My 930/02 engine has got no or VERY LOW oil pressure. This is after I have had the top end rebuild.
Background:
Well, I have owned the car for about ten years. Back in 2007 I decided to start out on completely rebuilding the car.
This is the thread on that:
My Carrera 3.0 LWT project
In the last parts of that thread, you'll see, I stumpled on broken head studs...
Let me say, the engine ran absolutely perfect in every aspect before me starting taking the car apart. Good oil pressure ( about 1b/1k rpm)
After discovering the head stud problem, I send the engine to Bruce flat6pac. He was very kind to help me out and performed the rebuilt with a quick turnaround.
When I got it back and fired it up, I ran into electrical problems. This is the thread:
Electrical problems, no charge and strange indications
I ended up buying a new alternator from pelican.
Unfortunately it did not solve the strange oil pressure indications.
They would start out high, as normal on a cold engine, but then drop to between one and two bars (EDIT: within seconds), and bounce around in a wonky fashion. I thought I either had a sender or a gauge malfunction.
I tried to change the sender. It didn't change anything. So now it was down to the gauge. Why would a freshly rebuilt engine, not have oil pressure...
This weekend, I put on a wet gauge. By drilling and tapping into the block where the pressure sender is located. Unfortunately that gauge agrees with the dash gauge.
The oil pressure stays about one bar, only ones have it kind of jumped up like the gauge dash did in the beginning.
This has scared the crap out of me. I have e about 30 miles on it, just a swag. I won't drive it anymore in to this has been diagnosed and sorted.
I have been thinking abuot how to trouble shoot this, but having never seen the inside of a case, I am limited to guess work from readin diagrams.
I have found some diagram from Grady and others.
Question: would it be plain stupid to try and blow compressed air into where the oil comes out of the block to the pressure and temp sensor, not seeing this as a fix, but just to see if something is blocking the journals and maybe I would see a temp change in oil pressure?
I guess there are two scenarios:
1. The engine oil pump really does not supply pressure because of an internal clog. In isi a case what do I do?
2. There is something external that prevent the oil put from supplying pressure. What could this be?
The car has got the original oil lines. They have been flushed in mineral spirit.
It has got a brand new Setrab 172 front mounted cooler.
I will stop here for now realizing this is already plenty cluttered as it is.