Why does my 99 jeep cherokee keep overheating?
#1 cause of overheating/slow temp creep on the 4.0 is simply worn out fan clutch. no new water pump (probably should) running on water at the moment. Often overlooked when changing the lower hose is making sure there is a spring inside it.
What should I do if my XJ cooling system overheats?
However, proper maintenance can prevent issues and extend system life greatly. If you do no other maintenance on your XJ at least maintain the cooling system – it’s a very delicate design so take care of it! I know this sounds like dribble and you’ve heard it a thousand times before but I can’t emphasize how critical it is.
How can I tell if my Jeep is overheating?
The first thing would be to keep the cooling system in proper shape. 1. Check the coolant level – Is it in the correct range? if it is not, add coolant and find out why it is missing. 2. Verify that the coolant is clean with no oil/dirt/rust in it. ** 3.
Can a 4.0L XJ run without a thermostat?
Maintain at least a minimum of 44% ethylene glycol and don’t EVER run straight water (except in emergencies). Do not run without a thermostat or the engine will begin to form sludge from condensation in the crankcase which will cause long term engine damage (condensation is water and not the best thing for lubricating bearings).
What should the coolant concentration be on a XJ?
If not, then you are losing coolant (or it wasn’t serviced properly to begin with). Check the coolant condition – it should be a 50/50 mix of alloy-friendly ethylene glycol/distilled water (DO NOT USE POLYPROYLENE GLYCOL) and the concentration should read at least +128*C to -20*C using a coolant tester.
How can I tell if my XJ engine is overheating?
Check the system visually for signs of leaks using a pressure tester while the engine is hot and use a bright torch so you can see any smaller seeps. You are looking for the obvious wet stuff but also look closely for past or intermittent leaks as evidenced by white or green crusty flaking, build up and dry runs.
What should you do if your Jeep overheats?
If your Jeep overheats, you should diagnose and find the reason as soon as possible, replacing/rebuilding the engine is an expensive fix and it woulds be better to avoid it. How to avoid overheating? The first thing would be to keep the cooling system in proper shape. 1.
Maintain at least a minimum of 44% ethylene glycol and don’t EVER run straight water (except in emergencies). Do not run without a thermostat or the engine will begin to form sludge from condensation in the crankcase which will cause long term engine damage (condensation is water and not the best thing for lubricating bearings).
If not, then you are losing coolant (or it wasn’t serviced properly to begin with). Check the coolant condition – it should be a 50/50 mix of alloy-friendly ethylene glycol/distilled water (DO NOT USE POLYPROYLENE GLYCOL) and the concentration should read at least +128*C to -20*C using a coolant tester.