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> Changed Head Now Vibration? Any Ideas?
jpl202
post Aug 19 2008, 08:33 PM
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I just got done putting a rebuilt head and timing belt on my 1995 GST. I did not change the balance shaft belt because it was changed not to long ago.

Once I put everything back together and the motor mount back on, the car seems to vibrate more than it use to at idle. It is not to horrible but noticable to me. The timing is dead on. What can cause vibration at idle? Motor mounts? Any ideas will help.

Thanks, John
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jonbonazza
post Aug 19 2008, 08:59 PM
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sounds like you didnt secure your motor mounts well enough to me.
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pwee05
post Aug 20 2008, 06:02 AM
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Drives: 1996 Talon AWD. Built, but no longer drives: 1997 mitsubishi eclipse RS; 1990 Talon AWD; 1995 Talon AWD, 1997 Talon AWD. Seems like a pattern
does the rebuilt head have larger cams?
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jpl202
post Aug 20 2008, 06:38 AM
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Motor mounts are very tight and it is the same cams as the old head.
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pwee05
post Aug 20 2008, 07:39 AM
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Drives: 1996 Talon AWD. Built, but no longer drives: 1997 mitsubishi eclipse RS; 1990 Talon AWD; 1995 Talon AWD, 1997 Talon AWD. Seems like a pattern
check for a vacuum leak
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jpl202
post Aug 20 2008, 08:10 AM
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Where is the most common spot for a vaccum leak on these engines?
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pwee05
post Aug 20 2008, 08:34 AM
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throttle body or cracked/popped off vacuum line.

did you change your plugs and wires with the head?
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jonbonazza
post Aug 20 2008, 11:45 AM
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QUOTE(pwee05 @ Aug 20 2008, 09:34 AM)
throttle body or cracked/popped off vacuum line.

did you change your plugs and wires with the head?
[right][snapback]195904[/snapback][/right]


yea i was gonna say a major mis-fire could cause that also.
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4G63Attack
post Aug 20 2008, 12:42 PM
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[SIZE=14]WRONG!!!!!!![SIZE=14]

your rear balance shaft is 180 the wrong way thats why its vibrating
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HMatt
post Aug 20 2008, 04:28 PM
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You are talking about the one that the oil pump runs off of right? The one that is turned by the timing belt, not the "balance shaft belt".

That makes perfect sence. I was going to say the balance shaft is off until he said he didn't mess with that belt. I completely forgot about the rear shaft.
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4G63Attack
post Aug 21 2008, 02:20 AM
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will you have two balance shaft one in front and rear. the front is the oil pump and front b/s. timing belt has the rear.
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jpl202
post Aug 23 2008, 09:23 PM
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I had those marks aligned on the oil pump w+hen I installed the timing belt. I am 100% on that.
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pwee05
post Aug 25 2008, 07:53 AM
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Drives: 1996 Talon AWD. Built, but no longer drives: 1997 mitsubishi eclipse RS; 1990 Talon AWD; 1995 Talon AWD, 1997 Talon AWD. Seems like a pattern
silly question, but i've done it before, did you plug your MAF sensor back in?
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pmaniac69
post Aug 28 2008, 11:08 PM
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you might of had the timing mark lined up, but it can still be 180 degrees out, I think the factory service manual says to take a phillps screwdriver and stick it in the plug hole and it need to go in more than 2 1/2 inches, if it doesn't, than its out 180
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jpl202
post Aug 29 2008, 12:19 PM
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I looked for this plug hole. Where is it located. I can't seem to find it. Is it on the oil pump sproket near the arrow?

Can you check it when everything is back together?

Thanks
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