Best Head Gasket R302 (331) O-ringed deck

bigikediesel · Mar 20, 2015

I had M-6051-B51's (HG) installed, when i freshened the top end i found that the B51's were discontinued. I installed M-6051-CP331's.

At this time i also slapped a Parker Funnel Web on... I've been fighting a water in oil problem since. I've resealed the intake once already.

I'm going to buy another Super Victor... (silly mistake giving that last one away) and install new head gaskets.

As stated, the block is a 0-ringed r302; should I go with the M-5051-C51 or use the CP331? FRPP states that the B51 was replaced with the C51...

Plugs look good, not water in combustion chamber, held 20psi on the cooling system for a few days with little to no leaks.

Thanks!

Ed Curtis · Mar 20, 2015

Any graphite head gasket will work and probably last a long time versus a dead soft copper. I prefer the Mr Gasket ones but the standard FelPro 8548-PT2 or 9333-PT1 will work on a 4.030 bore... Just check the coolant hole line up...

:salute:

SRTthis798 · Mar 20, 2015

we'e ran copper on the old nitrous motor for years and never had an issue. but we ran orange RTV around the water ports then ran "alumaseal" in the water system.

willyt · Mar 21, 2015

+1 for the RTV around the coolant ports.

On MLS gasketed motors with no o-rings, I use Hylomar spray to help with sealing. On blocks with o-rings, I smear a very light amount of HondaBond around the water water ports on both sides of the gaskets.

bigikediesel · Mar 20, 2015

I believe i found some old B51's...

Ford Racing Mustang Head Gasket Set (79-95) GT 5.0L M-6051-C51

With the 9333, do you need to plug any coolant passages in the R302 block? Thanks for the input guys!

TomR · Mar 21, 2015

I fought water leaks in mine for a year. I tried everything.

I had the o-rings machined out and changed to a MLS and never had a single problem.

bigikediesel · Mar 23, 2015

Quick update!

drained the coolant, vacuumed the coolant from the intake/heads and pulled intake quick. Found that the front and rear coolant ports where leaking down the intake to the bottom of the intake. It was really bad on the rear passenger port. (see Pic) Gonna go with Right Stuff this time... and see if it'll seal.

I'm going to go back with the 1262s-3 intake manifold gasket and i've swapped back to a Super Victor 8.2.

Got a Parker Funnel Web with the clover cut out for sale! 95$ POLISHED! UMMM pretty! Buy it!

Sk33t3r · Mar 28, 2015

Im running felpro loc wire head gaskets Fel-Pro 1156-2, Fel-Pro Wire Ring Cylinder Head Gaskets | Fel-Pro

Best Head Gasket R302 (331) O-ringed deck

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