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Discussion Starter #1
I was just curious if anyone could steer me towards a decent tech whose had more experience working on a 389. I know it has always run hot, but I just had the engine rebuilt and I thought that would help with the problem. My current mechanic is having a heck of a time trying to get it running just right. Maybe someone with a little more experience can help me get her back on the road.

I'm in the San Fernando Valley area...
Thanks, BB
 

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BB,

Here are a couple things to check that may help;

Pull the radiator hose off of the t-stat housing and see if the t-stat is upside-down, happened to mine. The spring should be on the bottom.

Measure the distance between the fan blades and the radiator fins, use a Mr. Gasket fan spacer (available from 1/2" to 2 1/4") and move the fan closer to the radiator. Fan Spacers can be found at your local auto parts store.

Did you get the pinging problem fixed?
 

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Discussion Starter #3
Thanks 05GTO,
The pinging is still the major issue. We have tried with a t-stat, without one, even drilled holes in one and tried it. Still too hot.
Tried retarding the timing, but only get less power at low speed and still too hot..
We are going to move the fan up closer to the rad, and we discussed blocking all other gaps around the shroud. It has a triple core radiator. He says he is going to put a 4 core in and try that too.
Going to convert from points to electronic.

My mechanic is cool and is letting me leave it with him for awhile so he can play with it...
I guess I'm just hoping that there may be some magician out there who could perform some magic on it.? I may have to find an old lantern somewhere and shine it up.
BB
 

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Also, check the lower radiator hose to verify that it is not collasping, was the water pump changed during the rebuild and was the radiator cleaned and restored by a radiator shop? Re: timing, How old is the gas in the tank, could it be bad? Have you checked the vacuum and was the block decked or the heads shaved?
 

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There really should be plenty of cooling there. Are you taking an actual temp of the motor? Or are you just looking at the stock gauges?? Removing the T_stat can actually cause more problems. The coolant will flow through the block too fast and not remove heat properly. That`s why racers use a restrictor, like a big washer were the stat goes to help slow the water down.
If the suggestions 05GTO doesn`t help, maybe check the water pump to be sure it`s the right unit for the car and that the impeller blade is still attached to the center shaft, I`ve seen them come loose. I`ve also seen wrong impeller blades installed from the reman place so the blades are backwards, which are meant for serp belts that cause the pump to run in the other direction. If the impeller is of the wrong design that will cause overheating problems that will be worse the faster the car goes.
Also if the block is full of crud, that will cause this condition too.
I also could not get my car to stop pinging when I first got it, they had the wrong distributor installed that was swinging the timing in the wrong direction under acceleration, I couldn`t get it to run right to save my *** until I swapped it out with the original one.
 
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