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Replacing Manifold instructions

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nick55

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"I own a 4.3LX/V6 Alpha One me

"I own a 4.3LX/V6 Alpha One merc,
This winter, the manifolds cracked,
how do I replace them? just screm the new one's reasonally thight? with locktide? or do you have to use a torque key?

thnx!"
 
"Ayuh,....

Before you get T

"Ayuh,....

Before you get Too far,.. You otta be Checking for Cracks in the Block.....

The Mainfolds are just removed by pulling the Bolts,....
Clean up the Gasket Surfaces,...
Install the New 1s,...
Never-sieze the bolts,+ torque to 35/ 40ft.lbs....."
 
"Same here, how was it winteri

"Same here, how was it winterized? Like Bondo says,check the block first before just ordering manifolds"
 
"I did test the boat for 1 hou

"I did test the boat for 1 hour, about 3500 rpm
Looked with mirror, only the manifolds did crack
do I put some kind of sealant between the gasket and the manifold, or is the gasket sufficient as sealant?"
 
"It was winterized by releasin

"It was winterized by releasing all hoses and extracting the water (by the previous owner)
I think he didnt do the job so good
"
 
You should check for water in

You should check for water in the oil before going too far.
No sealant required on the manifold gaskets. Just torque properly as Bondo says.

Rod
 
"Due to shipping costs, the de

"Due to shipping costs, the dealer in the states told me I should get alu manifolds, they are about $100 more expensive then original one's (shipping $470), but the shipping cost would be only $180.
Is there any reason I shouldn't get the alu one's?"
 
Have fun with replacing manifo

Have fun with replacing manifolds. Did it a few years back. Almost impossible to do by yourself and they get heavy after awhile trying to get the bolts in. If you can aluminum might last and won't be as heavy.
 
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