Exhaust manifold question

[mtgibby]

Here's a real rookie question for you!

My left and right exhaust manifolds were refinished when I purchased my stalled restoration project.

The studs for the exhaust pipe had been removed. I will get a replacement set from SI.

How can I tell left from right for reinstallation? Is the only difference the longer studs on the passenger side for the heat riser valve?

Thanks,

Mike

[StudeNorm]

Mike,

I had to replaced both my manifolds (one had a broken stud and the other was broken in half at No. 7 exhaust port) and found that the original exhaust manifolds were the same as the stock left side from the sedans, of which I had a few lying on my parts shelf. At least they both fit without any problems. My car has the heat riser delete so the replacement studs used were the short shank version and were also not a problem.

If you use the heat riser valve it will require longer studs on one side and that is usually the right, or passengers side.

If you are like most owners and only drive your Avanti during the warmer months the heat riser system is not really required. Deleting the heat riser may cause the choke to take a few minutes longer to unload but if it is properly set and working OK it will be fine. A heat riser delete won't affect anything more and may even keep the carb a bit cooler during normal operations.

I haven't yet consulted the Authenticity Manual about this issue (heat risers and stock manifolds) but I expect there may be a reference in it so I recommend that if you don't already have that manual you should make the effort... and also make sure you have the Avanti shop and parts manuals, available from some of our vendors for very reasonable prices.

Edited August 11, 2016 by StudeNorm

[mtgibby]

Thanks StudeNorm. I think I have all the hardware to hang the SS Silvertone exhaust this weekend!