Head repair
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Head repair

  1. #1
    BTC cardcarrying member SuperSoaker's Avatar
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    Default Head repair

    I just pulled my heads to fix some leaking valves and found this
    I know I need to weld them, but is there any Do's or Don'ts I should look out for




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    Senior Member GT Jets's Avatar
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    Belzona 1121 (Super XL Metal), like epoxy but better, patch em and have them surfaced, be like a new head...Been using this stuff for Chillers (HVAC) for several years, expensive but amazing...

    http://www.belzona.com/prod1k.aspx

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    steelcomp was here
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    You really don't want to weld them if you can avoid it...you'll probably pull that ex seat out of shape and need to grind it. There are plenty of high grade epoxies on the market that'll fix that, JB weld would even do it.
    JMO

    WHOA! Didn't sse that third pic...wow. You're asking for a lot of distortion if you weld all that. I'd still opt for a good epoxy. You'll need to get all that oxidation out of there, though...may not have a lot to work with when you're done.
    Last edited by scott foxwell; 01-25-2009 at 06:39 PM.
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    We weld them all of the time, no issues. Got 3 sets in here now. TIMINATOR
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    Senior Member H20MOFO's Avatar
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    Wow, Just out of curiosity how old are those cyl. heads??
    Another Hot Boat refugee

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    BTC cardcarrying member SuperSoaker's Avatar
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    they are 3 seasons old AFR's

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    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by SuperSoaker View Post
    they are 3 seasons old AFR's
    But keep in mind, you boat in brackish/semi-salty water.
    Does AFR offer a hard coating on the inside?
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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    BTC cardcarrying member SuperSoaker's Avatar
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    Quote Originally Posted by HammerDown View Post
    But keep in mind, you boat in brackish/semi-salty water.
    Does AFR offer a hard coating on the inside?

    These are the marine heads, they coat the out side and inside then put
    Inconel valves in them.
    Last edited by SuperSoaker; 01-28-2009 at 03:04 PM. Reason: made a mistake they coat both in and out

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    gn7
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    are these on a gen 5 or 6. Just looks like they are trying to open up to the big ass holes in the deck of the block. Once you epoxy them up, it will probably stop, THERE. But you have to wonder how long they can last everywhere else. I's be really up on the flushing, and maybe run some polypropylene glycol (RV anti freeze) thru it after every use. DO NOT USE ethylene glycol



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    Last edited by gn7; 01-26-2009 at 07:50 AM.

  12. #10
    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by SuperSoaker View Post
    These are the marine heads, they just coat the out side and put
    Inconel valves in them
    Hmmm, I thought Jetmeck stated his marine Edelbrock's were hard coated on the inside too...could be I'm just hearing things.

    Damn > if your expensive AFR heads are eating themselves away on the inside that quick...that kinda sucks!
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  13. #11
    BTC cardcarrying member SuperSoaker's Avatar
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    Quote Originally Posted by gn7 View Post
    are these on a gen 5 or 6. Just looks like they are trying to open up to the big ass holes in the deck of the block. Once you epoxy them up, it will probably stop, THERE. But you have to wonder how long they can last everywhere else. I's be really up on the flushing, and maybe run some polypropylene glycol (RV anti freeze) thru it after every use. DO NOT USE ethylene glycol
    It's a gen5. the head gasket is like the head with just a 1/2in hole in it but the sealing ring is for the big hole so the salt gets between the gasket and the head. Looking in the water passages they look good it's just at the gasket surface.


    Quote Originally Posted by HammerDown View Post
    Hmmm, I thought Jetmeck stated his marine Edelbrock's were hard coated on the inside too...could be I'm just hearing things.

    Damn > if your expensive AFR heads are eating themselves away on the inside that quick...that kinda sucks!
    I will be pulling the Edelbrock's off the other motor this weekend and will look at them. I do know they are coated outside and come with Inconel valves but will check the inside.

  14. #12
    gn7
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    The Edelbrocks are treated inside and out and are done before any machining is done.
    Try some permatex hylomar around the water holes of the gasket inside of the printo sealed area so that the gaskiet is sealed to the head all around the water jacket hole. AFTER you have fixed them with epoxy



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    The Edelbrock Marine heads are hard coated on the inside. Unfortunately it is done before machining and anywhere they machine is just raw aluminum.

    If you are boating in Salt water, you need to go out of your way to get the salt out of the engine. Flush the engine with fresh water, next there are products called Salt Away and similar that help to remove the salt.

    If the salt water is left in there, an electrolysis condition will occur. The active aluminum head will disolve, protecting the more noble cast iron block.

    Doug

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    BTC cardcarrying member SuperSoaker's Avatar
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    Quote Originally Posted by GT Jets View Post
    Belzona 1121 (Super XL Metal), like epoxy but better, patch em and have them surfaced, be like a new head...Been using this stuff for Chillers (HVAC) for several years, expensive but amazing...

    http://www.belzona.com/prod1k.aspx

    GT

    GT have you used this on Alum.?

    I have tryed JB Weld and Marine Tex on Alum water pump block offs. I ground off to fresh alum, pulled off at end of season and it was gone

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