Is there a such thing as to much antifreeze? After waterpump install on test drive the temperatures were 10-15 degrees warmer than before. The only thing I can think of is I put all antifreeze back in and is probably over 90% antifreeze. Thanks

 

it needs to burp and get the air out of the system , you could try putting it on a hill or ramps .. what temp thermostat are you running

 

Have 160 but going to put 180 in tomorrow, just added Holley dual sync distributor so it will control timing now.

 

What water pump? Sure it's got correct rotation? Serpentine ones look near identical on outside. All pumps aren't created equal. Air in system as mentioned. Did timing change with new controller? Low timing will do it too.Too much antifreeze won't make a difference like that. Yes..water is a better coolant....but I wouldn't expect it to change this situation unless it was really on edge before

JIM

 

I'm thinking if rotation was wrong it would be a LOT more than 10 degrees hotter. None the less. What water pump? A high flow pump without a high flow thermostat won't work. Perhaps you replaced a high flow with a standard? Perhaps you got the cheapest pump you could find? And yes, Perhaps you haven't burped all the air out of the system. which can be a pain.

 

Rotation, compare old pump blades to the new pump blades.

 

10-15 warmer at idle in park or going down the road?
Get some water in it....distilled.....dilute the antifreeze if it is at 90%......I run 75% water to 25% antifreeze in Texas.

Jebby

 

Is it alot warmer outside since you last drove it? My car stays down around 165F when the outside temp is around 60F. Once its closer to 70F outside then it climbs to 175F. All I can think of mechanically is that if you removed the thermosstat while replacing the pump, that it went in backwwards and that might effect it until it opens but it would cool down quickly after it openned.....I run 50/50 out of the bottle. Its pretty cheap around here

 

Hi edusmc1, I thought your question concerning 'is there such a thing as too much antifreeze' was a good one. I had always heard that too much antifreeze could actually hurt cooling. I'm no expert on this topic, but I did stay at a Holiday Inn Express last night. (sorry). While I'm not an expert, I've worked with some great mechanics along the years when I worked in an auto shop during college and later while crewing for a Winston Cup team. What I do remember is that the few times I remember this type of conversation it always came back to 'run a 50/50, no higher' (no higher on the antifreeze).

So I did a google search because I was interested. I found a lot of interesting stuff and believe me I know that you can't believe everything you see/read on the internet. But, I found several references to 'having too much antifreeze can hurt cooling ability - including one I'll paste in below.

BTW, another thing I do before I ever install a 'rebuilt' water pump is buy a gasket and take the rear plate off the pump and check to see if it was really rebuilt, if the impeller is good, etc. I do this because I once installed a nice 'rebuilt' pump, had issues, pulled the back off, and the impeller was half rotted.

Quote I referenced: "Pure antifreeze lacks sufficient heat capacity to keep the engine cool. In fact, if you put pure antifreeze into the cooling system, the heat-transfer capabilities are lowered by 35%, and it could really damage on the engine, especially in hot weather." If this is true, then 75/25 could have a negative effect vs. what you had before if you were running 50/50.

Hope this helps. Best, Paul

 

It is very simple: Distilled Water has a thinner boundary layer, Antifreeze by itself has a much thicker one........the thinner the boundary layer, the better heat transfer and cooling. This singular thing determines how well a liquid is as a coolant.....Antifreeze is not "coolant"....it is anything but.
I have literally fixed overheating issues down here by running 75%/25% water to "coolant"......

Jebby

 

Just do a Google on the optimum ratio of coolant and water. Using 100% antifreeze is a LOSER. Antifreeze is mixed with water in auto cooling systems for two reasons:
1) it raises the boiling point of the coolant mixture so you will be less likely to overheat:
2) it has corrosion inhibitors in it to prevent 'metal erosion' on the inside of the engine and minimize and buildup of 'coolant sludge'.

Also, if you installed a Hi-Flow water pump, you will be adding more heat from the extra 'work' the pump is doing...and the flow rate may be too fast to dump enough heat from the radiator as it passes thru it.

If I were you, I would dilute the coolant with distilled water (drain off about 1 gallon of existing coolant and save it for later use; then add 1 gallon of distilled water. That should give you a good mix. Changing the mix ratio will improve the heat transfer from the radiator and will help to alleviate your issues. If it does not completely solve your problem, I would advise to put the stock water pump back on the car.

 

I'm running the Koolflow high flow pump , I will be draining and adding distilled water tomorrow. Hope this brings the temps back to where they were. It was running 189-193 down the road and in traffic or stop light it would creep up to 203/205 but go back down in matter of seconds after start moving. After water pump and all antifreeze added its 200/205 cruising and 210/211 at light.
Thanks for you pointers Sir
Robert USMC Retired

 

Thank you Sir! I'm draining and add distilled water and making sure my thermostat is high flow like the Koolflow water pump.