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Old 12-31-2012, 12:19 AM   #1
CZBugeye2002
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So I just picked up my 2004 forester xt block and heads from the machine shop, reassembled everything, and I am getting zero vacuum at a very poor idle and I'm unable to rev the motor above about 800 rpm. No cel's. So I'm thinking its a large vacuum leak, (which I've already checked for once), or as the title states, is it possible that the machine shop guy switched the intake cams on accident? I know the cam lobes are the same, but I am curious as to the lobe relation to the alignment pin for the cam gear. Is that the same on both? Any help is greatly appreciated. Thanks
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Old 12-31-2012, 08:56 AM   #2
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Bump????
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Old 12-31-2012, 09:37 AM   #3
tunertype
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It'd be alot more likely that you messed up the timing when you installed the heads.
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Old 12-31-2012, 09:58 AM   #4
CZBugeye2002
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I've redone the timing belt three time, (I'm very fast at it now haha) and it is dead on for sure..... I'm going to try a smoke test today and see if there are any vacuum leaks. I still wonder about the possibility of switching those cams??
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Old 12-31-2012, 10:12 AM   #5
WRXSteye20008
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Might as well trying filling out your profile followed by a compression and leakdown test as well since you will be poking around the engine anyway.
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Old 12-31-2012, 05:09 PM   #6
CZBugeye2002
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Well I smoke tested the intake and there are no leaks. So, back to the original question, is it possible to install the cams in the wrong head? I'm about to do a compression check.
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Old 12-31-2012, 05:28 PM   #7
jvallepu
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It's possible you got the buckets or shims mixed up? But a compression test will give you an answer.
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Old 12-31-2012, 05:36 PM   #8
CZBugeye2002
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No the valve lash was set and the heads rebuilt and very clearly marked. I guess if my compression test is low in all cylinders, the only answer is mixed up cams??
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Old 12-31-2012, 07:44 PM   #9
jvallepu
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Way don't you just open one valve cover and see if the cams are mixed up they are labeled in the middle if its intake it has an "i" followed by other characters that tell you which head it goes on. Or compression test lol but if u know you could of missed it up I would just open a valve cover.
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Old 12-31-2012, 08:41 PM   #10
CZBugeye2002
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That's what I plan to do. I just couldn't remember if they were marked at all.
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Old 01-01-2013, 03:21 AM   #11
WRXSteye20008
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Fill out your profile
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Old 01-01-2013, 12:17 PM   #12
tunertype
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Could be head gasket. Could be w faulty gasket or improper torque/procedure. Compression test could tell.
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Old 01-01-2013, 03:47 PM   #13
CZBugeye2002
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Looks to be the head gaskets. Installed cometics with new oem bolts, but they don't seem to have had enough clamping pressure to close up the gaskets fully. Head was surfaced and deck was checked at the machine shop, so mating surfaces were not the problem. I'm going to arp studs.
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Old 01-01-2013, 03:48 PM   #14
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I should say I guess I had 90-95 psi on all cylinders.
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