I was taking off my intake manifold to do a change over to EFI. I noticed that the closed valves have oil on the back of them (this is a SBC 350). Engine only has 1000 miles and valve seals were new (viton ones), heads were new (bronze guides).
Engine had been sitting for 2 weeks without...
I'm going to make the bypass of the oil pump in my engine dumping the oil back into the oil pan. I'm a bit worried about aeration occuring. Is there a good way to prevent it from happening ?
FWIW redline begins at 7500.
I'm not sure which situation your describing as the effects were more pronounced with the heavier wt oil. Hot idle oil pressure 25-30, going towards 60 before 5000 and then dropping to 45-50 towards 6000.(10W40 TOTAL)
Last time (with the 5W30) hot idle 40-45...
Adding to this, I have a feeling I'm running in circles now.
I've been asking a lot of people about this but none of the answers are conclusive yet. It seems like everybody is pointing towards another cause in relation to this issue (not aiming at anybody btw).
Someone said to me he had the...
I believe that was the no 2 and 6 bearings. I believe they crossdrilled the crank or something like that. The air story seemed strange to me as well.
I'm not expert on oils. What oil does have the properties you gave ?
PS : the oil I used before was a 10W40 Total 7000 quartz.
The oil says it's for both diesel and gasoline engines.
As for the difference in cSt at 100°C, on average 2 cSt I think.
Someone said to be carefull with the external bypass and air seggregation in the line, which could lead to the air going to the engine and the oil via the bypass. He said...
And would that create enough hydrodynamic wedge to let the oil provide enough oil film strenght ?
Anyway, the air entrainment because of injecting the oil will be as worse as in the internaly bypass since it would do it at the same speed and with the same volume. Only the external bypass would...
That's what they said. I interpret it like this : the bypass channel in a typical sbc oil pump enters the inlet channel in a 90° fashion. Due to it being pressurized I think it will hit het opposite wall causing it to go into 2 directions, 1 part in the direction of the pump gears and the other...
Caterham, I already run 5W30 at the moment as explained earlier.
If I go this route I would set the external bypass at 70 and leave the internal at 75 psi. The oil pump would not get to 75 anymore basically rendering the internal bypass out of operation. The only negative I see is that it has...
Another update to this. I was suggested contacting Schumann oil pumps. They make specialty pumps for these engines but based on the Original design, which my pump is by the way.
Anyway, I explained the problem and they suggested a HV pump (which seems to be a requirement with my engine) but...