So my mate who works for Ferrari said there's this stuff called chemical metal...... :D
Anyway, thought this should be useful. A definitive checklist on how to avoid melting your engine for anyone who has built, restored, recently bought or just had a G40 laid up for a while.
First one which has prompted me to write this, Mark's G40 started misfiring recently, easy fix – unplug the lambda and sorted. The lambda was new a year previously so something has killed it, running too rich or lean. The car had an issue where the fuel pumps wouldn't prime, turned out the connector for the relay had corroded just enough to stop the contact. Had that not been driven like a vagina, rather than the lambda probably would have taken the engine out. Worth a look for any 40's that have been laid up.
Another one sometimes forgotten is the wiring in the top of the fuel rail, again corrodes, goes brittle etc.
Fitting a smaller pulley/upping the boost without the fuel to suit a quick way to achieving an extra oil pump. IE a chip for a 68mm pulley and fitting 65mm toothed belts will do it on about the 3rd 145mph run.
Injectors, fuel pumps, shit in the tank and blocked filters will all lead to the same. Easily done with how the tanks corrode. Can you still get the accumulators (yellowish box by fuel pump) from vw? Haven't asked in a while...
Timing's always worth a check, both of.
Realistically a G40 shouldn't melt if its right and it's always a shame to see them go down.
Sure everyone else can add their bit, might save a few engines.
Thanks Phil, legend and saviour :-)
Really did not seem like a Lambda like how it went last time, but glad its identified now. Just to buy the right one
Hoping its just leaving the car laid up for a few months that's caused it, or that it was a NGK one