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Author Topic: 1989 Indmar 351 Manifold and Riser Replacement (Need Torque Specs.)  (Read 5384 times)

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Offline Baybilly

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  • Boat Make/Model/Year: American Skier / Advance / 1989
1989 Indmar 351 Manifold and Riser Replacement (Need Torque Specs.)
« on: August 18, 2016, 04:37:44 PM »
Hey all, I just ordered manifolds and risers for my new to me 89 Advance. Does anyone know what the torque specs. are for the bolts (manifold and riser)?

Thanks in advance.
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Offline backfoot100

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Re: 1989 Indmar 351 Manifold and Riser Replacement (Need Torque Specs.)
« Reply #1 on: August 23, 2016, 05:55:53 AM »
Manifold to head torque on my SBC was 25ft/lbs. I have no idea about the risers though. I would think 15-20ft/lbs would be more than sufficient based on bolt size. Having a clean, straight surface at the manifold/riser junction would be far more important to a good seal.
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Offline Baybilly

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Re: 1989 Indmar 351 Manifold and Riser Replacement (Need Torque Specs.)
« Reply #2 on: August 24, 2016, 03:03:40 PM »
Thanks for the recommendation!
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