HELP#3 IS OVERHEATING 400 WHILE ALL OTHERS CYLS ARE FINE 300

john9144 · Post by **john9144** » Sun Dec 19, 2004 11:17 am

All the other cylinders run at 250 -300 I have done every thing I could. I have 2 vdo head temp gauges and interchanged them between all the different cylinders and have confirmed it is not a faulty gauge or coulper. the coulper is under the plug. I have checked all the valves and gaped them the same.0015 I have chrome molly push rods. I have switched jets in the carb. I have also messed with the timming. nothing has helped I can drive at 75mph and #3 will run at 360 while the other run at 250-300 if i go to 85mph #3 will hit 400 while the others hit 300-325 the most. when I back off it will drop very guickly I tried leanning it out and riching it up and it dose not make a big change. The engine is a 2.3 with webers and mallory 6a and unilite distributer.
I am running kelly hunters headers with a flowmaster muffler at the end it sounds great everybody thinks it is a 6cly in it and it has no back pressure.
ANY HELP WILL BE GREATLY APPRECIATED

Bruce2 · Post by **Bruce2** » Sun Dec 19, 2004 1:39 pm

What cooling shroud are you using? Does it have an oil cooler in the shroud?

sandman2332 · Post by **sandman2332** » Sun Dec 19, 2004 3:20 pm

Hey John, have you checked the timing? from what you say the engine temp raises 40 degree's or so on number 3 when you increase speed(rpms), and the other cylinders raise 25-75 degrees at most. since all 4 cyl. are raising about the same in terms of temp, I dont think the problem is isolated to #3. Its just the one that caught your attention. If you are running the dog house style oil cooler it is not unusual for #3 to run a little hotter than the rest. however if the timing is advancing to far too fast, it could cause the temp to increase through the entire engine. the temp would also decrease very quickly when you dropped in speed(as the timing returned to base).

Guest · Post by **Guest** » Mon Dec 20, 2004 5:36 am

The timming is 12 to 27 and I am running the stock type 4 shroud with the stock oil cooller installed but the door has been locked down to give the most air flow to the cylinders. I have been all over with the timming and this is the best place for it . Some body said that I could have the wrong distributer in it . That it could be a dizzy from a type 1 or 3 and that dizzy has different timming for cyl#3 causing the problem. The #1 cyl runs at 250 pushing 300 and #3 is running 350 to 400 I just cant believe that #3 runs 100 hotter that all the rest and another thing is that it cooles down much faster that the otheres and heats up faster to.

prerunner1499 · Post by **prerunner1499** » Mon Dec 20, 2004 1:16 pm

Just a shot in the blue here but,,,,,What heads do you have?,,, it could be that the head just needs a little tweaking for #3 to get a little more flow through to cool it a bit.
Check for "boogers" in the heads fins, Most need a little cleaning up from casting slag between the fins, through the (flow through holes) for lack of a proper word.

Guest · Post by **Guest** » Tue Dec 21, 2004 5:34 am

good idea I will check that.. last night I went for a drive with a new ign box a mallory 685 and that box lets me adjust the timming while I am driving. I was able to retard it on the fly. the #3 cyl was always at 350 to 400 while the others stayed at 275 and 300 there is always a 100 degre difference between#3 and the others. and #3 heats up and cools down faster than the others

mschilling · Post by **mschilling** » Wed Dec 22, 2004 6:21 am

My first thought is that you may be the only person who has done that type of a test. Unless someone else has done the same thing, we can't be sure that all bug motors have the same readings. VW somehow knew that #3 ran hotter so the lobes on the dist were altered to have #3 retarded relative to the others. Interesting.

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Wed Dec 22, 2004 4:05 pm

Ummn, I did the same tests extensively on all 4 cylinders to develop both my TI and TIV cooling systems. See some results here

http://www.aircooledtechnology.com/type1/dtm/index.htm

There is a simple way to solve the problem that you have with the #3 running too hot.. There is a product especially designed to remedy this design flaw and engineering quirk.. Here it is
www.massivetype4.com

Its the cooling system, and nothing more.. I have studied these systems for over 2 solid years of my life and spent upward of 25,000 on parts and fuel to solve the problems..

Guest · Post by **Guest** » Fri Jan 07, 2005 3:27 pm

On the kits and engines you sell jake do they need the cooling system b/c this engine is maybe ready for a upgrade?