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87-740 Where is this oiling leaking from?

posted by  Larue on  Mon Jun 27 23:48 CST 2011
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last visit: Sun Mar 30 17:46 CST 2014
[RELATED]

The leak appears to come from where the timing cover, block and head come together on the drivers side of the engine. It looks like it could be coming from the seam between the block and head. I would say its a small leak. After 50 miles of highway driving a tiny stream will have formed along the passenger side of the block, right behind where the distributor on a 240 would be.
I removed the top timing cover and pulled the back half of the timing cover as far away from the head as it would go and checked around the cam seal and saw no obvious leaking from there. I also checked the valve cover gasket and found no leaks. How likely is this leak to be coming from the block?

If it is coming from the block, what would be the best action to take?


The car has just past 250,000 miles. The car starts, idles and runs fine. There is no oil in the coolant , nor coolant in the oil that i can see. The temp guage is always dead center. Recent compression test gave me 180 across all cylinders.

Had a recent problem with coolant spewing out of the reservoir, but resolved by changing the cap and lowering the coolant level. There hasnt been a repeat of that. Also recently cleaned the pcv system, including removing and giving a thorough cleaning to the oil separator. I still get a little oil leaking from the(after market) oil filler cap, but just a slight bit.


Thanks





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