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Old 11-27-2011, 01:33 PM   #1
gf8love
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Default valvelash...?

Just finished putting my ej20g together yesterday took it out for her madden voyage and the car was running fairly well. It was doing all the thing its supposed to and barely any valvetrain ticking. Once the engine was warm I did a mild pull and the check engine light popped and the ecu started power cutting at 4k. When I got home I shut it down checked under the hood and what not. When I started it back up there was an excessively loud tick coming from the right head (the one I just rebuilt), and when I say excessive I mean I am able to hear it over my loud exhaust...any ideas?
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Old 11-27-2011, 03:29 PM   #2
baldingtires
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Pull the valve cover. It might be a very loose valve adjustment nut. Mine actually fell off.

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Old 11-28-2011, 12:17 PM   #3
gf8love
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Quote:
Originally Posted by baldingtires
Pull the valve cover. It might be a very loose valve adjustment nut. Mine actually fell off.

Video Link: http://youtu.be/No7qwm5x2N0
Wow mine sounds just like that...so what do you mean by valve adjusting nut?
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Old 11-28-2011, 07:19 PM   #4
gf8love
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Quote:
Originally Posted by baldingtires
Pull the valve cover. It might be a very loose valve adjustment nut. Mine actually fell off.

Video Link: http://youtu.be/No7qwm5x2N0
Wait a second I just realized that's a sohc in the vid and mines a dohc meaning I don't have those adjuster nuts I have shims
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Old 11-28-2011, 09:21 PM   #5
RallyColtTurbo
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What year and model EJ20G?

Early Legacy units have a stub rocker arm and a standard hydraulic lash adjuster. These can be removed and cleaned, or replaced with USDM '90-'94 SOHC Legacy HLAs.

Early Impreza EJ20Gs have a HLA bucket, this can be replaced with the USDM part for a '96 Legacy or Outback with the 2.5 motor.

Later Impreza and Forester EJ20Gs have a adjuster shim that can be reshimmed using '97-'99 Legacy 2.5 parts.
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Old 11-29-2011, 01:31 PM   #6
gf8love
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It is a Version 4 so 97-98 ej20g dohc with lifters and shims...My shims were close to spec with my intakes being .18-.20 mm and my exhaust being .25 mm...this is the second time i have put the engine back together the first time all four intake valves were bent the first time I started it up and I am still unsure why they bent. My shims were in spec the only thing i can think is that the machine shop i used put the wrong valves in but that wouldnt make since because my the buckets and shims would have been all out of whack. The second time i put it back together i used the 97-98 ej25 dohc that (marnix) said would work for my engine, measured all the shims to spec and put it back together (two days ago). Now for what ever reason its ticking loudly and cutting power at 4k and it seems to me like it has a dead cylinder due to the sound of the engine and the general shake the engine gives off when idling and at shut off. I guess my question at this point is what is causing these bent valves?
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Old 11-29-2011, 10:03 PM   #7
gf8love
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Update: did a compression test today. Good compression in all cylinders and while I was at it I thought I would rule out the possibility of an exhaust leak which it was not. Has anybody ever heard of or had a shim break or come out of the bucket? Seems unlikely to me but I suppose it could happen.
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Old 11-29-2011, 10:41 PM   #8
sorrowfulkiller
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yeas it can happen.
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Old 11-30-2011, 01:56 AM   #9
gf8love
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Yes to it can break or yes to they can fall out?
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Old 11-30-2011, 11:05 AM   #10
Marnix
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Yes they can wander around causing camlobe damage (seen it a few times) but only when you overrev the engine (+ 7k rpm). It's easy to check, just pull the valve covers and check if all shims are accounted for. While you're at it, measure valve clearances again (cold engine).
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Old 12-03-2011, 01:47 PM   #11
gf8love
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Quote:
Originally Posted by Marnix
Yes they can wander around causing camlobe damage (seen it a few times) but only when you overrev the engine (+ 7k rpm). It's easy to check, just pull the valve covers and check if all shims are accounted for. While you're at it, measure valve clearances again (cold engine).
Well had time to get into it and two of the shims came out. My only question is you say this can only happen when the engine over revs which did not happen in my case being it was the first drive. Also it did cause damage to the cam lobes but its not awful. It is okay to run the cams with the little bit of damage it has?
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Old 12-05-2011, 12:34 AM   #12
elislider
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its possible you put the shims back in the wrong spots and they were way too thin and just popped out. seems unlikely though
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Old 12-05-2011, 09:50 PM   #13
theonlygreat
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The cam lobes can be polished, then you just have to redo the shim measurements. What valve springs are you using?
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Old 12-06-2011, 01:33 AM   #14
gf8love
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Quote:
Originally Posted by elislider
its possible you put the shims back in the wrong spots and they were way too thin and just popped out. seems unlikely though
It's not possible because I measured them out and the clearance was too spec.. yes I was thinking of using emery cloth to polish and I am running 97-99 ej25 dohc valves
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