'Mug......you,
slug you'
just kidding DL. Tank is great.
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Thanks Ron and the others, the engine has made it through all right, it was a worry, previous to fitting a MLS type head gasket it only took one boil up to blow the gasket.
I think I need to wind the fuel back down a touch, driving up Snowball (I can't believe that this road is so long without a level or downhill section) watching the EGT gauge and the temp gauge, driving in 3rd. gear EGT temp was around 520 to 550, change into OD. and the EGT would jump 50 and more degrees instantly, change back into 3rd. and almost instantly back down 50 degrees. Trouble was not enough road speed to keep the air flow up enough to help cool, so whenever the needle hit "H" I would pull over and let the engine cool a bit and the Ambient temp. was still pretty warm.
The old disco felt like a sports car once we had dropped the Van at Cooma, have to give it a treat, like a new trans filter and oil change, it certainly earned it.
Also learnt that just very lightly applying throttle and keeping it under or at 1000rpm is the ideal (for my Disco anyway) to pull a load off the mark uphill, only got wheel spin if I let the revs go over, suprising how much grunt down low, I have 4.11 diff gears, so that helps.
That was our second recovery in this area, had a few calls from distances far enough away to make it not viable like up North of Sydney, much safer to stick to areas that we know, we also have a 20" tray truck that we can load the disco on and get as close to the recovery (for vehicles that have broken something and can't be driven) as possible.
So I hope our Triton and Jayco owner, his Missus and kids enjoy the rest of their holidays, so if you are contemplating taking a Van the size of a Jayco off road, check with the local NPWS office or State Forests, don't rely on some dick who thinks he'll have some fun at your expense, thanks to all the replies, Stay safe, Regards Frank.
For some reason, I left a section out of this quote from above post and as the "Edit" bit was gone I will explain in this post.
Quote: "Trouble was not enough road speed to keep the air flow up enough to help cool, so whenever the needle hit "H" I would pull over and let the engine cool a bit and the Ambient temp. was still pretty warm."
What I needed to add was that the major cause of the heat was the fact that I was allowing the engine to "Labour" with too much throttle, even when labouring the temp. would drop just by backing off a touch on the throttle.
The solution was to drop back a gear and adjust the throttle so that the engine was in it's sweet spot and not over revving or labouring.
Trouble with this was that as I said above in prev. post ambient temp was up around 20 degrees and the vehicle wasn't moving fAst enough to take advantage of the airflow, hope that explains it a bit better, Regards Frank.
The situation you describe Frank, re: road speed and airflow, becomes totally irrelevant with thermofans.
cheers, DL
I reckon theres more at play here than the faux requirement of thermo fans...
somethings wrong with his cooling system, his driver technique or his engine is having breathing/bad fuelling issues.
all the clues are in his post...
Dave did find that the air filter had partially collapsed, so wouldn't have helped, also the boost compensator needs tuning back down a touch, also Dave the fact that the road that i boiled up on was a constant climb for many kilometres (over 20+) with out a level or downhill section and the van weighed well over 2 tonnes and was like towing a parachute, even when I got to a downhill section, also after the first boil up on DMFT I was using straight water to top up the radiator and engine, no coolant left after first incident, the Disco was working hard, if there was a problem with the cooling system it would never had made it to Cooma.
Ian I don't have a muffler, straight thru with a 3" resonator on the very end (not blocked), Regards Frank.