Need Help: Water Pump Removed - Heating Issue?

[Vince@Meanstreets]

I would not put that pump back on. Get a quality pump with a anti cavitation plate impeller design. They work much better.

[camaro1969]

Originally Posted by GregWeld

Plenty of fan!


Okay --- if the fan is RUNNING all the time -- it's going to cause blockage at cruising speeds when it's not needed at all....


A simple fan switch and relay -- such as this, or similar, would be all that is needed to add fan control. It simply shorts to GROUND when the temp reaches "X" -- you can buy these in various temp ranges.


http://www.summitracing.com/parts/sum-890017/overview/


Do you have Air Conditioning?? If so then it gets a little more complicated and you'd need a Trinary switch in the A/C system.


Stupid question -- but you said the thermostat is "new".... but hopefully it's not installed upside down? Did you have this issue and is that why a replacement thermostat??


ASSume the system was "Burped".... i.e., after filling -- the cap was left off the radiator -- until it opened and you could see hot water circulating in the radiator. Sometimes this can create a mess if you fill it too full as there can be air trapped and when the thermostat opens you get a big belch of water out of the radiator... so I always leave it low -- and add water after it's run a bit and the burping is all done.



Next up -- is -- once you get 'er back together -- measure at the thermostat housing. Also at the inlet hose and outlet hose. Also a couple places around the head to check for hot spots. You should have at least a 20* DROP in temp from the top of the radiator where the hot water comes in = to the bottom where it re-enters the pump. That will check for adequate flow in the radiator.

THEN after you've ruled out a cooling system malfunction --- LET'S DISCUSS where your timing and timing curve is set -- and give us some details about that and the motor -- aluminum heads or not - big cam or not - initial timing - total timing - and springs used to set the curve -- then is it vacuum advance or not and has that been checked to see how much advance that's pulling in. And at what vacuum is it adding curve.

Do you have a dial back timing light??

When it is running all the time, isnt that how the original set up was back in the day, when the fan was attached to the water pump pulley? I have a temp switch, never bother to install because having the fan running at all times didnt seem like a bad idea.

no AC on the car.

Thermostat was installed correctly. I ran no thermostat for about a month a few years ago, then installed one to manage problem with overheating, and then recent put a new one in since i was still getting over heating issue.

I am not putting the old water pump back on. I bought an AC Delco water pump and will be replacing with that. I will then burb the system when i put new fluid/water in the car.

i will be putting the pump back on the car either today or tomorrow. I will check timing after I have done the above. I do not have a dial back timing gun, that isnt to say I cannot get one. Is there any on Amazon that i can get? (i have amazon credit, figure i use it )

[camaro1969]

Originally Posted by Vince@MSperfab

I would not put that pump back on. Get a quality pump with a anti cavitation plate impeller design. They work much better.

Replacing with AC Delco #252 592

http://www.autopartswarehouse.com/sk...AC252-592.html

[Vince@Meanstreets]

Originally Posted by camaro1969

When it is running all the time, isnt that how the original set up was back in the day, when the fan was attached to the water pump pulley? I have a temp switch, never bother to install because having the fan running at all times didnt seem like a bad idea.

no AC on the car.

Thermostat was installed correctly. I ran no thermostat for about a month a few years ago, then installed one to manage problem with overheating, and then recent put a new one in since i was still getting over heating issue.

I am not putting the old water pump back on. I bought an AC Delco water pump and will be replacing with that. I will then burb the system when i put new fluid/water in the car.

i will be putting the pump back on the car either today or tomorrow. I will check timing after I have done the above. I do not have a dial back timing gun, that isnt to say I cannot get one. Is there any on Amazon that i can get? (i have amazon credit, figure i use it )

One of the purposes of an electric fan is to run and cool as needed. As Greg states it running at speed causes air turbulence that can impede air flow through the rows and fins at cruise speed.


Water pump I would recommend within that price range. SUM-312449. At summit racing.com

[GregWeld]

I own this timing light...



http://www.amazon.com/INNOVA-5568-Pr...k+timing+light



It gives me RPMS... timing - Dial back - voltage.... Kinda handy depending on what you're working on.

We can walk you thru how to plot your TOTAL TIMING -- how to build a rough timing curve -- and of course most know how to set initial. It's the curve and the total that are important...

[Vegas69]

If that is a knock off fan it may be really under powered. If that is the case, I could see it impeding your high speed operation along with your low speed problem. I agree with these guys, put it back together with a good pump and verify your temps before you go much further.

[GregWeld]

Depending on how it's wired - it might not even be getting full voltage. I bought a '37 Ford out of Bakersfield from a guy - and he said "yeah it will overheat if I sit at a stop light too long".... got the POS home and the wiring was so poor - the fan was seeing 10 Volts... Put a proper relay and some proper gauge wiring and it was FINE...

[camaro1969]

Vince - Thanks, the Summit one and the AC Delco one are pretty much identical. I will be putting the AC Delco on today.

Greg - Thanks, Id like to walk through the timing when i get to that step.

Todd - A lot of guys from another forum are saying to cut my shroud off since its stopping airflow. I should be going back to a fan mounted to the water pump pulley. As well, talking about adding rubber louvers. I will be mounting my water pump today, should be getting my temp and timing light this weekend.

Greg - I will check what volt i am getting to the fan and report back.

[GregWeld]

Originally Posted by camaro1969

Vince - Thanks, the Summit one and the AC Delco one are pretty much identical. I will be putting the AC Delco on today.

Greg - Thanks, Id like to walk through the timing when i get to that step.

Todd - A lot of guys from another forum are saying to cut my shroud off since its stopping airflow. I should be going back to a fan mounted to the water pump pulley. As well, talking about adding rubber louvers. I will be mounting my water pump today, should be getting my temp and timing light this weekend.

Greg - I will check what volt i am getting to the fan and report back.

Personally I don't think you're "overheating" --- so I wouldn't do anything to the shroud or fan etc until you've got those temps double checked. I know you know that - but stating this for others as many people read this stuff.....

[camaro1969]

Originally Posted by GregWeld

Personally I don't think you're "overheating" --- so I wouldn't do anything to the shroud or fan etc until you've got those temps double checked. I know you know that - but stating this for others as many people read this stuff.....

of course!