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Another Volvo quest. cont.

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northernaircraftmaintenance

New member
Since my last post I have purchased a used servicable oil cooler which has solved the problem of draining oil overboard.
To refresh all of your memories I have a early 70's 19' Reinell Volvo AQ130c engine with a 270 outdrive.
My problem is that I am still getting water in the oil. I have not had it back on the lake yet, just testing it in the shop. Engine cold, just running water through it. My understanding is that when the engine is cold, the thermistat is closed and bypassis the water out the ex manifold.
Is it possible to leak this water from the ex into the oil pan ?
Is there a way I can pressure check each side of things to figure out where I might be leaking water into the case ?
Any help is still appreciated!!!

Thanks Rob
 
Water in oil?
Double check your raw water (impeller) pump.
If shaft seals are leaking, engine gets filled with water.
 
Were you the one who was looking to either over-haul or replace your oil cooler?
If so, what all did you do/how far did you get with that?
That is a very likely area for water to enter your oil if corroded and/or if the O-rings have failed.

Exhaust man, I'd say unlikely without other tell tale signs.

As for the sea water pump.... it is driven from the front of the counter-shaft on this engine.
The pump does have a seal in it...... Likewise does the front of the counter-shaft.
Both would need to fail, and water would need to somehow stream into the drive unit seal (IMO) for this to be a likely place for water intrusion! Again, IMO.

Eduardo would be a better one for this question!

.
 
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As far as the oil cooler goes, Mine was definately shot, but oil pressure is greater than water pressure and only explained why I was pumping oil overboard. I have bought a replacement from ebay and have pressure checked it ( all Good ) But at the present time I have bypassed it and am still getting water in the oil. ( Engine cold, Garden hose connected to Ex Manifold inlet, 1 Qt. water in oil pan / half hour )
 
re: "Garden hose connected to Ex Manifold inlet,"

I'm not a big fan of EVER having water enter an engine other than as sucked in by the water pump without any other help... this includes "ears"

Whether the water inlet is thru the drive or thru hull, I ALWAYS arrange it so that the engine's water pump draws water in at its own rate and pressure from a pail with a free running hose in it.

Given a choice of drinking a glass of water with a straw or having someone shove the spray hose attachment from your sink in your mouth and sealing it with your lips...which would you pick?
 
Lift out the engine, pull the oil pan and see where the water is coming from.
If no water in cylinder, probably a cracked water jacket below piston tops.
 
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