Backround info:
Newly built (by me) 306
Only pressure gauge is stock gauge.
Before rebuild, the gauge read between the "R" and "M" in "NORMAL" when cold,
and between the "O" and "R" when hot.
The engine had 250k + miles, and we live in a warm climate, so I used 20/50 oil.
Now, with the new engine, we are using 5/30 for break in, since the engine was built 'tight'.
Yesterday it was driven for the first time. It was 60* out.
Today it is 40* outside, and the engine ran for the first time dead cold at low outside temp.
We noticed during trial runs yesterday that the new engine was reading at the "L", which is much higher than before.
Today, it was running between "L" and the red zone at startup...
After driving 2 miles, the gauge creeped up into the red zone and pretty much pegged.
The sending unit is the same exact one as before. No changes there.
I know that generally speaking, the stock gauge is basically a 'yes' or 'no' gauge.
If it reads, you have oil pressure, if not, you don't have oil pressure.
So I am not really worried... just curious if anyone has had something like this happen.
I used a stock replacement pump, and a hardened pump drive.
So, is this just an anomoly of a poor gauge?
I know the pressure has to be high, but I can't imagine it overpressurizing.
Is the sender not used to such thin oil, and therefore acting differently?
Thoughts?
Newly built (by me) 306
Only pressure gauge is stock gauge.
Before rebuild, the gauge read between the "R" and "M" in "NORMAL" when cold,
and between the "O" and "R" when hot.
The engine had 250k + miles, and we live in a warm climate, so I used 20/50 oil.
Now, with the new engine, we are using 5/30 for break in, since the engine was built 'tight'.
Yesterday it was driven for the first time. It was 60* out.
Today it is 40* outside, and the engine ran for the first time dead cold at low outside temp.
We noticed during trial runs yesterday that the new engine was reading at the "L", which is much higher than before.
Today, it was running between "L" and the red zone at startup...
After driving 2 miles, the gauge creeped up into the red zone and pretty much pegged.
The sending unit is the same exact one as before. No changes there.
I know that generally speaking, the stock gauge is basically a 'yes' or 'no' gauge.
If it reads, you have oil pressure, if not, you don't have oil pressure.
So I am not really worried... just curious if anyone has had something like this happen.
I used a stock replacement pump, and a hardened pump drive.
So, is this just an anomoly of a poor gauge?
I know the pressure has to be high, but I can't imagine it overpressurizing.
Is the sender not used to such thin oil, and therefore acting differently?
Thoughts?
