we have put another motor in this about 2 yrs ago,new radiator,head,water pump,fan etc and now it is starting to over heat under load. going down hill it cools fast but as soon as it hits a hill again the temp starts to climb. any ideas have checked viscous all ok. we want to get rid of it but want it fixed first. we have had it about 6 yrs and has always had a heating prob. we have fixed everything poss and now starting to play up again its a 96 2.7 turbo diesal.
rocky0169,
Mar 25, 4:31am
Radiator core blocked! whats the coolant flow like! have you checked the thermostat! if not take it out put thermostat in pot of cold water slowly let the water heatto boil dont bloi first other wise you shock the thermostat. possibly blocked water gallery in the block it self! restricting flow! or low on power!
rocky0169,
Mar 25, 4:32am
Was the head new replacement or recoed!
mudguts2,
Mar 25, 4:33am
still runs well and just started this on fri. Has heaps of power. radiator is brand new.so shouldnt be blocked.
snoopy221,
Mar 25, 4:33am
2year old radiator and new zealand water. would be my first guess-radiator blocking-needind tank removal and *rodding out*
auto! seperate trans coller helps em. (and the fans viscous aren't that crash hot-I.E. somewhere about the top of that hill it cools down quick on the downhill you'll hear the fan humm.not before the gauge moves)
mudguts2,
Mar 25, 4:33am
we had headthe head all done up over in kawerau.
mudguts2,
Mar 25, 4:34am
yes automatic. we live rural so using just the fresh water we get from here. no added chemicals.
snoopy221,
Mar 25, 4:35am
Fulla ya know in roto wrecks 4x4's still don't E.
mudguts2,
Mar 25, 4:37am
yes and just about ready to take it to him to wreck.
snoopy221,
Mar 25, 4:37am
Yeah and a LOT of later model vehicles with later model radiators-4x4's ESPESCIALY. are blocking cores and NEED rodding REGULARILY.
snoopy221,
Mar 25, 4:38am
Meh go find a radiator place and get em to flow test that rad.
mudguts2,
Mar 25, 4:41am
will check thermostat first. real frustrating. I didnt really want to get rid of it but got to think of economics these days and diesals are to dear to run and keep on the road.
mudguts2,
Mar 25, 4:42am
i am to scared to take it to far in case it heats up to far. haha.might not make it to town. radiator hasnt long cost us over $300 surely it wouldnt block that soon would it.
snoopy221,
Mar 25, 4:45am
Meantime fang that heater on screen and hotand full speedfan when ya goin up hills. After all from what ya spent on it-yeah they are expensive beasties-but handy in winter mud. And ya do know someone in the area-who-wel I trust him.LOL
mudguts2,
Mar 25, 4:48am
ok thanks. we have a nissan ute as well so will just keep the 1 diesal. its the 1 in view road that you know isnt it. been around town for years and a nice fella.
snoopy221,
Mar 25, 4:49am
Probably 5 or 6 posters here may come back in and comment. Seems some of the maintainence IS rodding them regularily-never used to have to-but late model metallurgy and well. A lot of rodeos and couriers have lunched motors due to blocked radiator tubes. New Zealand water and later model metallurgy. IMHO. [Hence Be AWARE.K]
snoopy221,
Mar 25, 4:50am
Yip,,,,Nev.
mudguts2,
Mar 25, 4:51am
thats the 1 i think i spoke to you on here once before.
thanks for that. if we cant sort it will call in and see nev at the yard.
snoopy221,
Mar 25, 4:53am
Yip. been a while.LOL
next-to-normal,
Mar 31, 2:19am
try antifreeze as it raises the boiling point, im a fan of motorup in the engine oil too
elect70,
Mar 31, 2:26am
New thermostat , the fact it cools down going down means the radis ok, fan,wellhardly need it on the move , I ran a car for year with only a manualy switched electric fan , only needed it in town .To test trhemotake it out & put in boiling water, it should open fullyif not get new 1
gadgit3,
Mar 31, 2:53am
I begg to differ. A 50% blocked radiator will preform well under normal conditions but once the load comes on ie a decent hill the lack of flow can't keep the temp down. And you get exactly what this nissan is doing. Also the fan dose serve a purpose on the move under the same loaded condition and viscous fans and blocked radiators are the biggest cause of cracked heads in these jap diesels.
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