Hilux 2.8 TD overheating What else to check ?

Luke, You have to find out when its overheating.
Is it overheating during free way conditions? If so it is a water flow problem.
Is it overheating during traffic conditions? If so its an air flow problem.
If the fuel pump is overfueling, this could cause over heating as well as your EGT's will be too high.
Hope this helps
120scruiser

Hi there Luke, I have a 2.8 non turbo hilux, first thing I would be checking is the thermostat, Pull out throw a genuine one back in it $20, next would be the viscous coupling, this should be quit loud at first start in the morning then with bonnet up so you can hear it it should fade out after about 20 seconds, also when up to operating temp and sitting in traffic for a while put in neutral and give rev around the 2g mark should hear fan roaring once again will probably need the bonnet up so you can hear it over the rattle of the 2.8D. Has he only just purchased the vehicle or has he had it a while and has become an issue. If he has just bought it, it could also be an issue that the previous owner has tweaked the fuel pump a bit to get some more power but has caused it to overfuel and run hot. If all other basis are covered i would be booking it into a diesel injection place and getting the pump timing checked and fuel pump and also the turbo to make sure they havnt wound the boost up as well trying to get some more power. This is one of the reasons I never had myn done as some blokes on here who have been there done that have said overheating was an issue but in saying that every turbo mob I rang said overheating would not be an issue even with standard radiator.BUT I take the advice from people who have either had or have the same vehicle with these issues and listened to them not some one who is about to take 3 and 1/2 k from me. Hope this helps in some way, maybe other people on here will also have some more helpful hints which I'm sure they will. Regards Steve M

You say he bought it with 80k on it but is now up to 120k has he had the timing belt done, if so who did it and did they line all the timing marks up properly eg fuel pump, if not timing could be out with the pump possibly causing it to over fuel if he hasnt had it done then I wold advise him to get it done asap by some one qualified cause if he doesnt know what he's doing will/possibly stuff the motor eg pistons coming up valves coming down cruch stuff the head or punch a piston out the side of the block big $$$$ and also if that belt snaps or jumps a tooth. I worked for toyota for 5 years. Regards Steve M

I had the 2.8 with the DTS turbo and I put 3 x 30ml vials of fluid in the fan viscous hub after dimantling and cleaning replaced the radiator with an aussie desert cooler triple bypass and the sucker never moved even on the hottest of days. With the extra cylinder pressure check and retension the head in case the cooling system is pressurising and pumping water out into the overflow as if this is the case it wont get sucked back in and this can occur without showing any signs of any other leakage such as water to oil. if got early enough it will seal and does not necessarily requir gasket replacement.

These are just other possibilities as I am sure there are plenty of others. One opinion only for what its worth.

Luke,
Has he by any chance just fitted a large set of spotties on the front limiting air flow.
Someone I know did this on his Nissan and now it heats up all the time

Regards

Hi Luke,
had the same prob with mine took it to Toyo etc cut a long story, Nu Look radiators suused it out instantly, the clearance on the bottom tank is only millimeters he extended the bottom tank and gave it 25 mm clearance and solved prob, cost was $100, hope this helps,
Dave