1987 350 merc.head redesign.

[john1947]

Hi,
What year did they redesign the heads to prevent leakage with cooling water?I guess the beefed up the flange
thanks,
john

 

[BonBini]

Are you refering to the center bolt valve covers on the gen ll sb chevy? ...Ron

 

[john1947]

Are you refering to the center bolt valve covers on the gen ll sb chevy? ...Ron

i heard the merc heads were prone to leak at the base. I was told the aftermarket brand have thicker bases so they hold up better.
john