How to find water in oil leak, project
Thread Starter
Supreme Member

Joined: Aug 1999
Posts: 2,441
Likes: 1
From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
How to find water in oil leak, project
Need some support, hints and ideas, through this "project".
Last year I found some water in my oil, so I replaced both head gaskets and milled the heads. The old gaskets looked fine and when I started the engine I still got water in my oil so I put the car in a garage for the winter.
Now its time to find the leak and I want some help/hints on how to find the leak.
Today I made a pressure test on the cooling system, it went from 15 to 8 psi in about 2hours, cold engine.
Step 1.
I want to empty the intake and heads completly of coolant before I take the intake of to se if I got coolant in the intake valley, how do I do that?
Step2.
Make some plates and put on the heads and block of coolant hose from the radiator and pressurize the system again to see what happens.
Any other ideas or hint?
Last year I found some water in my oil, so I replaced both head gaskets and milled the heads. The old gaskets looked fine and when I started the engine I still got water in my oil so I put the car in a garage for the winter.
Now its time to find the leak and I want some help/hints on how to find the leak.
Today I made a pressure test on the cooling system, it went from 15 to 8 psi in about 2hours, cold engine.
Step 1.
I want to empty the intake and heads completly of coolant before I take the intake of to se if I got coolant in the intake valley, how do I do that?
Step2.
Make some plates and put on the heads and block of coolant hose from the radiator and pressurize the system again to see what happens.
Any other ideas or hint?
Joined: Sep 2005
Posts: 27,884
Likes: 2,434
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Step 1: Take the drain plugs out of the bottom of the block. THey're just a regular plug on the driver's side, and the knock sensor on the pass side.
What kind of sealer did you put on the head bolt threads?
What kind of sealer did you put on the head bolt threads?
Thread Starter
Supreme Member

Joined: Aug 1999
Posts: 2,441
Likes: 1
From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Ok, will take the KS out and the bolt on drivers side tomorrow....
No sealer on bolts, its a Motown block so the thread doesnt go into the water channels.
/N.
No sealer on bolts, its a Motown block so the thread doesnt go into the water channels.
/N.
Last edited by gta324; Mar 21, 2006 at 01:47 PM.
What heads? It has been rumored that some aftermarket heads don't quite fit up well on some aftermarket blocks. I saw photos of one such setup where the holes in the deck were not even covered by the heads, but that was a Brodix/Dart combination, IIRC. Too bad the search is dead - It wasn't that long ago.
Thread Starter
Supreme Member

Joined: Aug 1999
Posts: 2,441
Likes: 1
From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Heads are Jegs 197cc ( yes small I know will update to AFR210cc when I have the $$$)
Hopefully I will drain the coolant today and lift the intake of ad see what it looks like underneath...
To be continued...............
/N.
Hopefully I will drain the coolant today and lift the intake of ad see what it looks like underneath...
To be continued...............
/N.
Thread Starter
Supreme Member

Joined: Aug 1999
Posts: 2,441
Likes: 1
From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Update... to keep the thread alive
Pulled the oil plug and let the oil out.
Pressureized the system and squized the raditor hose and after a while antifreeze was dripping from the oilplug, so there is def a leak.
Drained the system yesterday and will hopefully lift the intake today.
/N.
Pulled the oil plug and let the oil out.
Pressureized the system and squized the raditor hose and after a while antifreeze was dripping from the oilplug, so there is def a leak.
Drained the system yesterday and will hopefully lift the intake today.
/N.
Thread Starter
Supreme Member

Joined: Aug 1999
Posts: 2,441
Likes: 1
From: sweden
Car: GTA -89
Engine: Blown 415"
Transmission: 4L80E
Axle/Gears: Strange 12-bolt
Pulled the intake today and I didnt see any "Pure" antifreeze floating around so I guess the leak have to be in the heads/block or?
Next step?
1. Should I pull the heads?
2. Fill it up with water and block of the heads and pressurize the system again to see if I get any clues?
/N.
Next step?
1. Should I pull the heads?
2. Fill it up with water and block of the heads and pressurize the system again to see if I get any clues?
/N.
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