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Old 08-09-2011, 07:15 AM
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400 sbc problems

i was on my way to work when it felt like it started to bog out then it died so i would tryand start it up and could get it started but the smoke was to much so i gave it a break and it also had steam from the p**** side head area but the drive side exhaust had mor smoke and even an oil residue in the pipe it runs bad and idk what it would be we have a few ideas jumping around but dont know for sure we will be taking the valve covers off and see if we see ne thing and maybe evemn the heads and help is wanted thank you

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Old 08-09-2011, 10:18 AM
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i took the covers off and saw nothing im thinking that the timing chain could have jumped
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Old 08-09-2011, 10:56 AM
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Did you add steam holes on the heads? Sound to me blown head gasket.
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Old 08-09-2011, 11:17 AM
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Is this a freash rebulid?
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Old 08-09-2011, 12:34 PM
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Did you re-torque the heads after running the the motor for a while?
BTW: Adding a thin layer of Teflon pipe tape around the thread of the head bolt will reduce the chance of water seepage into the chamber.

Last edited by lg1969; 08-09-2011 at 12:45 PM.
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Old 08-09-2011, 07:53 PM
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this is not a rebuild its stock so it already has the steam holes and would a blown head gasket cause oil in my tailpipe my old man thought the timing chain could have jumped
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Old 08-09-2011, 07:55 PM
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and itsz been running for a straight year as a daily driver some down time tho just not much
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Old 08-09-2011, 08:40 PM
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If you have steam on one pipe and a little oil from the other you either have a head gasket that is ruptured or intake manifold gasket is leaking. If it jump a tooth on the timing chain. Better make sure you check for bent valve or cracked a piston. Good luck
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Old 08-09-2011, 09:32 PM
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ha thank you i hope it goes well i guess what your saying in cheeck head gaskets and replace and see what i see when i take em off
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Old 08-10-2011, 08:31 AM
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Get a compression gauge and check for PSI in the cylinders before you take it apart.
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Old 08-10-2011, 08:34 AM
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my dad said he cranked it and there swas a low end knock sound bad bearing be a possibilitie cause when it died it had a klunk
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Old 08-10-2011, 08:45 AM
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It look like you may have to take it apart anyways.
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Old 08-10-2011, 09:40 AM
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i think we think there might be a cam prob it makes some sense as to it would ru n like poo the spit ol if its messed with the valves and the klunk it might be wrong but im thinking if i pull the motor check for a bearin g prob or something else and find noting i guess pull the cam is this dumb or ????
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