Originally Posted by GParkins
Along those same lines, TBM, I replaced the manifold gaskets on my TR-4A-engined +4 today. I used a graphite Remflex gasket as the replacement. Naturally, when tightening the last stud bolt, I sheared it off, right at the head. I was able to drill it and extract the remnants with an EZ-out. Fortunately, those who came before me had the good manners to use an anti-seize compound.

I expected the engine compartment clamor to subside a bit, but I was pleasantly surprised by several ancillary improvements. The engine ran cooler, the cockpit temperature was cooler, and the crackling and popping on the overrun is now gone. Someone also pointed out that the CO levels in the cockpit have probably dropped as well.

What's really put a grin on my face is that I can once again hear the SU symphony when I roll on the throttle and really get after it. It's not the full orchestra that you get with Webers, but it's not an anaemic little wheeze, either.

All of the misery seems to have been coming from the #4 cylinder:


Top work - luckier than me with the broken stud! I've stuffed a sh1tload of anti sieze on the new studs!

The popping on overun, and the cockpit smell were what alerted me to check the manifold. Can't wait to get her fixed......

1972 4/4 4 seater, 1981 MGB GT
1984 Harley Davidson Electra Glide, 1990 Kawasaki ZX10