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jcb47769's avatar
jcb47769
Explorer
Sep 10, 2017

Class C 1994 with e350 chassis exhaust manifold glowing red

Has anyone seen anything like this?


It's not a clogged catalytic converter, and I've replaced the PCV valve recently.

Exhaust manifold glows under heavy load (hills and over 55)

I found a small exhaust leak in the manifold gasket, thinking about sealing it with exhaust repair epoxy instead of risking the rusty bolts holding on the manifold.

17 Replies

  • Llibnmap wrote:
    IMO if mainfolds are glowing red it's running way too rich! Either that or the exhaust is clogged. Just my thinking

    Bill


    100% correct.
  • No CEL but EGR is disconnected at the moment. It was glowing before I disconnected it though. Do 1994 e350s get check engine light though?
  • Llibnmap wrote:
    IMO if mainfolds are glowing red it's running way too rich! Either that or the exhaust is clogged. Just my thinking

    Bill


    On a gas eng it would indicate a lean condition.

    If it has been a long time since the 02 sensor has been replaced, I would do so.
    They get lazy and cause poor performance way before they're so bad it triggers a CEL.
  • That have a heat riser by chance? If it does it's sticking.
  • IMO if mainfolds are glowing red it's running way too rich! Either that or the exhaust is clogged. Just my thinking

    Bill
  • Yeah I"ve seen that in my 1989 E350 that also got the tail pipe beet red and blistered the paint on the side of my rv. Problem? The O2 sensors were bad which caused the gas to flow heavily into the catalytic converter and finally caused the internal portions to fall apart and plug up. Result was lack of power and 4mpg.
  • Normal. Be sure its the gasket and not a cracked exhaust manifold. Cracked manifold very common for a 460. Usually passenger side rear.