S90 Camshaft Seal, Exhaust Side Leaks - Volvo Forums - Volvo Enthusiasts Forum


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Old 09-28-2010, 09:30 AM
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Default S90 Camshaft Seal, Exhaust Side Leaks

Worked all weekend and replaced my camshaft seals on my 98 S90. All for not, still leaking oil. Is it possible to swap end cap for cam position sensor?
I am already grey but I will be bald at the end. S90 has 126k miles on her.

Also does the Air Pump energized as soon as car starts or does it energize at a certain RPM?

Thanks All in advance.
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Old 09-28-2010, 10:48 PM
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Air pump kicks in on cold start for about 1 minute then goes off. They do go out a lot on these cars at this age. I think I found a filter on the back of mine but could not replace it.

No clue about the cam shaft sensor.
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Old 10-24-2010, 03:39 PM
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How many miles on your S90?
In the case of my S90, the leak was coming from between the head and the block; front side of engine. I have NOT seen one S90 leaking from the valve cover. I also had a broken Cam Sensor and it never leak oil from there. Remove your timing belt cover, you will see where the leak starts. All that front area is cover with oil and is bad for your timing belt. There is no cap on the Cam sensor. This sensor is a single unit and you can not swap them. As for the air pump, it should start quick for 1 to 2 minutes longer if the engine and weather is cold. Had you had a head job done on his car? if so you mechanic did not seal or torque the head correctly.
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