4 replies to this topic

[Dusky]

Hi peeps!

 

Last week I let someone fettle with my ignition timing, to make this a short story : 

his timing light was badly connected in some way or another and he has put the timing at around -6 degrees of advance ( so basically retarded ignition)

Causing a red hot exhaust manifold...

 

WOudl this blow a headgasket? Only asking as I cant test the car atm ( bad fuelign on my weber,has a bad gasket wich needs replacing).

Car did not overheat ( was 88° coolant temperature)

 

Cheers

[mini13]

no likely,

 

its too much advance that tends to do the gasket, retarded timing will give the exhaust valves a hard time though.

[Ethel]

No,

 

all I can think is the hot exhaust was down to fuel still burning as it exited.

[Dusky]

Probably And all that fuel will be ignited because of the very bad timing probably

[Ethel]

It will burn slower as the cylinder pressures drop with the piston further down the bore. It could also be some charges aren't ignited at all - until mixed with hot gasses from another bore, in the exhaust.