6.5 chev n/a

Hi 4wdcy,
This makes interesting reading.

http://www.4wdmonthly.com.au/forum/showthread.php?t=23850

Scooby

I have a Patrol with 6.5 Chev N/a motor.

The summer before last (2007/8) I was experiencing some temps of up to about 115 degrees C (sender unit is mounted at the very back of the passenger's side cylinder bank head, which is arguably the hottest part of the motor).

Before the next summer (2008/9) I fitted a Toyota viscous fan hub and fan. This was done at the suggestion of the blokes at Brunswick Diesel. The viscous hub is about twice the size of the Patrol unit that it replaced.

About the same time, I re-fitted the Amsoil dual bypass oil filtration set-up and added an extra (quite small) oil cooler. The Amsoil filtration system consists of 2 filters which I've mounted behind the bullbar where the winch used to be. I rarely used the winch anyway, so it was sold off.

One of the filters is a "BE110" which holds 2 litres of oil. Also, there is probably another 200 to 300ml of oil in the pipelines and additional cooler. So my total oil capacity is now about 10.5 litres.

During summer 2008/9, I rarely ever saw the coolant temp gauge go above 90C.

At this time of year, it rarely reaches 75C.

I have fitted a VDO oil temp gauge onto a convenient bung on the Amsoil unit, and this rarely ever moves off the 50C minimum / starting point. I'm not sure if this is due to a faulty gauge/sender or whether the oil is really running at such a low temp, given that it is being measured at a point which is so far away from the sump. Even after a decent drive I can still put my hand on the filters without burning myself, so I'm thinking the gauge is probably showing true.

Of course, now that I have done 2 different "things" at the same time, I cannot really tell whether it was the Toyota viscous hub/fan or the extra oil capacity (or a combination of both), that has seen my temps drop so radically.

Either way, I'm now VERY satisfied that any cooling issues I once had, have gone for good (touch wood). In fact I'm concerned that I may actually be running too damned cool....not good for the oil or the fuel consumption. Latter runs at around 17L/100, but I have a lot of weight and tow a camper trailer most of the time.

Roachie

Neighbour has a 6.5 in his 80 series and has no troubles at all with overheating.

I have a 6.5 in my HJ 75 Troopy and have no problems at all, I tow a 17foot 6 van and it never gets hot. The 75 has a lot smaller radiator than the 80.

Having said that. Like Roachie I have a genuine Tojo viscous hub and a genuine late model Ali radiator. The one out of a turbo 78 series. Also I run a product called cooldown in the coolant.

My murphy temp gauge is in the back of the head and it is very accurate. It does not have the dampening of a factory gauge. Again 90c is the highest it ever gets, then the fan cuts in and brings it straight back to 80c.

Have you considered swapping the original engine (1Hz i presume) with a 1HD-FT 24 valve direct injected factory turbo 80 series engine?

4wdcy
Why just the Chevy option??????

For similar $$$$$ you could fit a 1HD-FTE tojo eng and have more power than the 6.5 (non Turbo) and no overheating problems as the engine uses a similar radiator to the 80.

I picked up a 1HD-FTE with 5spd auto tranny, computer, in fact everything to do the job, with 25000km on the clock, from a wreckers for $11500 for the lot.

Project TONI

Maybe worth concidering!!!

Cheers Colin.

Thanks guys for all your responses, have considered the other two mentioned but my concern would be that the 1hdtf ones are now getting on and the 1hdtfe is all the electronics. Has anyone worked out all the crap associated with the 1hdtfe install into an 80 (re computers Dash lights etc).