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why do head gaskets go? 

 

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Posted: Sat Jul 21, 2007 12:26 am 
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Shaun Peterson wrote:
Has anyone considered that the recommended method of torquing down these heads could have something to do with it? Because in the last few weeks I have had reason to rebuild some of these engine's & found that to tighten them down to 30ftlbs then go 90degree's is not really successful, I did notice after calculating the total torque figure (90ftlbs) that every head bolt was at a different setting!!!
This thread may help explain why the torque/angle method is the most consistent way http://www.fordmods.com/forums/viewtopic.php?t=42880 .

gogetta wrote:
when did they change the design of the bolts?
AU
Visibly the AU bolts have the thread running further along the bolt shaft.

 

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Posted: Sat Jul 21, 2007 1:25 am 
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locknut wrote:
gogetta wrote:
has anyone seen before the head mod where they tap another water circulation port into the rear of the cyl head and then run a coolant line to it.....no idea if it helps but mines going fine


YES! My new head has this, and I've not seen it anywhere else.

One of the lines from the overflow bottle has a T-piece in it, and it runs another 3/8"? hose to the rear of the head near the 6th cylinder chamber..


This is a mod by a company called All Head Services. They have "supposedly" research why the E series blow gaskets and have redirected coolant to help overcome this. When you get a head from them they also try to sell you there own version of a redesigned head gasket. From experience use a AU steel gasket and look after the cooling system and you should have no problems.

 

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Last edited by macxr8 on Sat Jul 21, 2007 8:19 am, edited 1 time in total.

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Posted: Sat Jul 21, 2007 2:22 am 
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e-series head gaskets blow due to bi-metal stress. Basically the aluminium head expands at a ratio of 3:1 compared to the cast iron block under heat. This expansion and cooling of metals at different rates causes head gasket failures.

try fitting an 82 degree thermostat rather than a 92 degree thermostat. It was used by most taxi mechanics to increase mileage between head gasket failures and basically ford only used the 92 degree thermostat to meet emission regulations. I know of some people that even run a 77 degree thermostats with no problems.

Fuel consumption will be the same, an 82 degree thermostat will still allow the ECU to go into lean mode while cruising.

 

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Posted: Sat Jul 21, 2007 9:20 am 
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opto wrote:
naughtyfalcon wrote:
opto wrote:
Put an AU head gasket on they don't blow, multi layer steel,


talk about miss information,,they do blow,just not as often...


You must be installing it wrong then or driving with a hell of a coolant leak.

miss information BS

There is always one smart a** on these sites, you offer info and someone wants to shoot you down.

I have been running 1 at 10:1 compression for ages, no probs.


ive seen more then a handfull of AU's need a head gasket.
By far the biggest head gasket issue i see at work is corossion. Keep the cooling system right with a decent coolant, not tectaloy or quick kool crap, and your half way to looking after your head
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Posted: Sat Jul 21, 2007 11:34 am 
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What would be a good coolant to use then?

 

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Posted: Sat Jul 21, 2007 12:01 pm 
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I use this coolant. It's around $40 for a 5 litre bottle but well worth it. I also top up with distilled water.

http://www.nulon.com.au/products.php?productId=ll#

 

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Posted: Sat Jul 21, 2007 12:23 pm 
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I use Ford coolant. $70 for 5L of concentrate. I know this will work ok, so decided the little extra was worth the peace of mind, and cheaper than coolant related repairs.

 

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Posted: Sat Jul 21, 2007 12:56 pm 
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opto wrote:
naughtyfalcon wrote:
opto wrote:
Put an AU head gasket on they don't blow, multi layer steel,


talk about miss information,,they do blow,just not as often...


You must be installing it wrong then or driving with a hell of a coolant leak.

miss information BS

There is always one smart a** on these sites, you offer info and someone wants to shoot you down.

I have been running 1 at 10:1 compression for ages, no probs.


there are those that talk s**t in these forums,,but to say a head gasket will never blow is total crap and you know it,,they will all fail at some stage regardless of the material they are made from....some people really like to blow there own horns don't they.

 

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Posted: Sat Jul 21, 2007 1:12 pm 
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I agree, saying they never blow is setting the bar very high. "Last a really long time" is closer to the truth I would think.

 

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Posted: Sat Jul 21, 2007 2:25 pm 
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xpression wrote:
Keep the cooling system right with a decent coolant, not tectaloy or quick kool crap, and your half way to looking after your head


i've been using tectaloy gold for that many years now its not funny, and not once have i had any issues with it. ran it in xf, ea, ebv8, ef xr6, el and my ba when i get round to it.

 

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