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Author Topic: 428PI still running hot  (Read 8298 times)
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Chris Thauberger
68 Gulf Tango Fiver
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« Reply #180 on: September 05, 2017, 06:31:12 AM »

An interesting journey to say the least. Troubleshooting any system is a exercise in patiece. Changing one element at a time is critical in determining the actual fault. Plenty of advice is this thread. I find it intriguing that ultimately the solution was your first instinct.

I am thinking about changing my fan clutch.  I spoke to Chris Brown a while back and he said I should confirm the application with the experts here.  The car build date is 11/25/67, auto, no a/c.  There is a C7ZE-B on it now, and read on a different thread it may not be correct.  What would be correct?

I don't think that is my problem.  I tried an aftermarket replacement for diagnosing, and it seemed to run a little hotter with that.

Since then, I rebuilt the engine (still @ .030) had the block baked and shot peened to clean water jacket. Re-cored the radiator, shop said it was flowing about 60% of what it should. Checked the impeller on the water pump, looked ok, cast iron impeller, vanes look fine.  I used a 160 degree Mr. Gasket stat and it still went over 200 degrees on a 15 minute test drive on a 70 degree night.

I haven't spent too much time tuning yet, but it just seems too hot!    Head knock

Thanks in advance,

Glad it all work out for you in the end.

Chris  Chug a Lug

« Last Edit: September 05, 2017, 06:32:45 AM by Chris Thauberger » Logged

1968 GT 500   SAAC 42 Concours Gold                     1966 Mustang drop top 4 speed Pony Interior

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« Reply #181 on: September 05, 2017, 08:28:10 AM »

     Everyone  take note of what the root cause ended up being for future reference idea


owner 6S477 HERTZ White w/Blue stripes-1of18-since 1974. OVER 3,500 drag strip runs made in it since then. My candidate for the "worlds Most drag raced Shelby" More added all the time.
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Paul Orr
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« Reply #182 on: September 05, 2017, 09:02:47 AM »

There were many contributing factors.  After correcting the problems with the water passages, the radiator, the thermostat, and the head gaskets, I thought my cooling system should be 100%.  I tested the fan clutch by replacing it with an Autozone replacement unit, since it seemed to run a bit hotter with that one, I assumed mine was good.

There were lots of things discussed and many of them helped.  The big lesson here is DON'T TRUST CHEAP PARTS!!

I still have some things to address, but the car is drivable and almost becoming trustworthy.

Thanks to all who helped!   Chug a Lug


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« Reply #183 on: September 11, 2017, 05:31:02 AM »

Paul,  glad to see you got fan clutch installed and works as advertised!!

thanks chris

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