributor gear in order to provide adequate oiling for the gears.
I've seen some people recommend this for the sbf too. Makes sense to me, especially when using a roller cam.
Are there any known drawbacks?
The one to drill would be on the left:
What screw in plug size fits the bores?
Simon |
Yes the one on the left in the photo, with the block upright, it's on your right and I drill a .015 hole in the center of the plug,it'll shoot a small stream of oil on the backside of the timing gear, keeping everything lubed......been doing that for sometime now....
David
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DAVID GAGNARD
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08-26-2010, 05:48 PM
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Although I don' really see any advantage to it, I can't see that it would hurt anything. AFAIK, there are very few people doing this to SBF's. And yet, I almost never hear of an early timing chain/gear failure. |
08-26-2010, 05:49 PM
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If you don't drill the hole, then how does it get lubed from the factory ????
.
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08-26-2010, 06:13 PM
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Quote:
Originally Posted by CobraEd
If you don't drill the hole, then how does it get lubed from the factory ????
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I'm guessing splash lubrication..........
Quote:
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Although I don' really see any advantage to it, I can't see that it would hurt anything.
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I can't remember exactly, but I've seen this on a number of factory engines,chevy's if I remember right.........
David
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08-26-2010, 06:16 PM
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I've seen it on BBC's.
On Fords, I don't do it, I just tap the galley plugs for threaded plugs. The timing chain should get lubed by oil splash.
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08-26-2010, 07:30 PM
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It actually squirts on the distributor gear, not the chain.
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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08-27-2010, 01:34 AM
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Quote:
Originally Posted by bobcowan
And yet, I almost never hear of an early timing chain/gear failure.
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There seem to be lots of problems with premature distributor and/or cam gear wear when using a roller cam. That's why I'm thinking about this.
My idea was to drill the plug at an angle so the oil will squirt directly on the meshing gears as shown in this sketch:
I hardly found anything about this modification on the internet, that's why I wanted to hear some opinions. |
08-27-2010, 04:59 AM
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The galley plug your talking about is a plug on the oil galley that feeds the lifters. I don't think it has anything to do with the cam gear and distributor gear, drilling the hole in it will shoot oil on the backside of the upper timing chain gear, the splash from that will lube where cam gear/distibutor gear mesh....otherwise, the cam gear/distibutor gear are lubed from the oil slinging off the crankshaft at the #1 journal....
I'm not sure you could drill the hole at enough angle to directly shoot oil on the cam/ditributor gear...
It can't hurt to do it though and I do it on my engines just for adding oiling....
David
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DAVID GAGNARD
Last edited by DAVID GAGNARD; 08-27-2010 at 05:02 AM..
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