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i and the mechanics cant seem to figure out why my nissan truck overheats after going on to the freeway in phoenix its hot here now. replaced head gasket both cats, radiator, t-stat,clutch fan ,temp. sensor, water pump, new radiator hoses etc all new. they have bleed system of air. still gets hot. i need help please . i and everybody is stumped. any help would be good. thanks a lot. 2002 nissan frontier xe truck. 2.4l dohc.
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My solution… Sell the truck to a Canadian!! JK 🙂
Does turning on the Heater lower the temperature?
Anything unusual happen to the truck before this issue started? Any work done before the issue?
FWIW I have taken apart and rebuilt engines that have had blocked coolant passages… 🙁
-Karl
yes truck was getting hot before we replaced all items even head gasket. the coolant ports was cleaned out also. im sure its sumthing simple just not seeing it. niisan dealership could not figure it out also funny huh.
well i thought a lot of people on here might have a few ideas to check out. i quess a everybody must ne stumped by my problem. lol.
Grab the bottom rad hose and squeeze it. You shouldn’t be able to crush the hose. It should have an internal stiffener, preventing the hose from collapsing during operation and blocking coolant flow.
Some “no name” after market generic hoses have been known to be missing the internal stiffeners. It could be possible that the original hose stiffener failed, causing the original overheat condition, and the replacement part is causing it too.
we have checked all the hoses they are fine. plus they are new also. still no luck and still overheats have replaced everything on truck form head gasket cats etc. t-stat . temp sensor fan clutch water pump and radiator. this truck is strange. I still need sum help please. thanks frious.
OK, first question is WHY were each of those items replaced? What stuff did you find already that lead you to changing all those parts and replacing the head gaskets? The symptoms or diagnostic results from the tests that led to those choices may hold the clue to somebody here seeing a suggestion.
So what has been done to clean the block and coolant passages? Anything?
Have you tried a good cooling system flush and/or pouring some CLR into the block?
Really the only thing that is left is some kind of coolant flow issue so look for that.
Does it overheat only while driving or under load or will it get hot just sitting there idling?
Have you confirmed the thermostat is opening? How?
Have you checked inlet vs. outlet temp in the radiator?
first of all im not a mechanic im a parts changer. so i tried to use some common sense and started changing parts to solve the problem one by one. well that did not work. so i put it in the shop and they said head gasket needed to be changed . they did that and and cleaned water jackets etc. after that it still got hot after getting off the freeway after about 8 miles. so then we changed out the upper cat cause it was plugged also. but it still gets hot after getting on the freeway. everything has been changed on this truck and flushed and cleaned. i think its air flow issue or water flow issue. like i said im not a mechanic. but all the mechanics i have taken it too keep hitting and missing at my expense lol. truck seems to do ok as long as you dont get on freeway. i hope i have met your questions. thanks for your help.
Just a silly question, are you verifying the coolant temperature with live data or just the temp gauge?
I had a 93 Nissan where te4h gauge was intermittent.Maybe some other ideas at this thread: http://www.clubfrontier.org/forums/f19/2000-frontier-2-4-overheating-issues-58703/
[quote=”frious” post=144062]first of all im not a mechanic im a parts changer. so i tried to use some common sense and started changing parts to solve the problem one by one. well that did not work. so i put it in the shop and they said head gasket needed to be changed . they did that and and cleaned water jackets etc. after that it still got hot after getting off the freeway after about 8 miles. so then we changed out the upper cat cause it was plugged also. but it still gets hot after getting on the freeway. everything has been changed on this truck and flushed and cleaned. i think its air flow issue or water flow issue. like i said im not a mechanic. but all the mechanics i have taken it too keep hitting and missing at my expense lol. truck seems to do ok as long as you dont get on freeway. i hope i have met your questions. thanks for your help.[/quote]
So basically you wasted a lot of money guessing at stuff and then somebody replaced the head gaskets?
WHY did they replace the head gaskets?
Sounds like they never got the system bleed properly but it’s hard to try to diagnose something when you don’t have any info for us
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