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| Gasket Leak https://slantsix.org/forum/viewtopic.php?t=67190 |
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| Author: | valleyguy [ Mon Apr 10, 2023 12:29 pm ] |
| Post subject: | Gasket Leak |
Well I reinstalled my intake/exhaust manifold on my 3 Valiant, using the Fel-pro gasket.. added antifreeze add the darn thing started leading immediately from two spots. Should I had used sealant on the gasket? Also the shop manual is confusing with regard to Torque vales. "Exhaust manifold Nut - 10 ft lbs, Exhaust pipe Flange nut, 30 ft lbs. Exhaust pipe support clamp bolt 20 ft lbs. Maybe I over tightened? I just need to know the torque valves for the upper set of nuts (the studs already on the head), and the lower 6 bolts that go under the exhaust runners. Any help appreciated |
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| Author: | and739 [ Mon Apr 10, 2023 1:08 pm ] |
| Post subject: | Re: Gasket Leak |
Here's a link to a tech article that has some good manifold installation tips: https://www.slantsix.org/articles/manif ... unting.htm Also, did you install new manifold studs in the head during the install? These studs go into the head's water jacket and need thread sealant. |
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| Author: | valleyguy [ Tue Apr 11, 2023 4:56 am ] |
| Post subject: | Re: Gasket Leak |
Thank you very much; Good info that I wasn't aware of.... Should I use regular thread sealer found in Advance auto etc., or is another type sealant preferable for the studs? |
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| Author: | Greg Ondayko [ Tue Apr 11, 2023 5:48 am ] |
| Post subject: | Re: Gasket Leak |
any regular thread sealer. I have also used hardware store brush on pipe dope. I am sure they are somehow chemically different but I have yet to have any issues. Greg |
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| Author: | Charrlie_S [ Tue Apr 11, 2023 6:21 am ] |
| Post subject: | Re: Gasket Leak |
Quote:
Maybe I over tightened? I just need to know the torque valves for the upper set of nuts (the studs already on the head), and the lower 6 bolts that go under the exhaust runners.
I don't recommend using bolts. Use studs, butterfly washers, and nuts on the lower mounting also. Those studs should also have sealer on them.
Any help appreciated |
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| Author: | valleyguy [ Tue Apr 11, 2023 12:35 pm ] |
| Post subject: | Re: Gasket Leak |
Anyone know a source for new studs for this manifold? Can't seem to find any.... |
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| Author: | and739 [ Tue Apr 11, 2023 12:50 pm ] |
| Post subject: | Re: Gasket Leak |
I've found these from Dorman 675-093 at O'reilly's and Summit. https://www.summitracing.com/parts/rnb-675-093 My local Ace Hardware has some of the right size in their "parts drawer" hardware section. |
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| Author: | SlantSixDan [ Tue Apr 11, 2023 1:22 pm ] |
| Post subject: | Re: Gasket Leak |
Quote: Well I reinstalled my intake/exhaust manifold on my 3 Valiant, using the Fel-pro gasket.. added antifreeze add the darn thing started leading immediately from two spots …is why it is very much worth your while to get the good gaskets for the manifolds-to-head and intake-to-exhaust junctions. Quote: the shop manual is confusing with regard to Torque vales. "Exhaust manifold Nut - 10 ft lbs, Exhaust pipe Flange nut, 30 ft lbs. Exhaust pipe support clamp bolt 20 ft lbs. What's confusing about this? Quote: I just need to know the torque valves for the upper set of nuts (the studs already on the head), and the lower 6 bolts that go under the exhaust runners. Errr…no, the manifolds are held to the head with studs only. There are no bolts involved in that junction. If there are bolts trying to hold the manifolds to your head…somebody's been in there hamfistedly doing it wrong. It's studs (installed in the head with the appropriate thread sealant, which is Loctite 542 or 592) and correct nuts and correct washers you need. One article has already been linked. Another relevant thread is here.
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| Author: | Rick Covalt [ Tue Apr 11, 2023 6:13 pm ] |
| Post subject: | Re: Gasket Leak |
Quote: Anyone know a source for new studs for this manifold?
There is a good place on line to get them for a lot less than Summit. I can't remember the sight off the top of my head. Something "seal" in the name. I will look for it and post back.Found it. Silver Seal Products Co. Item # 6403 |
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| Author: | valleyguy [ Wed Apr 12, 2023 4:15 am ] |
| Post subject: | Re: Gasket Leak |
Thank you! |
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