My idle saga continues...
#1
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I think I figured out what was wrong, Someone with better knowledge than me confirm that this is right eh?
Anyway, The car would idle very roughly, Almost like a mild cam. I replaced plugs and wires, All new vacuum lines, LIM Gaskets, O2 Sensor and cleaned the LIM and UIM. Nothing seemed to help. So today I was checking my compression (I got 160'* on all) and I figured WTH I ought to just pull a valve cover and see if I can notice anything out of place. Popped off the rear one so it would serve a dual purpose and I could clean it. Three of my rockers were loose, Like I could move them side to side, up and down, the whole nine yards. I popped the exhaust rockers off so dad could use his little thingy to check my valve springs. My springs checked out okay against factory spec. Not like I really have that tight of a grip on that concept anyway... But when I put the rockers back I tightened them to factory spec and noticed they were very tight and I couldn't move them. I'm just going to guess that'* the way they should be. Now, When I started up the motor it idles almost perfectly now, Like it'* a serious improvement, You can't hear the car inside the house anymore, It'* really nice.
Now guys, I'm wondering if that was the problem and if I should retighten the ones I didn't tighten on the back bank and tighten them all on the front bank. What do you guys think?
Thanks in advance
Anyway, The car would idle very roughly, Almost like a mild cam. I replaced plugs and wires, All new vacuum lines, LIM Gaskets, O2 Sensor and cleaned the LIM and UIM. Nothing seemed to help. So today I was checking my compression (I got 160'* on all) and I figured WTH I ought to just pull a valve cover and see if I can notice anything out of place. Popped off the rear one so it would serve a dual purpose and I could clean it. Three of my rockers were loose, Like I could move them side to side, up and down, the whole nine yards. I popped the exhaust rockers off so dad could use his little thingy to check my valve springs. My springs checked out okay against factory spec. Not like I really have that tight of a grip on that concept anyway... But when I put the rockers back I tightened them to factory spec and noticed they were very tight and I couldn't move them. I'm just going to guess that'* the way they should be. Now, When I started up the motor it idles almost perfectly now, Like it'* a serious improvement, You can't hear the car inside the house anymore, It'* really nice.
Now guys, I'm wondering if that was the problem and if I should retighten the ones I didn't tighten on the back bank and tighten them all on the front bank. What do you guys think?
Thanks in advance
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#2
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I don't have the answer to your question, but I do have another one:
Did you hear any "chatter" from the rockers being loose? I'm very interested in the answers you get on this. Wierd stuff.
Did you hear any "chatter" from the rockers being loose? I'm very interested in the answers you get on this. Wierd stuff.
#3
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Just a very low pitched bump when the engine was winding down, And I could only hear it with a stethoscope. It seems to have decreased in both volume and frequency.
#4
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me: Re-torque ALL rockers. Front and rear.
me: Loosen, then re-torque, in 2 stages. specs in techinfo.
damemorder: specs in the book
damemorder: I was guessing I should do that, but are the bolt torque to yeild?
me: The rear is more likely to be loose, but check the front anyway.
damemorder: Should I clean the rockers whilt I have them out?
me: I don't think the rocker bolts are. If they say to torque a certain amount, then another certain number of degrees, they are.
me: No, don't bother cleaning them. No benefit.
me: Leave the glaze.
me: Rear is more likely to be loose from extreme temp cycling because of the firewall/rear exhaust.
me: You got that TTY, ?
me: Any time it calls for more angle after a certain torque, they're TTY.
me: How'* your valve cover seals?
damemorder: oh, okay, Good to know.
me: Loosen, then re-torque, in 2 stages. specs in techinfo.
damemorder: specs in the book
damemorder: I was guessing I should do that, but are the bolt torque to yeild?
me: The rear is more likely to be loose, but check the front anyway.
damemorder: Should I clean the rockers whilt I have them out?
me: I don't think the rocker bolts are. If they say to torque a certain amount, then another certain number of degrees, they are.
me: No, don't bother cleaning them. No benefit.
me: Leave the glaze.
me: Rear is more likely to be loose from extreme temp cycling because of the firewall/rear exhaust.
me: You got that TTY, ?
me: Any time it calls for more angle after a certain torque, they're TTY.
me: How'* your valve cover seals?
damemorder: oh, okay, Good to know.
#5
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Dont forget lock-tite!! both factory and aftermarket rocker bolts come with lock-tite.
And you always check all the bolts if you find one loose, the rest are just as old.
And you always check all the bolts if you find one loose, the rest are just as old.
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