Manifold and riser change gasket Q’s

Joined
Jul 21, 2020
Messages
5
Hey folks. Long time google lurker. Thought I’d join. We bought a 1990 bayliner 20 footer and it has a 4.3 mercruiser serial#0D382045 and it has a cracked manifold. Two manifolds and risers on the way and wondering if the gaskets are dry fit on the block and between risers or do I need some anti seize/lube there?

also, any tips on cleaning the surface and avoiding contamination of the block ports ?
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,967
get good gaskets (not sierra brand)

install dry

bolt manifold to head

bolt elbow to manifold

if your head gasket surface is rusty, hit it with a wire wheel and a sanding block

any sanding debris you get in the block ports will come out when you fire up the motor.
 
Top