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Old 02-15-2013, 10:03 AM
johnfischer johnfischer is offline
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Default New Head gasket, New Noise

Thank God it's Friday!

Specs: '99 2WD V6 3.0l 104,000mi

I just replaced both head gaskets and timing case gasket (but not the timing chain/sprocket). (and all the other gaskets that go along with the job.)

The engine runs great now....but has one NEW issue. I've got a tapping noise coming from the passenger side valve cover. Well ok, not the cover it self but from the valves. I put each push rod back in it's respective location that it came from so I'm not sure what would be tapping. I didn't touch the timing chain or sprocket (unless a squirrel got in one night).

I'm thinking stuck valve or something but not sure. So before I go and tear it up again, I thought I'd ask for some opinions.
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Old 02-15-2013, 10:09 AM
Prages Prages is offline
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Default Re: New Head gasket, New Noise

You're sure you got all the rockers torqued down right?

That #3 push rod that goes through the intake manifold screwed me up on my motor swap. I bought a crate motor, but had to take the #3 push rod out to get the intake on. The motor was on a stand when we did that, and between the time we put it back together and the time we rechecked the torque, we'd spun the engine stand around, so my #3 rocker was only hand tight. Worked fine for about 20 miles, then worked loose enough that it sounded like a stuck valve. Popped the valve cover off, torqued #3 rocker arm, and all is well.
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Old 02-15-2013, 10:31 AM
johnfischer johnfischer is offline
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That was my first thought. I followed the torque specs from the manual, but I suppose it's possible that I applied the wrong/no torque to it.
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Old 02-15-2013, 10:55 AM
Rangerman49 Rangerman49 is offline
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Default Re: New Head gasket, New Noise

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Originally Posted by johnfischer View Post
That was my first thought. I followed the torque specs from the manual, but I suppose it's possible that I applied the wrong/no torque to it.
Yeah, I'm thinking rockers too. Bring each cylinder up to TDC compression so that tension is off the rockers and then torque them down again.
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Torque it down till it breaks off, then back it off 1/4 turn.
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Old 02-15-2013, 11:09 AM
johnfischer johnfischer is offline
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Ok, I'll try that.
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Old 02-15-2013, 03:43 PM
rangerlocal rangerlocal is offline
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Default Re: New Head gasket, New Noise

That's one great thing about these archaic pushrod engines...they let you know when something is loose and don't fly apart in the process. Have a late model Chevy Nova with the old GM 250 I6. Love that motor, you can figure out 90% of problems just by listening to it.
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Old 02-20-2013, 01:12 PM
johnfischer johnfischer is offline
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Default Re: New Head gasket, New Noise

Well, good news, not terrible news.

Good news:
I re torqued all the rocker arms at TDC on the compression stroke and most of the noise is gone.

I've been had:

Although as I pulled forward out of my parking spot I knew my fellow class mates had gotten to my truck. We were going to dump a big box of packing peanuts into some one's car this afternoon, but they were all locked. So when class was out, they put a big black zip tie around my drive shaft...thwack thwack thwack....

Not bad news:

The noise is "moslty" gone, but it's still there. Now I didn't use a micrometer on the push rods, although I should have when they were out, so I can't say whether or not the push rods have been worn out of limits. So once it warms up here I'll take it all back apart and measure the push rod on the valve that's been acting up.
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Old 02-20-2013, 05:05 PM
Prages Prages is offline
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Default Re: New Head gasket, New Noise

Well, that's kinda good news anyway.
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Old 02-20-2013, 05:59 PM
jester03 jester03 is offline
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Did you oil them down good when you put them in. Ik they like to rattle if they aren't oiled good my dad had that problem when the people who changed his oil didn't put enough oil back in it
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Old 03-31-2013, 11:03 PM
johnfischer johnfischer is offline
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Ok so good news bad news. I not only had a tapping sound but a coolant consumption problem as well. Turns out I need to replace the lifters and the cylinder heads as well. I not only had a blown gasket but a cracked valve guide as well. It's getting warmer and I'm feeling like working on it again. Updates to come.
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Old 04-01-2013, 03:25 PM
rangerlocal rangerlocal is offline
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Default Re: New Head gasket, New Noise

Sorry to hear that. Sometimes it happens, even on things that are nearly indestructible. Keep us posted.
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Old 04-01-2013, 03:36 PM
johnfischer johnfischer is offline
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Yeah I'm getting ready to order parts in the next day or two.
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3.0l v6, new head gasket, valve noise, valve tapping

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