Thanks for the response. I plan to take it in and get them to put a timing light on it. That will just cost $20 they told me. It also seems to not have as power also, which I assume could be timing also. Will post after that. May need to change the thermostat, will see. Thanks again. Leont

 

when you pulled the plug was the piston at the top of the cylinder when the timing indicator was at tdc? the temperature gauge sensor, fan clutches can cause over heating too. if the timing chain jumps a tooth that can cause over heating and lack of power.

 

Yes. Mark was at 0 and had my grandson turn the engine while I had my finger over the hole, so sure that was right. Hope to get the timing checked tomorrow will let you know. Thanks again.

 

you can look for vacuum leaks by spraying carburetor cleaner or starting fluid around the vacuum hoses with the car running and look for a change in the idle. don't smoke. did you check to see if the vacuum advance is working and see if that vacuum line is ok?

 

Timing checked out ok at TDC with the light. Changed out the thermostat to no avail. Would a vacuum leak cause it to run hot? Don't smoke,(Respiratory Therapist) Will check for leaks. Power has decreased also but starts right up even when hot. Thanks for the input. Leont

 

maybe multiple issues. start with the most common and easiest to fix of running issues. that being vacuum. check the vacuum advance diaphragm on the distributor. make sure there is vacuum at the distributor, then disconnect the distributor vacuum line at the source and suck on it. you should not be able to pull any air through the diaphragm on the distributor. you did replace the rotor when you replaced the cap? need to fix running issue first, because it may very well be the cause of the over heating. but holy smoke, I looked up the cost of a fan clutch for the 75 107. OUCH!

 

Brookings, Was in a thrift store in Memphis, Tn. the other day and found a new timing light, cheap! Checked the timing myself just to see if it worked and I think my local mechanic was off. He must have been looking at what he thought was O but was actually a hole. It was closer to 20. I set it at TDC and it is running great. Only problem is the overheating. I now think it must be the water pump. I flushed the radiator and also pulled the top hose off and started the motor (it was warm enough to open the thermostat) very little flow. Will remove the water pump when it cools down, 108 here in Ar. right now. Hope all this helps someone and again thanks for your input. Need a vacuum gauge now.

 

By the way I did change the rotor and sucked on the vacuum advance and couldn't move it. When I pulled the dist. out earlier I had to free up the vacuum advance plate and lightly lubed it so it would move freely. Thanks again.

 

the impeller could be loose on the water pump alright, but rare. when you flushed the radiator, did you run the flush through your block too, flushing the whole system? the temperature gauge sensor could possibly be bad. those are usually under $20. My overheating problem on my 129 turned out to be the fan clutch. I looked at yours at autohausaz.com and it was about $400. I'm lost for answers if it's not one of these issues. Good luck!

 

Put a new water pump on and has new thermostat. Still running hot, around 200 but it is 85 to 90 today. Now it is surging when I first start it, it stops after a couple of minutes, think it is a separate issue. Idles at about 1500 and can't adjust it down. May be a problem in the cold start valve, think it is leaking. Have to get some parts for my daughters car tomorrow so will have to wait on this one. Thanks again for your input.