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Thread: Exhaust manifold was red hot!!??

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    Alex91Mk3's Avatar
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    Question Exhaust manifold was red hot!!??

    So I fnished putting back my GE after replacing the head gasket... The car was sitting for atleast 6 months... Anyways... so I'm driving it around the block for a few minutes... and I see a little bit of smoke coming out of the shifter area... I pull over in my house the exhaust manifold is red hot. I've never seen anything like that. So the question is: What would make my exchaust manifold glow red hot?????

    JDM GE and R-154 SWAP...its done...

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    Default Re: Exhaust manifold was red hot!!??

    Burnt valve?
    Clogged CAT?
    Timing is off?

    I see its NA so we can rule boost out of the equation

    Sam
    Single turbo 1JZ......Just the basics

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    Default Re: Exhaust manifold was red hot!!??

    Possibly something causing it to run lean, which boosts your EGT (Exhaust Gas Temperature) through the roof.

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    Default Re: Exhaust manifold was red hot!!??

    What grim said is absolutely correct, I'd say one of the most common of those is TIMING. Check yours or did you just tune the distributor by ear?

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    Default Re: Exhaust manifold was red hot!!??

    Quote Originally Posted by Alex91Mk3 View Post
    So the question is: What would make my exchaust manifold glow red hot?????
    I believe the most honest answer to his question is 'heat'.

    But in all seriousness, timing, fuel, clogged cat, could all be reasons for this. I wouldn't drive it until it's fixed though...
    -Brad
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    Default Re: Exhaust manifold was red hot!!??

    Run open headers and see if it does it again, or for a less obnoxious fix try this fun little equation 0*@TDC+T1m1ng gun.
    BTW, open headers would be to see if your cat is clogged.

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    Default Re: Exhaust manifold was red hot!!??

    Quote Originally Posted by 87M-GTE View Post
    Burnt valve?
    Clogged CAT?
    Timing is off?

    I see its NA so we can rule boost out of the equation

    Sam
    lol yeah no boost... and theres no cat.. just a testpipie.. i'm thinking it could be the timing as well..

    ---------- Post added at 02:47 AM ---------- Previous post was at 02:45 AM ----------

    Quote Originally Posted by GrimJack View Post
    Possibly something causing it to run lean, which boosts your EGT (Exhaust Gas Temperature) through the roof.
    I thought if it ran rich thats when it would burn hotter? lean would mean not enough gas and too much air no>?

    ---------- Post added at 02:49 AM ---------- Previous post was at 02:47 AM ----------

    Quote Originally Posted by whitemike View Post
    What grim said is absolutely correct, I'd say one of the most common of those is TIMING. Check yours or did you just tune the distributor by ear?
    lol yeah mike i kinda gotta admit I did it by ear..i guess i have to fix the timing. i never learned how to use a timing gun.

    ---------- Post added at 02:50 AM ---------- Previous post was at 02:49 AM ----------

    Quote Originally Posted by te72 View Post
    I believe the most honest answer to his question is 'heat'.

    But in all seriousness, timing, fuel, clogged cat, could all be reasons for this. I wouldn't drive it until it's fixed though...
    yeah im not driving it now.. you said fuel.. i had the fuel sitting in the tank for a couple months... you think that would make it go bad?

    ---------- Post added at 02:57 AM ---------- Previous post was at 02:50 AM ----------

    Quote Originally Posted by spikesnstuff0905 View Post
    Run open headers and see if it does it again, or for a less obnoxious fix try this fun little equation 0*@TDC+T1m1ng gun.
    BTW, open headers would be to see if your cat is clogged.
    i think your going to have to give me a break down of the mathematical equation.. i was never good at math.. fractions.. decibals.. etc. lol..

    JDM GE and R-154 SWAP...its done...

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    Default Re: Exhaust manifold was red hot!!??

    The timing gun is really simple. Connect it to the battery, and put the pickup over the #1 spark plug wire. Make sure the notch on the front main damper is visible - I tend to use a bit of white crayon, or liquid paper. Clean off the marks on the timing gear cover that show degrees. Jumper the diag block. Start then engine. The timing light will strobe, making the notch on the front main damper appear to be stationary. Adjust the CPS until that stationary mark is sitting at the correct place on the timing gear cover.

    That's all there is to it.

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    Default Re: Exhaust manifold was red hot!!??

    Lean is hotter due to more air less fuel., A higher (leaner) air fuel ratio will raise EGT's

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    Default Re: Exhaust manifold was red hot!!??

    Quote Originally Posted by Devin LeBlanc View Post
    Lean is hotter due to more air less fuel., A higher (leaner) air fuel ratio will raise EGT's
    so if its running leaner as most of you guys have said... i have to adjust the timing.. with the distributer and the timing gun... I always hated the timing situation but it sounds like its very important..lol.. let's see how it goes tomorrow.. thanks guys!

    JDM GE and R-154 SWAP...its done...

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