915 head needs repair

[Garys1969RR]

Any one know how to repair a hole in an intake port, going into the water passage?

 

[Supershafts]

you need an epoxy , marine tex worked for me

 

[Garys1969RR]

Ok thanks! Was nt sure if J B Weld would work, but that Marine Tex must be durable with water on one side, and Fuel/Air on the other? Do you get that at a Boat repair supply? Have nt heard of it. The 1/4 inch hole is in the intake bowl near the valve guide.

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Ok thanks! Was nt sure if J B Weld would work, but that Marine Tex must be durable with water on one side, and Fuel/Air on the other? Do you get that at a Boat repair supply? Have nt heard of it. The 1/4 inch hole is in the intake bowl near the valve guide.

 

[Cranky]

How large is the hole?

 

[chignikred]

if this hole is from erosion, or cavitation, you may have other thin spots. a replacemnt head isnt that expensive to consider.
Marine- Tex is a good product, or Belzona the top end product. This speaking from 20 years in Alaska fishing industry.

 

[Garys1969RR]

Hole is about 1/4 inch diam

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I ported the bowl too far, hit water

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915 head, hole is near valve guide

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ported the bowl too far, hit water

 

[goose69]

Hole is about 1/4 inch diam

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I ported the bowl too far, hit water

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915 head, hole is near valve guide

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ported the bowl too far, hit water

Thats what my buddy did while porting his 360 heads for his racecar. He used JB weld & I toldhim it wouldn't work. Well that was my mistake, he ran it all season in a challenger turning low 11's, man he didn't let me live that down!

 

[Garys1969RR]

Ok going to have 1 head hot welded, the other small hole, JB WELD. See what works.

 

[Meep-Meep]

What concerns me about welding is if the surrounding metal around the hole is really thin it will blow away as soon as the welding begins, leaving even a bigger hole. If you use an epoxy, the area to be repaired must be super clean, and I don't mean wash with solvent and blow dry. I think it needs to be chemically cleaned.

 

[Garys1969RR]

problem with posting reply

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Meep Meep, would Brake clean be adequate?

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And then light sanding?

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Or Acetone as a cleaner?

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What type cleaner?

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Some type of acid?

 

[Garys1969RR]

Ok ordered some epoxy putty from Summitt

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Specially made to repair intake ports

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Called Manley magic seal epoxy

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Hopefully the solution to this problem!

 

[RustyRatRod]

I have not seen many people in my lifetime that can successfully weld cast iron. Maybe only two. ONe is still alive and even he says cast iron welds are a toss up as to whether they turn out. Good luck.

 

[Meep-Meep]

Ok ordered some epoxy putty from Summitt

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Specially made to repair intake ports

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Called Manley magic seal epoxy

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Hopefully the solution to this problem!

Hmmm, sounds spot on for the application! Good luck!

 

[Garys1969RR]

Backed off on the welding idea. Prob ruin the head beyond repair. Will stick with epoxy.