Mercruiser Setting Timing on 3.0L

Scott06

Admiral
Joined
Apr 20, 2014
Messages
7,195
Perfect thanks!

This is what the block looks like in between the two cylinders. Not sure how good you can see it but I'm assuming this is what fire slotted means?
could be cant tell from the pics if the block surface is eroded or not. As mentioned below you need a long machinist flat bar to check the whole surface. You can put dykem or machinists dye on the block surface and sand with long sand block to see if the block is fire slotted- the dye will stay in low spots when it gets sanded off the high spots.

Use the sealant mention on the heads bolts and just reuse yours. I have never had an issue reusing head bolts unless these are torque to yield style
 

kd4pbs

Petty Officer 1st Class
Joined
Mar 5, 2012
Messages
303
I actually did that while I was cleaning the bolt threads, but with a tooth pick just so I dont damage anything around... But yeah there is absolutely nothing under the head bolts, it goes straight through to the block cooling system. Which makes me wonder if I should put something on the bolts so water doesnt go up them...
Yep - as I suspected like Scott wrote, but the manual seemed to indicate otherwise - you'll want to put sealant on the bolt threads. The only reason I have recently used the specialty sealant is because I have it; like Scott wrote, Permatex 2 will work fine... I've never had an issue using that either.
Glad you've gotten this far now and found the culprit. There's your problem! ;) That sucker is really blown.
The damage to the deck between #2 and #3 is quite suspect, but I have run worse. I hate to admit. If it were me, I'd probably coat the new head gasket with some spray on copper coat to give the fire ring a good chance of sealing adequately. Many people poo-poo the use of spray on copper coat on composite head gaskets, but I've never had an issue - and I've used it on countless heads, both air and water cooled motorcycle head gaskets and a few automotive aluminum head on iron block applications.
Congratulations!
Now, as they say, assemble in reverse order ;) (after checking things of course)
 
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