Oil leak under the engine belt - Toyota Celica Forum
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post #1 of 4 (permalink) Old 07-13-2016, 05:15 PM Thread Starter
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Default Oil leak under the engine belt

So I discovered a slow oil leak on my 2003 GT-S and after replacing the oil pan gasket and pcv valve (which we though was the issue) it's still leaking.

It's definitely coming from the side next to the belt assembly. At first rough glance it doesn't SEEM to be coming from the crankshaft pully (not ruling it out though).

The oil is dripping from just barely behind the pulleys onto the splash sheild by the wheel well. Maybe leaves a half dollar sized spot after 12-ish hours. Anyone have a better clue as to what the deal is?!?
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post #2 of 4 (permalink) Old 06-26-2018, 03:37 PM
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valve cover gasket sounds like..
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post #3 of 4 (permalink) Old 06-27-2018, 01:59 PM
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Yeah, sounds like the valve cover gasket. When I recently removed mine to replace my spark plugs, I saw a greasy mess around it. You might want to see if it's got oil on the ends of the coil pack tubes as well.

You have more talent in one lug nut than a lot of cars have in their whole body. But you're stupid.

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post #4 of 4 (permalink) Old 05-04-2019, 04:14 AM
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It could be leaks out of the timing chain tensioner, held in behind the block with 2 10 mm nuts. Take a paper towel and wipe the area below the tensioner to see if there is any oil.

It could be leaks from the front engine seal. To fix take out the belt, crank pulley ect, remove the front cover and reseal with automobile-grade high temp silicone.

You should have someone degrease the engine top and bottom, run engine until hot, then put the car on lift to look from underneath. Then you can find out exactly where the leaks are.
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