93 convertable. Has anyone had a problem with the engine temp running hotter after a water pump change. My mechanic says it has nothing to do with what he did, but I only noticed the problem when I got the car back from the shop. Any help would be appreciated. Thanks Andy

 

Helps to post the year, but the system may need to be burped.

 

I have an 88, i was having the same problem. I cant make any promises, but i fixed my temp. so here's what i tried.
1- go buy "wetter" it lowers your engine coolant and temp
2- do a radiator flush
3- intall a 160 degree thermostat
4- open up or change air induction. the more air the cooler it runs.

that did it for me-
good luck

ps. check serp belt and pullys for shreading

 

We need to know the year. If you have a 92 to 96 the mechanic may have the thermostat in backwards, or the system may need to be burped of air. It is possible someone had a lower temp thermostat and he replaced it with a higher temp OEM one.
In other words how hot was it running before, and what temp is it running now?

 

give us some numbers

 

Sorry to say your 'mechanic' is wrong -- it had to have something to do with what he did (or didn't do).

Did the 'mechanic' drain most of the anti-freeze?

Possible issues:

1. what brand water pump -- if aftermarket, could be pumping less
2. what brand thermostat -- should have been replaced and if so, was it a quality brand (e.g. ACDelco) -- and even if it is a brand name, there's always the chance it is malfunctioning or had a mechanical assembly problem
3. what brand/quanity of anti-freeze -- assuming your car is a 94 or earlier -- it DOES NOT USE DEXCOOL, uses the old style greeen (ethylene glycol with silicates).
4. what water was used to add to the anti-freeze, was it distilled or tap or worse well water (which often has lots of minerals).
5. was it properly filled and capped quickly -- or did the 'mechanic' try running it a bit to 'burp' it, which often allows spot boiling inside the engine and can cause air pockets.
6. might the 'mechanic' have allowed some gasket material to get into the head and has floated into the internal passageways causing a blockage?
7. might the 'mechanic' have miss-installed the waterpump drive-shaft 'connector' and the waterpump is not being spun firmly o at all?

One last thought, without taking the cap off, have you run the car through 3 complete warm-up/cool-down cycles? If not, do that first -- just in case it is just because the anti-freeze and the water have not mixed yet.

 

The above posts offer some very good information, but I might add that you need to check your fan(s.) If you have an aux fan in front of the condensor as well as the regular fan behind the radiator, you need to check them.

One of them is controlled by the ECM, while the other is controlled directly by a temp switch in one of the cylinder heads. Do a little research for YOUR particular model and learn what operates the fan and check it.

As mentioned, if we knew your year, we could offer more specific help.

Doc

 

Thanks all, I have lots of stuff to check...

 

The space between the radiator and A/C condenser can fill up with leaves and debris very quickly. Remove the shroud to gain access, and vacuum out the area.

jr

 

I have come to be on this site most my free time when i'm not cruizin. Thanks to all for input and idea's. Hey i enjoy this site better than the singles sites at women i will never be able to afford.
thanks again

Ronnie

 

Just my two cents...

The water pump...radiator......Heater core......They are all old and one fails..how are the others??

My pump failed...and when I replaced it..soon after the radiator split open.

It was full of crap...I never got it all out..and to this day I have sediment in my fill res.

I've flushed and flushed...there was just a lot of rust in there.

Once I got the system replaced with good new working components (all stock mind you) the car then ran too cool. I had to put a 180° thermostat into it as it was going down to 157° while on the freeway.

 

You did not indicate if the stat was replaced when the pump was.

The only thing I can add to all this information is if the stat was replaced, was it replaced with a LT1 thermostat. There is a difference because of the reverse flow cooling system.