[theamcguy]

Just by looking at the radiator through the cap opening is not going to be enough to determine flow. I have been trying to think of a way to test flow but cannot think of one. Go back and look at post #17, the pump, the impeller, and the divider plate all have to be correct in order for the pump to pull enough vacuum to ensure correct flow.

[jray1]

Originally Posted by theamcguy

Just by looking at the radiator through the cap opening is not going to be enough to determine flow. I have been trying to think of a way to test flow but cannot think of one. Go back and look at post #17, the pump, the impeller, and the divider plate all have to be correct in order for the pump to pull enough vacuum to ensure correct flow.

Will be pulling the pump again tomorrow to recheck all of it. Just wish I could get a 100% confirmation on the divider plates. The ones I have with my 8 bolt water fit inside the timing cover housing and only 1 gasket is used. If this is wrong it could be part of my problem.

[1967Tempest]

When you pull the pump please take some pictures. I would like to see what the pump looks like.

I would also like to see what the fan looks like. I have a pretty big fan and I would like to see yours and the shroud.

I also found this the other day. Looks cool and is a great diagnosis tool. I would get the Chevy one as the Pontiac one looks too big for no good reason..

http://www.coolviewthermostat.com/

Dave

[jray1]

I will take some pics to post tomorrow that may be a big help.

[jray1]

After a long talk with Jim Butler from Butler Performance yesterday I decided to wait before pulling everything a part again and recheck the basics. Great bunch to deal with if you haven't already. After our discussion we determined my timing wasn't set correctly (needed set with vacuum hooked up). Done this morning only to discover that at 2500-3000 rpms I am getting about 45 degrees of total timing (not good). Got to get that fixed before going any further.

[jray1]

Also there was mention of a possible issue if I used felpro head gaskets (which I did) concerning the water jacket holes in the gasket. The water jacket is a 3/8 and the gasket is 3/4 which gets it real close to the compression ring in some cases. I hope that's not my problem.

[rexs73gto]

I blew both head gaskets when I put mine together about 10 months ago because of the problem with the felpro head gaskets. All it did was a small hic-up & blew the head gaskets. I to talked to Jim about this problem. The best thing to do is replace the head gaskets with the ones Jim says to & be done with it. His gaskets don't have that problem . It sounds like you blew your head gasket(s) as I did. Your problem sounds just like what i went through until I to talked to Jim about the problem. Change them & be done with it. You'll be much happier in the long run by doing it. Then your problem will be gone & you can drive the car without worry.