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cylinder head cooling mod 

 

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 Post subject: cylinder head cooling mod
Posted: Tue Jan 15, 2008 11:47 am 
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I was reading on another web site where to improve the cooling on the Ford I6 you can drill and tap a hole in the rear most water jacket on the head and run a hose from the top radiator hose to the tap in the head.

The guy who posted it said it will cool the rear of the head quicker and better and help the head gasket survive longer.

Now I am trying to work out the water flows in the engine by doing this and the logic of doing what he said.(I am sure he is right) Anyone have any ideas why this would help or who have done it themselves.

 

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Posted: Tue Jan 15, 2008 12:07 pm 
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not sure mate i have also read this but not gain to try for myself unless i have seen it done and 100% convinsed that it works

 

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Posted: Tue Jan 15, 2008 12:10 pm 
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its a good idea seeing as though its usually the rear where the head gasket goes

 

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Posted: Tue Jan 15, 2008 1:57 pm 
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Really they normally fail at the back?
Mine went at the front
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Posted: Tue Jan 15, 2008 2:14 pm 
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my XH just did a headgasket on the back of 6 and between 5 and 6

 

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Posted: Tue Jan 15, 2008 2:42 pm 
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Doesn't work. Seen 2 cars with this mod and the gasket died again in the usual I6 manner in the usual I6 timeframe.
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Posted: Tue Jan 15, 2008 4:43 pm 
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i just did my head gasket.. near the front cylinders, like around 1,2,3, maybe bit on 4,5.

 

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Posted: Tue Jan 15, 2008 7:22 pm 
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Of all the headgasket failures I have seen ( on the Ford OHC I6), and I have seen sh!t loads, the biggest cause was not changing coolant, so inset the corossion.
The other thing you see is oil leaks on the inlet side. I was doing these under warranty on the EF & EL's.
Another failure was head bolts, the heads came off, right at the top, and also saw them come off when puting the heads back on, and we weren't allowed to fit new head bolts ( FoMoCo's instructions). To tight to shout some head bolts, d!ckhead engineers.

 

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Posted: Tue Jan 15, 2008 7:36 pm 
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cjh wrote:
Of all the headgasket failures I have seen ( on the Ford OHC I6), and I have seen sh!t loads, the biggest cause was not changing coolant, so inset the corossion.
The other thing you see is oil leaks on the inlet side. I was doing these under warranty on the EF & EL's.
Another failure was head bolts, the heads came off, right at the top, and also saw them come off when puting the heads back on, and we weren't allowed to fit new head bolts ( FoMoCo's instructions). To tight to shout some head bolts, d!ckhead engineers.



have to agree with that

 

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Posted: Tue Jan 15, 2008 7:50 pm 
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Thats a practice by all head services.

A good try, but sure, Im not convinced.

Im 100% certain the composite gaskets to blame.

 

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Posted: Tue Jan 15, 2008 9:29 pm 
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out of curiosity, what is the "i6 manner" and "i6 timeframe"?

 

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Posted: Tue Jan 15, 2008 9:37 pm 
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Bundy Rum wrote:
out of curiosity, what is the "i6 manner" and "i6 timeframe"?



most common 120 000km to 160 000km timeframe
leaks water into cylinders.

second most common same time frame
external water leak from headgasket on exhaust side of block.


then in no order
oil leaks on intake side

broken head bolts (most common i've seen is second from the back on exhaust side)

oil leaks from feed to chain tensioner through the gasket into timming cover. (causes very noisy lifters ans noisy chain, if left to long damage to lifters)

blowing from one cylinder to another

 

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Posted: Tue Jan 15, 2008 10:21 pm 
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tickford_6 wrote:
Bundy Rum wrote:
out of curiosity, what is the "i6 manner" and "i6 timeframe"?



most common 120 000km to 160 000km timeframe
leaks water into cylinders.

second most common same time frame
external water leak from headgasket on exhaust side of block.


then in no order
oil leaks on intake side

broken head bolts (most common i've seen is second from the back on exhaust side)

oil leaks from feed to chain tensioner through the gasket into timming cover. (causes very noisy lifters ans noisy chain, if left to long damage to lifters)

blowing from one cylinder to another


Another one I found was the Dual fuel vehicles broke head bolts more often then petrol only cars.
I also found that the head bolts that they changed to ( AU spec) are exactly the same as the ones used in the Mitsubishi 3.5lt V6 engines.

 

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Posted: Tue Jan 15, 2008 10:26 pm 
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never seen broken head bolt before,seen plenty of gaskets

 

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Posted: Wed Jan 16, 2008 9:55 am 
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hmm mine has just hit 170k and is using water, seems to be a slight leak at the front of the engine on the exhaust side... doh... tossing up pulling the head and putting a new gasket and bolts in or buying a modified AU motor instead...
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