074 head repair - Page 2

**SuperNovaSS** · #11 03-16-2009, 01:29 AM

Could someone have opened up the water jacket to heat riser area on purpose for some reason?

**Alss** · #12 03-16-2009, 01:44 AM

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Could someone have opened up the water jacket to heat riser area on purpose for some reason?

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that thought crossed my mind..but why?? also how would that efect the function of the head??..water crosses over the front and rear of the manifold why not once in the middle?..or why not block the crossover and let the crossover remain dry??..someone has to know..not my strong area.

**Bill Rose** · #13 03-16-2009, 01:45 AM

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I'm starting to think you should have
left the 307 in it

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NO WAY!!

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Just goofin around. You guys will get it straightened out, and it will be flying around the streets here soon.

JoeG · #14 03-16-2009, 02:24 AM

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Albert,

Depending (which is a big if) on what type of damage you have, as a "home" cure option you can use a high quality epoxy like Marinetex.

I used to work at a cylinder head shop where the guys porting the heads would accidentally grind into a water jacket or breakthrough a port.

We saved a lot of heads using epoxy.It takes some practice to fill the hole and grind/smooth it down. And it can be done with good results.

As a plan B, we had a guy who could really weld aluminum like a magician.

Can you have your machinist take a look at the heads and get an idea of exactly what you are dealing with?

Elon

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Ditto,he makes good sense---this is not the time to rush things.......Forget the grout..

**wheelhop** · #15 03-16-2009, 04:44 AM

How about that stuff that Billy ?????? something sell on the infomercials??? Mighty Putty

**Alss** · #16 03-16-2009, 04:45 AM

I have the name of a nearby reputable head shop (LOL) ..will call tomorrow and see what they have to say..been a tough couple of days..hope this all works out soon...thanks everyone

Albert

**Alss** · #17 03-16-2009, 04:55 PM

Got this from a guy on Team Chevelle..its the problem I have....

Think it could be fixed??

This was a common procedure back in the day of those heads, to put in longer rocker studs on the bottoms, and unless you were real careful you ended up drilling clean through the exhaust crossover? This is only on one stud on each head! The idea was to "double-helicoil" the original threads by drilling down deeper! Both these particular studs needed to be 'trimmed" in their respective locations before installation!

ARP still sells the stud package for these heads!

You don't say how much water was in where, but this was a very common error when working on the "074's" AND the later "077" casting as well!

DarrenX33 · #18 03-16-2009, 05:20 PM

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How about that stuff that Billy ?????? something sell on the infomercials??? Mighty Putty

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Funny Hanke.

**njsteve** · #19 03-17-2009, 01:25 AM

I think you should fill the hole with Shamwow! It's miraculous at water absorption.

**427king** · #20 03-17-2009, 03:15 AM

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I have the name of a nearby reputable head shop (LOL

[/ QUOTE ] What shop built the motor? ...Pat Musi is right around the corner,and hes one of the best. Why put repaired heads on a 25K motor anyway if youve already had 3 problems?

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