Oil Pump Woes

It won't be too bad......004" gear clearance will probably drop the pressure 2 or 3 psi at most.

It's as well not to raise the operating pressure much above standard, as too high a figure can overload the skew gears that drive the distributor/pump.
 
You can fit the standard MGB V8 relief valve spring ( was sold by real steel)
which upped the pressure on a standard oil pump to about 50 psi if I remember rightly.
Clive.
 
Yes I figured that hunting for a better front cover might equal the search for the Holy Grail. I would do the bolt mod if it was not for the access issue once the engine is in.
I plan on doing an oiling mod to the skew gear by drilling a .020" hole in the oil gallery in the front cover pointing at the gear, it is supposed to cost a couple of psi but may help gear life.
 
cobraboy said:
I plan on doing an oiling mod to the skew gear by drilling a .020" hole in the oil gallery in the front cover pointing at the gear, it is supposed to cost a couple of psi but may help gear life.
Click to expand...

Yes, I remember reading about that somewhere...might have been in Des Hammill's book.
 
cobraboy said:
I plan on doing an oiling mod to the skew gear by drilling a .020" hole in the oil gallery in the front cover pointing at the gear, it is supposed to cost a couple of psi but may help gear life.
Click to expand...
I saw an article once where a guy ran an external line to a jet in the front cover to oil the skew gears.
 
Yes a guy has done that to an engine in a Cobra replica on another forum. I want to see if I can do it without the external line. I will throw up a pic. My problem is going to be finding a drill chuck small enough to hold the drill.
 
Before you bolt the oil pump back to the timing cover, please insert the one screw to the timing cover which is then hidden by the oil pump, otherwise when you are re-installing the timing cover, you will finally end here :mad:
 
Hi Stan,

Sorry to hear that the pressure is not as it should be. Did you notice if there was any damage to the gear housing within the timing cover? Wear and or damage here will, so it is my understanding, see a reduction in oil pressure.

Ron.
 
Oh well....didn't get away with it then. :(

First two pics are the centre main cap shell, and the third is No.2 main cap.

But there's also fingernail-evident scoring on the journals.... :mad:



 
Gee, I am really sorry to see that Stan.

Could it have been foreign material that caused the scoring, eventually becoming lodged in the oil pump resulting in the broken gear?

Ron.
 
Cobraboy - "I plan on doing an oiling mod to the skew gear by drilling a .020" hole in the oil gallery in the front cover pointing at the gear, it is supposed to cost a couple of psi but may help gear life. "
Did you ever do this mod? I have an SD1 cover ready to go on, and a pin vise....Hammill also showed holes drilled in the block from the valley front into the timing cover area - has anybody done this mod?
thanks
 
Wow 4 years ago !!! I cannot remember what I had for breakfast yesterday :)
I cannot remember drilling the squirter hole, and I suspect the reason that I did not is because of the amount of miles the engine was likely to cover in the future. I have not had any issues with wear on other RV8's in that area. If the engine was to do a lot of miles then it would be a no brainer.
I have done the valley drain holes though, 2 x 6mm as low as they can go to drain into the timing area.
I would also look a lot differently at many jobs done in the past now. Years back I was always trying to cram in projects around work and life stuff, now I have more time I would be able to do all the nice frilly bits around a build.

I also built my 4.6 using a stock timing chain on the advice of Turner Engineering who tell me that they only use the stock chain in all their motors.
 
jp928 said:
Cobraboy - "I plan on doing an oiling mod to the skew gear by drilling a .020" hole in the oil gallery in the front cover pointing at the gear, it is supposed to cost a couple of psi but may help gear life. "
Did you ever do this mod? I have an SD1 cover ready to go on, and a pin vise....Hammill also showed holes drilled in the block from the valley front into the timing cover area - has anybody done this mod?
thanks
Click to expand...

I know someone that has done it, IIRC he did 2, one spraying the dizzy gears, the other spraying directly on to the timing chain. He ran aeroquip hoses from the gallery plugs on the filter housing to nozzles screwed into the timing cover. As it's an unfinished (albeit running) project I can't give any data on the long term effectiveness.
 
As far as I know that mod was done in the touring car days due to the very high distributor drive wear over 6000 RPM.
 
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