Re: 1972 Saab 96 V$ Overheating - Saab Vintage Models Bulletin Board - Saabnet.com
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Re: 1972 Saab 96 V$ Overheating
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Posted by Glenn Fearon [Email] (more from Glenn Fearon) on Mon, 30 Oct 2023 10:34:50 Share Post by Email
In Reply to: Re: 1972 Saab 96 V$ Overheating, BobD, Wed, 25 Oct 2023 12:05:15
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Hello - I am posting an update based on my work over the weekend.
Fist I ordered and installed a 7# pressure cap for my expansion bottle. I confirmed that all of the other hoses were tight and I plugged the the vent that exists near the neck of my bottle. I ran the engine and it did seem to raise the temperature at a slower rate but it quickly accelerated into the red and I shut the engine down.
At that point I decided that I was going to have to see if it is the head gaskets. This top level engine dismantling is a first for me. I followed the step in the manual that I have and was able to remove all of the components including the heads. I have attached a photo sheet to this update with images and some notes/questions.
I found a broken loose black washer? or spacer inside the valve cover on the passenger side. I didn't see any spacers missing in the rocker arm assembly or valve springs, but as I say I don't really know what I am looking at here. When I removed the manifold I could see that 2 of the ports for the front 2 cylinders have a thin copper plate with a small diameter hole in it but the rear 2 cylinders do not. Is that normal? it seems odd to my mind. There is a photo of the manifold and a closeup of the copper plate. I didn't see any gaps or breaks in the head gaskets. I compared the new replacement ones I ordered with the one on the head and it seems identical. This also confuses me as some of the ports in the head are completely blocked by the gasket. Is this really the correct gasket for this engine. I confirmed that my engine #MX 236264 is a 1.7 liter engine and I assume it is correct for a 1972 96. The packaging on the gasket set says it is for a later 96 - I ordered it from Saabits. When I look at the otherside of the heads you can see that the deposits on the valves is different when I would expect them to be the same. I wonder if the differences is related to those copper plates covering only 2 of the ports.
Obviously, I am very hopeful that I can count on this forum to share their knowledge and insight so that I can finally get this cleaned up and properly reassembled.
I plan on taking the heads to a local machine shop to confirm that they have not warped and clean them up before reinstallation. Is there anything else I need to ask the machine shop to do with the heads when I drop them off?
I was told by a neighbor that I need to use a air compressor to blow air into all of the ports around the cylinders in the engine block to make sure there aren't any blockages - is that a good idea or am I going to damage soemthing?
Sorry for the long post _ I am facing a learning curve here. Thanks again for all of the input.
Glenn
Redlands, CA

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