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Head Gasket Questions 

 

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 Post subject: Head Gasket Questions
Posted: Mon Jul 17, 2006 8:41 am 
Stock as a Rock
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Location: Canberra
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Greetings All

I have an EA with 3.9 mpfi.
Going to take the head off for a good clean and strip, check the valves,
springs etc before putting a stage 1 cam in.

Two questions:

1. Is the AU gasket OK for the 3.9??

2. I've read elsewhere that you should run straight water for a day or two
to help the head gasket seal before putting in coolant.
Does this apply to the AU gasket as its metal ?? ( in a sandwich ?? ).

Thanks guys.
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Posted: Mon Jul 17, 2006 4:56 pm 
Fordmods Junkie
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1. AU Gasket will be fine

2. Never heard of that theory before. I think everyone has put coolant straight into the engines after a head gasket swap and has worked fine for many 1000's of km. Its how I have done mine, and its been all good.

Good luck with the work. :D
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Posted: Mon Jul 17, 2006 5:01 pm 
Oompa Loompa
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Its a lot of work however have fun. 8-)

 

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Posted: Mon Jul 17, 2006 5:23 pm 
Getting Side Ways
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AU gasket all fine
mechanics usually put coolent straight in afterwards, dont have to run water for a few days as far as I know and ive replaced 2 heads
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Posted: Mon Jul 17, 2006 6:38 pm 
Oompa Loompa
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also use AU headbolts as they have better robust threads than your standard EA headbolts.

 

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Posted: Mon Jul 17, 2006 7:26 pm 
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one tip, BE CAREFUL NOT TO SNAP THE TIMING CHAIN GUIDE WHEN YOUR REMOVING THE HEAD, THEY ARE AS BRITTLE AS A TWIG.

 

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Posted: Mon Jul 17, 2006 7:29 pm 
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When refitting the headbolts put a dollop of oil under the heads. This stops the bolts galling up on the head and giving false readings on your torque wrench. I have always run water for the first week but I'd never heard of it being used to help gasket seal. I always did it so I didn't waste coolant if there was any sort of leak

 

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Posted: Mon Jul 17, 2006 10:42 pm 
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i run straight water for a week for the same reason xhute0 does,,it's not cheap.

also use a thread sealer on the head bolts,,like graphite paste.

 

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Posted: Tue Jul 18, 2006 8:43 am 
Stock as a Rock
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Thanks for all the help and advice guys.
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