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Posted: Sat Jul 21, 2007 1:44 pm
by Mats
Barry: are you using standard hardware? Surely you are nowhere near yield with 88Nm?
Posted: Sat Jul 21, 2007 3:10 pm
by x-rad
Pressure check heads is professional job..they have some kind of dye for leaks in coolant as well as mount for the head chamber testing
example:
http://pcwww.liv.ac.uk/~goodhew/Student ... esting.htm
I think there is an Alfa tool for checking cylinder heights, but I am sure you can get a calibrated block and do it yourself...
Posted: Sat Jul 21, 2007 3:59 pm
by Zamani
Hmm.... you can turn the liner easliy eh? I think it is one of your liner o-rings. That's why the head gasket looks ok I think. I had a slow leak before but it was small enough that I could use one of those alumaseal things.
Posted: Wed Sep 12, 2007 9:45 am
by fredcsl
Hello guys,
Now after few weeks off i tried some different tests on my engine to locate this bloody leak and still nothing !!
First test:
8 Bars in the coolant circuit filled with water + fluorescine and try to reveal leaks with black light, oil pan removed to see the sleeve base and o'ring area => NOTHING !
Second test:
8 Bars in the combustion chamber, (crankshaft locked) and look in the coolant to see any potential bubble => NOTHING !
I looked everywhere to detect any crack, any defect, everything is ok.
I disassembled again the heads and there is a lot of "mayonnaise" stucked on the sleeves, means the leak is great.
Disassembled the water pump as well, nothing except mayonnaise of course.
It drives me crazy !
Posted: Sun Oct 14, 2007 5:34 am
by tectoteam
Hi FredCsl.
what are the news ? did you solve your problem ?
i had some test when torquin heads.
1st i torque them to 25nm.
after, two options tried.
- torque them to 88nm its seems to be 110°
- torque them at the 240° says by alfa, and it looks like to make 140nm.
a noticeable difference...
Posted: Sun Oct 14, 2007 7:07 am
by Barry
Mats,Fred,std hardware-88Nm`s torque.When I use my rings I will go as high as 100Nm but no more..If I have problems after 100Nm,I use the ARP stuff.That kills any problems dead.
This all on Victor Reins or Gaurni Auto gaskets only.
Mats,what do you torque v6?
Posted: Sun Oct 14, 2007 7:11 am
by Mats
I have honestly never torqued down a v6 head, so I will tell you after it happens.
Posted: Sat Oct 20, 2007 3:40 am
by fredcsl
Hello guys,
I still have one head off but i think i found the problem.
The plug on the block which drives the oil in the head, you know the one with a o'ring, was not matching correctly in the head hole.
I discovered that by putting the head on the block without gasket.
I put a light behing and saw that a lot of rays were going thrue.
So i decided to bore just 0.1mm more the hole in the head and now everything is matching correctly. I'll put more paste to avoid leakage.
Before when i was torquing the head, i torqued on the plug and not on the gasket surface which obviously let the oil and the water going everywhere.
I don't know if i am very clear
Regarding the torque value, i can not go with the 240° i am too afraid to brake a stud. So i prefer going for 110 Nm which seems to me a good value for this stud diameter.
Posted: Sat Oct 20, 2007 3:40 am
by fredcsl
Hello guys,
I still have one head off but i think i found the problem.
The plug on the block which drives the oil in the head, you know the one with a o'ring, was not matching correctly in the head hole.
I discovered that by putting the head on the block without gasket.
I put a light behing and saw that a lot of rays were going thrue.
So i decided to bore just 0.1mm more the hole in the head and now everything is matching correctly. I'll put more paste to avoid leakage.
Before when i was torquing the head, i torqued on the plug and not on the gasket surface which obviously let the oil and the water going everywhere.
I don't know if i am very clear
Regarding the torque value, i can not go with the 240° i am too afraid to brake a stud. So i prefer going for 110 Nm which seems to me a good value for this stud diameter.
Posted: Sat Oct 20, 2007 3:40 am
by fredcsl
oops it seems i clicked too fast ...
Posted: Sun Oct 21, 2007 1:01 pm
by x-rad
I really hope you got it solved.....makes me feel like my car is worth keeping