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02-07-2013, 01:27 AM | #26 | |
Scooby Guru
Member#: 71875
Join Date: Oct 2004
Location: Montana
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Quote:
Phase 2 sohc to somewhere around 08-09 should use -642, which is the 04-06 turbo gasket. So that includes the 251 and 253 I think. 09 ish and up already have the -770 MLS gasket in them, which is the same thickness as 642 but has different cooling passages. I think the change was whenever they started putting avcs or avls or whatever it is on the n/a 2.5s.
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02-07-2013, 11:50 AM | #27 |
Scooby Specialist
Member#: 73636
Join Date: Nov 2004
Chapter/Region:
E. Canada
Location: the 'wa, ontario, canada
Vehicle:2017 WRX base Urban Grey |
I believe that year would've been 05 in USDM, if not 06 for sure.
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02-09-2013, 01:02 PM | #28 |
Scooby Guru
Member#: 141373
Join Date: Feb 2007
Chapter/Region:
E. Canada
Location: Quebec, QC
Vehicle:2022 Crosstrek Sport 6MT |
Aren't coolant passages supposed to match the holes in the head/block? If the head design didn't change in between 07-08-09, why would the HG differ?
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02-09-2013, 02:16 PM | #29 |
Scooby Guru
Member#: 71875
Join Date: Oct 2004
Location: Montana
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Yeah, the head design did change. If avcs was added in 05-06 I guess that's not when it was, but I remember seeing an 09 or '10 outback with the new -770 gaskets.
There's a picture of it here: http://forums.nasioc.com/forums/show....php?t=2155089 |
02-12-2013, 10:30 PM | #30 | |
Scooby Newbie
Member#: 144605
Join Date: Mar 2007
Chapter/Region:
BAIC
Vehicle:2007 2.5i Wagon Satin White Pearl |
Quote:
I need to replace my valve cover gaskets and I am not excited to install the same ones that failed after 60-90k... Last edited by cdwahl; 02-12-2013 at 10:31 PM. Reason: typos... |
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02-13-2013, 12:36 AM | #31 |
Scooby Newbie
Member#: 181314
Join Date: May 2008
Chapter/Region:
NWIC
Location: SW Washington
Vehicle:2005 Impreza OBS SRR 05 Legacy GT RBP |
The valve cover gaskets are not steel. So you can't get any mls valve cover gaskets. The oem ones work fine as long as you follow the fsm and also make sure all surfaces are clean when installing.
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02-13-2013, 10:35 PM | #32 |
Scooby Newbie
Member#: 144605
Join Date: Mar 2007
Chapter/Region:
BAIC
Vehicle:2007 2.5i Wagon Satin White Pearl |
So you think that they failed because they weren't installed properly at the factory?
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02-14-2013, 12:26 AM | #33 |
Scooby Newbie
Member#: 181314
Join Date: May 2008
Chapter/Region:
NWIC
Location: SW Washington
Vehicle:2005 Impreza OBS SRR 05 Legacy GT RBP |
They are a wear item. Getting 90k out of the valve cover gaskets is great.
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02-17-2013, 10:36 AM | #34 |
Scooby Newbie
Member#: 104702
Join Date: Jan 2006
Location: South Eastern CT
Vehicle:95 Legacy Green |
So has anyone used the 11044AA642 (MLS) gaskets on an 2.5 NA? Specifically, for a 2002 engine.
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02-17-2013, 11:32 AM | #35 |
Scooby Newbie
Member#: 181314
Join Date: May 2008
Chapter/Region:
NWIC
Location: SW Washington
Vehicle:2005 Impreza OBS SRR 05 Legacy GT RBP |
Yes. It has been done a lot on 2.5 n/a motors all the way up until they changed the coolant chamber designs.
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02-17-2013, 12:11 PM | #36 |
Scooby Newbie
Member#: 333084
Join Date: Sep 2012
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how much is compression is effected
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02-17-2013, 12:43 PM | #37 |
Scooby Guru
Member#: 141373
Join Date: Feb 2007
Chapter/Region:
E. Canada
Location: Quebec, QC
Vehicle:2022 Crosstrek Sport 6MT |
0.1 increase in CR
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