Originally Posted by
velociabstract
It sounds like he has one of those spacers to isolate the heat from the manifolds that Code3 or TVT sold way back in the beginning. Get a longer bolt is the answer. Measure what you have and add a 1/4 inch and go shopping. Needswings sells longer than stock bolts for their manifolds. Rob may have exactly what you need if you can't find it at the local "Casa de Tornillos".
Les
Les, do you run cork gaskets? I thought that you ran OEM gaskets and the copper anti-seize product.
My opinion on why screws back out is because of excessive vibration and in this case because the cork based material gets crushed, this lessens the torque on the screws and they back out because they are looser and the vibration turns them, or more probably they are noticed to be looser
Back in the day cork valve cover required to be tightened regularly to keep them from leaking until finally they got hard, uneven in thickness and leaked all the time. At which point you tpreplaced the gasket and started all over again. It did not help that the covers were thin sheet metal and got distorted as well. That was the good old days.
