so...have any of you ever seen something like this?
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so...have any of you ever seen something like this?

  1. #1
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    Default so...have any of you ever seen something like this?

    and is it repairable? Or do I have to get a set of new heads?Click image for larger version. 

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    Nice...

    not many can claim they've done that.


    S CP

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    gn7
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    Quote Originally Posted by Sleeper CP View Post
    Nice...

    not many can claim they've done that.


    S CP
    Are you kidding? I sweat that everytime I have blown a head gasket. I have a Ford 427 side oiler block that is junk because its torched between cylinders.
    I was sure this happened the last time we blew a gasket, because we didn't catch it for some time. Chasing other issues and it ran for sometime blown. We dodged the bullet.

    If the head is iron, its junk. If its alumn, its an easy fix.



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    Last edited by gn7; 09-14-2012 at 09:19 PM.

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    I was hoping you wouldn't say that...it's iron.

    So, are 088 heads a pretty good head? bolt on for a mark IV block?

  7. #5
    gn7
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    Quote Originally Posted by PowerAddict View Post
    I was hoping you wouldn't say that...it's iron.

    So, are 088 heads a pretty good head? bolt on for a mark IV block?
    Not to certain that they will work on a MKIV. Others here may have done it.



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    Quote Originally Posted by PowerAddict View Post
    I was hoping you wouldn't say that...it's iron.

    So, are 088 heads a pretty good head? bolt on for a mark IV block?
    The 088 head is designed for the Gen5/6 blocks,,,, look for a set of 188's (or 990's) if you want an iron rectangular port head for your application.

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    as far as a "factory" head goes, what is better?

    049, 781, vortec, 188/990?

    This will be on a prop boat.


    would Roller rockers be worth it at all on a flat tappet cam engine?

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    Quote Originally Posted by PowerAddict View Post
    as far as a "factory" head goes, what is better?

    049, 781, vortec, 188/990?

    This will be on a prop boat.


    would Roller rockers be worth it at all on a flat tappet cam engine?
    We need more information,,, the oval ports probably will work better on a lower RPM engine,, the rectangular ports if you start turning higher RPM, so is your "prop boat" a V drive,, what kind of RPM have you been running,, what gear and prop do you have,, how do you use the boat,, recreational family skiing and such, or want to "race" the boat? What other modifications have been done to the engine?

    Sounds kind of like you have a more or less stock street engine in a boat?

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    you're right, nothing fancy. Its just a mercruiser 7.4 in a 23' cuddy cabin boat.

    Ski and cruise. DO like to go balls out on lake michigan from time to time though.

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    058
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    Piece 'o cake.....I repaired a friend's BBC block that was torched as deep [if not deeper] as that with a wire feed mig welder. He thought his boating season was over because of it and nothing to lose with my attempt at repair. Only problem is that he had to find a machine shop that could grind the deck rather than cut it. Weld was so hard that a cutter wouldn't cut the weld, grinding the deck was the only option. Got it done and the engine held the gasket for about 2+ years until a piston came apart and ruined the block...not gasket/deck related.
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    gn7
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    Quote Originally Posted by PowerAddict View Post
    I was hoping you wouldn't say that...it's iron.

    So, are 088 heads a pretty good head? bolt on for a mark IV block?
    Quote Originally Posted by obnoxious001 View Post
    The 088 head is designed for the Gen5/6 blocks,,,, look for a set of 188's (or 990's) if you want an iron rectangular port head for your application.
    I may mistaken, but I think the head in the pic is a Gen head. But it had to be bolted to a MK or it would have been an overheating disaster with that head gasket. definitely a MK head gasket with opening at the front and rear.
    Quote Originally Posted by 058 View Post
    Piece 'o cake.....I repaired a friend's BBC block that was torched as deep [if not deeper] as that with a wire feed mig welder. He thought his boating season was over because of it and nothing to lose with my attempt at repair. Only problem is that he had to find a machine shop that could grind the deck rather than cut it. Weld was so hard that a cutter wouldn't cut the weld, grinding the deck was the only option. Got it done and the engine held the gasket for about 2+ years until a piston came apart and ruined the block...not gasket/deck related.
    I have heard of old timers nickel brazing them as well. Not sure a stock iron BBC head is worth the effort though. I would think it would easier and cheaper to just replace it.

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    Last edited by gn7; 09-14-2012 at 11:14 PM.

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    Quote Originally Posted by PowerAddict View Post
    you're right, nothing fancy. Its just a mercruiser 7.4 in a 23' cuddy cabin boat.

    Ski and cruise. DO like to go balls out on lake michigan from time to time though.
    OK,, so under 5000 RPM is a safe assumption? Did it have small oval port heads? It's really difficult to give valid advice without having all of the answers.

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    Quote Originally Posted by gn7 View Post
    I may mistaken, but I think the head in the pic is a Gen head.

    I am sure you are correct,, but he asked for MK IV heads. I keep asking to get more of a complete picture of what he has.

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    they're oval port, I'll go get the casting number, brb

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