MERCEDES MAINIFOLD GLOW WHILE RUNNING OVER 100 KM/H FOR 1-2 MINUTES

1979 Mercedes Benz 230te

Tiny

benzo_230

March, 1, 2011 AT 12:57 PM

Dears, I have a mercedes W123 with m115 engine, and the care is totaly original parts no any modifications took place.
Header glows red after 1-2 minutes running over 100 KM/H, I have checked:
(timing, exhaust system)
fully repaired the engine.
replacd:
1- all internal parts of the engine (Pistons, valves. Etc)
2- carborator needles, and all relevant parts of the carb
3- changed the header with an original one

i'm sure of the gasoline mixture, and air flow adjusted
engine running smothly in idle state, without any vibration.

and could not find a hell way to recover this **** symptom.
please advise

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