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Old 02-17-2012, 04:10 PM   #1
CAPTAIN1N5ANO
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Default Sti Headgaskets On 2.5rs??

I have a 2001 2.5rs that the headgaskets were done 30K ago and are already leaking. Can I use headgaskets from a newer 2.5 turbo and will they last longer?? I had thought someone said this can be done. Thanks for the help.
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Old 02-17-2012, 04:23 PM   #2
AliBenn
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i heard of it
here is my thread on the topic:

http://forums.nasioc.com/forums/show...5#post35281725
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Old 02-17-2012, 08:17 PM   #3
05-rsx
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Just did both HGs on my 05RS (251 here in Aus) with 642s (STi HGs). No installation dramas. As far as how it runs - so far, so good.

They're 0.1mm thinner a side, which shouldn't cause an issue; after speaking to my mechanic (who has been working on Subarus for 25+years) he said you are doing well to get interference on the SOHCs.

Don't forget to have your heads machined - it will save you doing it again in the near future.
Whilst the engine is you also a good time to check (and replace if need be) timing belt, rocker cover gasket (I think that needs to be done anyway), spark plug seals, idler pulleys, clutch (I did the latter 4, the TB had only been done 2 years ago)
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Old 02-17-2012, 09:08 PM   #4
rhino6303
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Yea it works. I have them on my 2005 obs. Have your heads machined and be sure that all surfaces are perfectly flat and clean. Use the gaskets that end in 642. Enjoy!
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Old 02-17-2012, 09:35 PM   #5
Bluefoton
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exacty what the two posters above said. Did the same thing. Your CR is raised by 0.1 which in theory yields an extra 1hp as well
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Old 02-17-2012, 10:37 PM   #6
jamal
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yes absolutely use sti headgaskets on a 99-01 RS. 11044AA642

I can't believe the dealership still puts in POS graphite coated gaskets. Up until 09 only the phase 1 2.5 n/a motors got mls gaskets for some reason.
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Old 02-18-2012, 08:41 AM   #7
GrundleJuice
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Quote:
Originally Posted by jamal
yes absolutely use sti headgaskets on a 99-01 RS. 11044AA642

I can't believe the dealership still puts in POS graphite coated gaskets. Up until 09 only the phase 1 2.5 n/a motors got mls gaskets for some reason.
My 07 has MLS head gasket from the factory.
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Old 02-19-2012, 01:33 AM   #8
Bluefoton
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^ do you have the part nr? Curious to see when they changed..
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