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Re: 9-5 cylinder heads Posted by SWEDECAR [Email]  (#112)  [Profile/Gallery]
(more from SWEDECAR) on Sat, 6 Jan 2007 11:35:44
In Reply to: 9-5 cylinder heads, Dave (SE Penn), Fri, 5 Jan 2007 18:44:26 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Cylinder heads cannot be swapped front to rear.
However, the head gaskets are market TOP and that front and rear gaskets are the same. So maybe, just maybe, they got the head gaskets installed upside down and that would alter the flow of coolant to the point that it starves the heating system???
The only similar story I can relate to is that back in Sweden years ago, I did a head gasket on a Fiat delivery van.
On that particular engine, it was possible to turn the head gasket front to back and vice versa but only one way was correct and the gasket had FRONT marked on it which should obviously should be toward the front of car.
I managed to turn it backwards and the problem that showed up was that after about an hour of driving, the coolant temperature slowly started to rise and the car overheated.
When cooled down, it took another hour of driving before it overheated again.
The reason for this was that in the head gasket it was a set amount of holes in different sizes beginning with small holes in the front and big ones in the back.
The size and location of the holes, forced the coolant to flow toward the back of head instead of just circulating through the front where the water pump is located.
So when I placed the gasket the wrong way, the coolant took the easiest path, "round and round we go" around the water pump and hardly reached the back of the engine in a steady flow and subsequently, the engine slowly over heated.
The Saab 4 cyl engine head gasket have the same setup with different size holes for the coolant but it is also other things that makes that gasket impossible to turn backwards.
Anders
, Sat, 6 Jan 2007 11:35:44 <-- Viewing This Message
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