1989 4.3L v6 Mercruiser manifold riser bolts torque spec's?

TriCity Boater

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Nov 14, 2012
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Does anyone know the torque pressure for the 4 bolts for the manifold risers on a 1989 Mercruiser 4.3l v6? I've heard different pressures from 20-25lbs to 40-45lbs. Then I've also heard it doesn't matter just make sure they are all about the same by using a criss/cross pattern to tighten them.
 

NHGuy

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May 21, 2009
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Re: 1989 4.3L v6 Mercruiser manifold riser bolts torque spec's?

Make sure your gaskets are perfect, water into the exhaust can ruin stuff. 25 foot pounds is your torque.
 

TriCity Boater

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Joined
Nov 14, 2012
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Re: 1989 4.3L v6 Mercruiser manifold riser bolts torque spec's?

Make sure your gaskets are perfect, water into the exhaust can ruin stuff. 25 foot pounds is your torque.

Thanks I've been trying to get this info for about week now.
 
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