‘76 90hp Head cover sealing…

[ryanp1227]

There is no gasket in the parts list for the head cover, only for the head to the block. I am replacing, and the one I had was sealed with some black RTV. Is that the correct process, or should I be looking for some unlisted gasket or?

Check out the chewing on this cylinder head, its why Im replacing it.

 

[ryanp1227]

…and this is the remaining sealant on the cover after a cleaning. I will be replacing this too, just want to know that is sealant is the way to go that this was the correct pattern

 

[racerone]

What caused the damage to the cylinder head ?----Did you have the motor apart or was the motor repaired years ago.

 

[ryanp1227]

I have no idea. It was “repaired” by previous owner. Low compression in cyl 3 less than 90psi and a little low in cyl 1. Caused all sorts of problems. Figured it was a head gasket or piston rings. Nope, its this. So i will be getting a new head and head cover, but just want to make sure about sealing the cover

 

[topgun3690]

No gasket for the cover....have used Permatex Optimum Grey with good results.....opinions vary on type of RTV to use.

 

[Nordin]

Damage to the power head is due to pre ignition or carb feeding that cylinder is clogged.
I think it is pre ignition.
Clean all carbs and check the timing.

 

[ryanp1227]

Carbs are freshly rebuilt, also new reed valves. That head, which im replacing, looks like someone shoved a bolt in the cylinder and let the piston go to town lol