Paste or grease?
QI want to fit a new exhaust to my Super Snipe. I recall you recommending copper grease to slip sections together – but exhaust fitters use exhaust paste. What are the advantages of each?
James Stuckey, Bristol
AThe paste expands as it gets hot and dries out, thus guaranteeing no leaks even if the pipes are a poor fit. However, it makes the sections harder to disassemble at a later date. Copper grease makes disassembly easy but won’t seal leaks. Trial-fit the sections on the floor. If they’re a snug fit, use grease.