Jeep still over heating even after head job

jeepwrnglr92 · 10-01-2007, 10:13 AM

OK this is getting old really quick

I changed the water pump, tstat fan belts, had the head done and the radiator flushed and tested.

What else could it be. THe stupid thing is still over heating.

New shroud and new fan/clutch Sorry left that out
EDITED TO INCLUDE MORE INFO:

Hi All,

I decided to clean this post up and be a little clearer on what has been done to the heap to this point.

Truck seemed to be running fin when I first bought it. But it was cooler in Jan.

I did the basics:
Plugs
Wirers
Oil/filter
Air filter
{Shock,Brakes,Tirers/rims} Yes no affect on cooling I know, just part of the list
Flushed the coolant (block and radiator ) with Prestone kit.
Hoses checked ok
Changed out tstat
Clutch fan
Flushed and pressure tested radiator
No coolant in oil
New water pump
Another new tstat
New belt
Pulled the fuel tank and replace bad hose to fuel pump
New radiator cap (x2)
Pulled head and had it rebuild and resurfaced Put in new seals, gaskets etc.
new fan shroud
Some of this I did some the mechanic did so I am going to check his work when it gets home.

isuace · 10-01-2007, 10:18 AM

Is the fan clutch working properly? Is the fan shroud intact and installed?

**KUK9** · 10-01-2007, 10:22 AM

Always start with the easy stuff before you start throwing money at a problem. As isuace said, check the clutch fan and the shroud. Is your coolant level right, and is the mixture correct? Do you have a winch or lights on the front end that is blocking airflow to the radiator? Is the front of your radiator caked with mud or anything that is preventing it from working? Do you have coolant in the oil? Double check your thermostat and make sure you didn't get a bad one.

jeepwrnglr92 · 10-01-2007, 10:41 AM

no winch or mud. have not even been off road with it yet.

Been in the shop all summer.
Stock setup.

Yup I did replace all the simple stuff first. tested the coolant and had exhaust gases in the coolant. so we did the head still not working.

tried 2 tstats etc.

MetZenDS · 10-01-2007, 11:34 AM

check the exhaust system. Clogged cat can cause hot gas to back up... clogged muff the same.

**ionakana** · 10-01-2007, 11:38 AM

a friend put his belt on wrong and was spining the water pump in the wrong direction causing his to over heat. Is you serp belt on right?

**Varnish** · 10-01-2007, 11:51 AM

Maybe describing when it overheats will give folks ideas. Does it just go straight to red sitting still, just on the highway, etc? Does it redline or just run hotter than it should?

jeepwrnglr92 · 10-01-2007, 12:25 PM

I am hoping the mechanic put the belt on right. It was on right when I gave it to him

as for what is happening I had another threat on this a while back but here goes.

At idle the truck temp goes up to 240+. It does not take long for it to get there. When I start driving it "use" to go down in temp but who knows at this point what it is doing.

jarhead2531 · 10-01-2007, 01:38 PM

Just a thought, have you considered hoses? A friend of mine reused some radiator hoses on a s10 after replacing everything else and whenever the engine would reach a certain temperature, the walls of the hose were so weak they'd collapse on themselves and starve the engine. It took him weaks to figure it out.

jeepwrnglr92 · 10-01-2007, 02:55 PM

Quote:

Originally Posted by jarhead2531

Just a thought, have you considered hoses? A friend of mine reused some radiator hoses on a s10 after replacing everything else and whenever the engine would reach a certain temperature, the walls of the hose were so weak they'd collapse on themselves and starve the engine. It took him weaks to figure it out.

I did check the hoses when it was up to temp and they seemd ok. but at this rat I may try replacing them,

TSEJEEPERS · 10-01-2007, 04:35 PM

Did you check your temp sensor to see if it is good and really reaching these temps?

jeepwrnglr92 · 10-01-2007, 04:42 PM

Quote:

Originally Posted by TSEJEEPERS

Did you check your temp sensor to see if it is good and really reaching these temps?

The mechanic said he used a IR thermometer gage and it was reading high. I thought the same thing and I may replace it once it gets home just to be safe I think its only 16$ or something like that.

I bought an IR thermometer too and Ill check it with that too.

cyco · 10-01-2007, 05:08 PM

if its not the right head gasket, could be covering water ports, sometimes you can turn the gasket the wrong way, works fine but covers water ports

**hdfxrs91** · 10-01-2007, 11:22 PM

I believe that there are some engines where the water pump turns in one direction and other engines it turns in another direction. When purchasing a new water pump, you have to make sure that the vanes are facing the same direction as the original.
One way to make sure that coolant is moving through the system is to remove the t-stat and watch the water through the rad cap to see if it is moving in the right direction.
Also make sure you have the proper temp t-stat (195).

jeepwrnglr92 · 10-02-2007, 08:49 AM

Quote:

Originally Posted by MetZenDS

check the exhaust system. Clogged cat can cause hot gas to back up... clogged muff the same.

I am not running a cat just a muffler and it seems to be flowing OK.

Not sure how you check that except that there is good flow out the back.