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Guest Message by DevFuse

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Replaced head gaskets now oil leaking from crankcase seal

What needs fixed?

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4 replies to this topic

#1 gsac132


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  • pleasant gap,PA

Posted 28 April 2014 - 11:42 AM

My 99 forester just had head gaskets replaced and now there's an oil leak coming from the crankshaft seal on the front of the engine.How difficult is this to change and what other things should I be looking for?its a 2.5 s.o.h.c engine

#2 nipper


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Posted 29 April 2014 - 10:06 PM

You just learned a lesson the hard way. When you have the front of the engine apart replace all the seals. Usually if the seals havent been replaced, the timing belt idlers havent been changed.


Normally you would do cam seals (check to see if they were replaced), main seal, re-seal the oil pump, replace the water pump, idlers and the belt. You have to go over your HG list and see what was replaced and what wasnt and act accordingly. If in doubt replace it. Also replace the PCV valve, and generally a good idea to change the oil after a HG replacement if the engine ran hot. Also the car is old enough for a new OE thermostat and a radiator cap (any mfg).

#3 gsac132


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Posted 05 May 2014 - 02:25 PM

I went back inthere and replaced the seals and no more leaks as of now,timing belt was done 40,000 ago so i left it alone looked to be in good condition i now have a p0420 code to diagnose

#4 86 Wonder Wedge

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Posted 06 May 2014 - 10:59 AM

Were you burning coolant before the HGs were replaced?

#5 johnceggleston


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Posted 06 May 2014 - 01:09 PM

i now have a p0420 code to diagnose

this is usually an o2 sensor issue.

but there can be lots of different causes, including an intake leak.


there is a great posting over on the outback forum about htis.

extremely informative.



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