998cc
Petty Officer 2nd Class
- Joined
- Mar 30, 2013
- Messages
- 159
Hello all. Thanks for reading this thread. I know this issue is covered elsewhere in the forum, but I am confused with the results of my block pressure test. I have water in the oil of my engine, a GM 250ci 6cylinder, yet there is no sign of air escaping air when pressurizing the water jacket. I used a soap bubble over the oil cap hole with up to 30 psi into the water jacket with zero distension of the bubble. There is no sound heard with my ear covering the oil fill. I verified pressure in the block by removing the winter drain plug.
Method of test:
1. Drained water jacket.
2. Connected the compressor hose the water intake hose and clamped tightly.
3. Disconnected and plugged hose from thermostat housing to the manifold.
4. Plugged the oil dipstick and PCV holes.
5. Pressurized slowly to 15psi then 30psi.
Could I possibly have a good block or is there a flaw in my testing?
Can water get into the oil via the intake/exhaust manifold or other location?
Is there another place air could be escaping unnoticed?
I will certainly appreciate your thoughts on this.
Thanks!
Method of test:
1. Drained water jacket.
2. Connected the compressor hose the water intake hose and clamped tightly.
3. Disconnected and plugged hose from thermostat housing to the manifold.
4. Plugged the oil dipstick and PCV holes.
5. Pressurized slowly to 15psi then 30psi.
Could I possibly have a good block or is there a flaw in my testing?
Can water get into the oil via the intake/exhaust manifold or other location?
Is there another place air could be escaping unnoticed?
I will certainly appreciate your thoughts on this.
Thanks!
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