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Oil sludge

94SVR

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Hey everyone,

Just recently i replaced the intake manifold gasket on my VR commodore V6, and realised the rubber gaskets had split due to me overtightening them or fitting them improperly, so once again i pulled off the intake manifold only to find a build up of oil sludge that wasnt there last time, so i cleaned it all out and properly re-fitted the gaskets and manifold, flushed the engine, new oil and filter in the car, im hoping the sludge build up was from the leaking manifold gasket, and the rocker covers also have sludge on the inside, could there be any other reasons for the fast build up of sludge?
 
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hako

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I'm only guessing but I'd imagine that sludge would form/condense more quickly during the cooler months. Also, the inlet manifold is made of aluminium alloy and is fairly cool due to the air passing thru it making it ideal for sludge formation.
The rocker covers are plastic or non-metal and do not encourage sludge formation due to their low heat conductivity - they heat up quickly and this discourages the formation of sludge. Sound good?
 

bradcad

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not entirely sure...

but use a high detergent oil as sludge is one of your worst enemies
 

94SVR

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Thanks for the help
 

Matty081

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simple but won't hurt to ask....
this sludge...it's not "milky" is it?
 

94SVR

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the sludge was a creamy whiteish colour, ive checked the oil several times and it hasnt affected the colour or how the oil feels
 

bradcad

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Well, sounds like you've got water in the oil..
 

Matty081

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BINGO
clean out as much as possible ASAP before your motor starts to rust internally
 

94SVR

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what would be the best way to clean it out
 

immortality

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sounds like some water got into the oil throught the bad gasket, get some engine flush and follow the instructions but generally it goes something like,

with the engine up to running temp add the flush and leave it idling for 10 mins, stop and drain immediatly and complete oil change + new filter.(do not drive whilst engine flush is in the engine)

check the oil daily for a week and if you see any milky stuff complete above again.

if you continue to get the milky oil you still have a problem somewhere!!!:bang:
 
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