View Full Version : TR2/3/3A ???? TR3 Intake manifold port matching????

07-08-2009, 07:59 PM
After tearing down my engine for rebuild I found out that the head I have my not be correct. The casting number is 302137 (the first 3 may be a 5) The number stamped on it is 510084. The original block for the car is TS15252-E. It is a an early car with the high port head. I know there is no problem with matching the head with the block, but the intake ports on the manifold are 1 1/2" were the head is 1 5/8". The car was run for some time with this miss matched set without any problems that I can find. The intake that I have is the early high port log type with out the boss on the crossover tube (302119). I was thinking of matching the ports on the manifold to match the head but I'm concerned about how much material would be left on the outside. Also all the intake gaskets seem to be the same for the TR3 thru TR4A. Would you also cut out the gasket to match the ports? I don't have the gasket set yet to see what size holes they have. Any ideas.

07-08-2009, 10:34 PM
I had a similar problem but not exactly the same. The short answer for me was someone had put a TR2 head on my TR3. One quick way to tell is the location of the intake ports. On the TR3 they are at a different "altitude" form the exhaust ports, while on the TR2 they are more or less at the same altitude.

I wish I had found this out before I had the head rebuilt for no lead fuel.

07-10-2009, 05:53 PM
Come on guys I could use some help on this one. Thanks for your reply Adrio.

07-10-2009, 07:36 PM
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]The car was run for some time with this miss matched set without any problems that I can find.[/QUOTE]

Then I'd leave it alone. My $.02

07-11-2009, 12:50 PM
I agree, I would leave it alone (my $0.02 worth, which gets you up to 4 cents)&gt; I have been driving my TR3A with the mismatched TR2 head on there since I got the car in 1979 with no problem. I think the ports on the TR3A manifold a fair bit bigger then the ports on the TR2 head, at least if not more, then the difference you describe.

07-11-2009, 04:16 PM
I took the engine to the machine shop today to get checked out. They said they would take off the leading edge on the intake manifold and all would be good. No problem since the head ports are larger than the intake. It would create a problem if it was the other way around. That $0.04 will go a long way with the rebuild.

07-13-2009, 05:01 PM
for the head part numbers, go to Terry Anne Wakemans site. https://www.tjwakeman.net/TR/FAQ_heads.htm

Sounds like you have a Tr4/4a head with Tr4a manifold. I'd leave the intake manifold alone.