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post #1 of 33 (permalink) Old 07-15-2011, 03:20 PM Thread Starter
 
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leaky headers -

I am having the header gaskets replaced in my 455 and they tell me that whoever installed them did not drill and tap an new hole on each end to get them to seal properly.

Has anybody else ever successfully drilled these holes while the heads were still in the car or is it absolutely necessary to pull the heads and have them drilled on a press. I think it would be fine if the hole was not absolutly straight.

Thanks,

Last edited by gotyorgoat; 07-15-2011 at 03:58 PM.
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post #2 of 33 (permalink) Old 07-15-2011, 04:09 PM
 
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depending on the headers it can be a daunting job just getting them to bolt up without leaks in the first place, first time i dropped my motor in seriously took me 7 hrs to get the headers bolted up and in place. i doubt you could do anything but screw up your heads trying to do them while in the car
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post #3 of 33 (permalink) Old 07-15-2011, 04:16 PM
 
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First thing that jumps to mind is ... this is not a weekend crafts project, this is not a glue and nails birdhouse, this is not a snap and go plastic model. It's a high performance Pontiac. And if it were me, I'd do it right the first time for the last time.

But hey it's your ride.
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post #4 of 33 (permalink) Old 07-15-2011, 04:28 PM Thread Starter
 
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I guess the right thing is to pull the heads. I'll spend the extra money now so I dont have to do this a second time. Thanks for the input.
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post #5 of 33 (permalink) Old 07-15-2011, 04:38 PM
 
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I hate to say it but.....that is really the only way to go. UNLESS you get a pair of the correct ram air factory cast headers.....See: http://www.ramairrestoration.com




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post #6 of 33 (permalink) Old 07-16-2011, 05:42 AM
 
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VEEERRRROOOOMMMM!!!!!!! uncle E

Head-off-manifold bolted down, drill. Or say f'it and go for the Ram Air.

I am sure every one pushing the ram air manifolds sounds like a cheesy spokes person for their company, but every one knows or will soon know. That out side of full up racing. Headers can have some draw backs. Some people have no trouble with them and others can't fix them fast enough. The RA manifolds are less likely to leak and don't need mods for the most part.

Now if I can just find that pile of money I keep miss placing. Better go ask the wife she might know

66 GTO 4bbl power windows A/C auto
67 GTO H.O. Convert 4spd
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post #7 of 33 (permalink) Old 07-16-2011, 06:47 AM
 
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I speak from experience....given the choice (flow) I would put cast ram air headers on my car in a heartbeat!....aside from weight, if you don't need tube headers, I can't see areason for 'em. IMHO> E



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post #8 of 33 (permalink) Old 07-16-2011, 07:03 AM
 
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got a good deal on some brand new three pipe Hedmans (100.00) with jet coating, looks like they will eliminate a lot of the issues i have with my 4 pipes as the third bolt back is more accessible and i can actually get an open end on them and turn it more than 1/100th of a rotation at one time. Am dreaming of the RA manifolds, just not in the cards right now.
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post #9 of 33 (permalink) Old 07-16-2011, 07:07 AM
 
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Like that, If the wife knows where the money pile is/was, beleive me she already spent it....on important stuff, like drapes, nail polish, smelly candles, new sheets, etc.....



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post #10 of 33 (permalink) Old 07-16-2011, 07:10 AM
 
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Quote:
Originally Posted by Instg8ter View Post
got a good deal on some brand new three pipe Hedmans (100.00) with jet coating, looks like they will eliminate a lot of the issues i have with my 4 pipes as the third bolt back is more accessible and i can actually get an open end on them and turn it more than 1/100th of a rotation at one time. Am dreaming of the RA manifolds, just not in the cards right now.
But his problem is different...much work, parts, machine shop, coolant, gaskets, labor....will help offset the price of those beautiful new mqanifolds........you just want them, he needs them!



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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

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