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Valley pan gasket question?

superbeedave

superbeedave

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Hey all, I have a 69 383 and last fall I pulled the aluminum intake off and proceeded to put a new valley pan gasket on and put my factory cast iron intake on to see how it runs. Now I am ready to install a new aluminum intake and the question is since I have already torqued down the bolts to 40 ft. pounds and the aluminum intake only needs 25 ft. pounds will it still seal okay even after the gasket has been flattened to 40 ft. pounds, or install a new gasket?
Thank you, Dave
 
New gasket everytime you change the intake.
 
I’ve reused the valley pans before, no issue. I used a sealer.
 
superbeedave said:
Hey all, I have a 69 383 and last fall I pulled the aluminum intake off and proceeded to put a new valley pan gasket on and put my factory cast iron intake on to see how it runs. Now I am ready to install a new aluminum intake and the question is since I have already torqued down the bolts to 40 ft. pounds and the aluminum intake only needs 25 ft. pounds will it still seal okay even after the gasket has been flattened to 40 ft. pounds, or install a new gasket?
Thank you, Dave
Click to expand...
No They are a single use gasket. Buy a new one.
 
When I got my car it had a vacuum leak that took forever to track down. The intake leaked on the bottom edge. There was the pan and two gaskets. Way too tall. Put the pan in and set the intake in place. Look down the bolt holes and see if the intake holes line up in center of the head holes. If not add one gasket set at a time till they do. I ended up with the pan only with sealer. No more vacuum leak
 
I switch back and forth between a tunnel ram and 4 barrel intake. I have reused the valley pan several times over using JB Weld gray gasket sealer. **** works great and I've never had a vacuum leak.
 
Having 're-used them, sometimes it works, sometimes not. That being said, I'm not going to do it over just to cheap out.
 
Thank you everyone for the comments/advice. I thought of purchasing the fel pro 1214 with crossovers blocked and drilling about a 1/2 hole to let some heat through and using the sealer. I'm just not sure which sealer to use and everybody and their brother uses different sealers. Thanks again guy's, Be careful out there it's a scary world right now!! Dave
 
Gaskasinch is what I have used for intakes.
edl-9300.jpg
 
Yep, the pan is embossed, once flattened it’s lost cushion to help seal. I’d bet the Hondabond is the same as the Yamabond I’ve used, grey, messy but the best sealant I’ve used. Some people use the thin paper gaskets on either side of the pan, but that looks like a nightmare of alignment and sealant mess. Mopar makes a Max wedge intake with an integral valley tray like small blocks, but no standard port models, too bad....
 
When you have everything cleaned up, I like to sit the manifold on the heads without any gasket to see how well it mates together. That will tell you if you need the paper gaskets or not. Try sliding a feeler guage under the lower side of the manifold.

I like useing High Tack or Indian Head Shellac on the pan around the ports, Permatex Gasket Maker in the corners.
 
Splangj said:
I’d bet the Hondabond is the same as the Yamabond I’ve used, grey, messy but the best sealant I’ve used. .
Click to expand...

Same stuff... Also sold labelled as Three Bond which is the company that actually makes it.... But Hondabond is the easiest to find & Amazon makes it really easy so thats the one I linked...
 
Splangj said:
......Some people use the thin paper gaskets on either side of the pan, but that looks like a nightmare of alignment and sealant mess.....
Click to expand...

If you have a plan, it's probably the easiest thing going.
 
superbeedave said:
Hey all, I have a 69 383 and last fall I pulled the aluminum intake off and proceeded to put a new valley pan gasket on and put my factory cast iron intake on to see how it runs. Now I am ready to install a new aluminum intake and the question is since I have already torqued down the bolts to 40 ft. pounds and the aluminum intake only needs 25 ft. pounds will it still seal okay even after the gasket has been flattened to 40 ft. pounds, or install a new gasket?
Thank you, Dave
Click to expand...
If you want to go the cheap route and blow up your motor reuse the old one.
 
Dave, be forewarned. I was talked into a valley pan with the blocked off heat cross over. It was a bad choice.
No heat means that your choke well does not heat up, therefore you choke takes forever to release. I would not recommend it at all. My A12 is very happy again.
 
Vinny said:
Dave, be forewarned. I was talked into a valley pan with the blocked off heat cross over. It was a bad choice.
No heat means that your choke well does not heat up, therefore you choke takes forever to release. I would not recommend it at all. My A12 is very happy again.
Click to expand...
You can adjust the choke, you know.
 
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