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TR2/3/3A The bolt on the back of the tr3 head
- Thread starter Got_All_4
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TR3driver
Great Pumpkin - R.I.P
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Its a blanking plug, where the oil passage is drilled sideways. Moss and others sell the kit to feed high pressure oil through it.
I tried it (on an engine where the normal passage was blocked) and didn't like the results. Way too much oil up top!
The experiment ended when one of the valve seals I added came apart, and the excess oil being sucked into one cylinder at freeway speeds caused a broken pistonIts a blanking plug, where the oil passage is drilled sideways. Moss and others sell the kit to feed high pressure oil through it.
I tried it (on an engine where the normal passage was blocked) and didn't like the results. Way too much oil up top!
The experiment ended when one of the valve seals I added came apart, and the excess oil being sucked into one cylinder at freeway speeds caused a broken piston
..
photobucket
I tried it (on an engine where the normal passage was blocked) and didn't like the results. Way too much oil up top!
The experiment ended when one of the valve seals I added came apart, and the excess oil being sucked into one cylinder at freeway speeds caused a broken pistonIts a blanking plug, where the oil passage is drilled sideways. Moss and others sell the kit to feed high pressure oil through it.
I tried it (on an engine where the normal passage was blocked) and didn't like the results. Way too much oil up top!
The experiment ended when one of the valve seals I added came apart, and the excess oil being sucked into one cylinder at freeway speeds caused a broken piston
..
photobucket
Last edited:
OP
Got_All_4
Luke Skywalker
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I heard the same thing on the 6 cylinders too. The rockers only get momentary oil pressure from the rear cam bearing where there is a flat spot and when it comes around it sends oil to the rocker shaft. What if you reduced the size of the hole in the bolt for the banjo fitting therefore reducing the amount of oil to the top of the head. Should cut down on flooding the valve guides with too much oil and you should have 100% pressure to the rockers.
TR3driver
Great Pumpkin - R.I.P
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I tried several things like that but not making a new bolt. I'll let you try that one!
IMO the stock design is perfectly adequate if you observe factory redline. The rockers simply do not need as much oil flow as the rod and main bearings do.
Possibly more flow is needed for continuous operation over 5000 rpm, but I'm dubious even about that. And if so, I'd be looking at roller rockers anyway. The only reason to need a continuous oil flow is to carry away heat.
IMO, dirty oil is much more of a problem than lack of flow.
I've lost track of just when I had a pair of rocker shafts rebuilt last, but it was some time before 2000. The 2nd one is still on the shelf, as the first one is still in good shape with probably over 100,000 miles on it. (I moved it from the wreck.)
IMO the stock design is perfectly adequate if you observe factory redline. The rockers simply do not need as much oil flow as the rod and main bearings do.
Possibly more flow is needed for continuous operation over 5000 rpm, but I'm dubious even about that. And if so, I'd be looking at roller rockers anyway. The only reason to need a continuous oil flow is to carry away heat.
IMO, dirty oil is much more of a problem than lack of flow.
I've lost track of just when I had a pair of rocker shafts rebuilt last, but it was some time before 2000. The 2nd one is still on the shelf, as the first one is still in good shape with probably over 100,000 miles on it. (I moved it from the wreck.)