water in oil, compression test question
10-10-2008 | 02:34 PM
#11
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
Pull the riser off the manifold and see if there's water in the ports, usually in the two center ports. Next, take the manifolds off and pressure check them.
If you don't see any water in the manifold it's either a head gasket leaking into the engine, cracked head/block, oil cooler, intake manifold and a few other things I'm probably forgetting.
As far as the oil, I've had good luck pumping the old oil out and replacing it with a light weight 10W/30 and run it on the hose for 15 minutes, then do another oil change and let it run on the hose for 30 minutes at 1500 rpms. Once that's done change the oil again but this time use regular oil, not the thin stuff...and take it for a 1 hr. cruise and the rest of the moisture should be evaporated......that is if you figured out where the water leak was coming from...
If you don't see any water in the manifold it's either a head gasket leaking into the engine, cracked head/block, oil cooler, intake manifold and a few other things I'm probably forgetting.
As far as the oil, I've had good luck pumping the old oil out and replacing it with a light weight 10W/30 and run it on the hose for 15 minutes, then do another oil change and let it run on the hose for 30 minutes at 1500 rpms. Once that's done change the oil again but this time use regular oil, not the thin stuff...and take it for a 1 hr. cruise and the rest of the moisture should be evaporated......that is if you figured out where the water leak was coming from...
10-10-2008 | 09:39 PM
#12
Charter Member
Joined: Nov 2000
Posts: 1,094
Likes: 0
From: Lake Charles, LA USA
That is only 1 way water can leak out of a head gasket into the motor. If you leak down or check compression and the numbers come out OK it does not mean the head gasket is OK.
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03-23-2009 | 09:53 PM
#14
Registered
Joined: Jun 2006
Posts: 14,914
Likes: 1
From: Lake Conroe, TX.
yah the motor is old, it was supposedly rebuilt in 2005, but the intake manifold dosnt look to be in the greatest shape so im wondering if the gasket isnt bad, and who knows possible the headgasket as well.. im also thinking of replacing the exhaust manifolds and risers too. that way i know what kinda work went into the motor this time around.
