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#1
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Exhaust and other gasket(s) refresh
I have been creating a list of items that I will need to complete the project of pulling the intake/exhaust manifolds to replace leaking gaskets.
Does anyone know what the size of the GM exhaust clamp is at the bottom of the "Y" pipe collector? Any specs for it and where I can find them would be a great help. I definitely have all of the gaskets I need and even have the extra thick gasket to try as well. Not sure if I will need that as I have the stock thin metal ones which should work but we'll see. Anyone know where I can find the spring and housing for the exhaust valve? I have been wanting to simply close that system off since it is prone to failure and it won't be used anymore. Anyone remember what the material was that people used to fill the inside of the exhaust manifold to close it off? Last thing I need is the thread pitch and size of the exhaust studs and nuts that I will need after they shear off and break. If you thin of anything else let me know. I might keep posting back with pictures to help others as I go along.
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69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213) 99 Valkyrie 1520cc Flat 6 108hp/110tq - For Sale http://sohcsix.yuku.com/forums/1/OHC-lounge Wanted: 1969 OHC "H" Camshaft |
#2
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After a bunch of research on it, I came to the conclusion it probably isn't worth filling the exhaust manifold to separate it. It takes a few quarts of fairly expensive ceramic filler, or you could use aluminum if you have a good source of aluminum stock and can pour it. For what it takes, look for some headers. The exhaust flapper can either be wire tied open or I removed it and tapped the rod holes and put bolts in them.
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__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6" The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) Last edited by TheSilverBuick; 02-23-2017 at 11:42 AM. |
#3
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Quote:
Yes aluminum would be great to use but I don't have the resources to do that. Where to get the material and how to keep it molten for the pour seems like it might be a bit expensive. My goal would be to keep the exhaust manifold as factory as possible. More importantly do you know where I might find the thread pitch and size of the exhaust studs at?
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69 OHC ZH Sprint Hurst 3 Speed 3:55 (1 of 213) 99 Valkyrie 1520cc Flat 6 108hp/110tq - For Sale http://sohcsix.yuku.com/forums/1/OHC-lounge Wanted: 1969 OHC "H" Camshaft |
#4
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I believe it is 3/8-16. I have hardware store bolts in mine.
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__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6" The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
#5
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The Parts Place offers a functional replacemnet for the Thremo Spring;
http://www.ebay.com/itm/331073664648...%3AMEBIDX%3AIT
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When I die, I want to go peacefully like my grandfather did, in his sleep. Not screaming like the passengers in his car. Last edited by Jeff Hamlin; 11-18-2018 at 08:22 AM. |
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