4.2 motor failure

[boke]

Do you still have the original?

Yes , but tank has been seperated when checked - Perth Radiators reported it was 50% blocked - looked ok to me - but didn't test it myself with water

[nissannewby]

Yes , but tank has been seperated when checked - Perth Radiators reported it was 50% blocked - looked ok to me - but didn't test it myself with water

When it gets 'hot' have a feel of the bottom radiator hose.

[hutchy84]

Hey Boke just a thought i used to run the original aluminium radiator and i filled it with mud one day out the bush and i thought i cleaned it all out but i obviously didn't do a good enough job and the next time i took it out it over heated to around 3/4 and a crapped myself i pulled over and it cooled down straight away. Anyway i cracked the top tank so i had to get a new one and i was advised to stay away from the copper radiators as they don't disperse the heat properly so i put an aluminium one in which was 30% bigger than the standard radiator and i have never had a problem since. Maybe a possible solution to your problem. I just got one of those radiators on ebay for like $380 and has been in there for 2 years so far and still havent had any issues. The ebay seller was called radiator warehouse and are located in Queensland i think from memory. i hope you sort your problem out

[Scorpiovee]

Your issue could be the copper radiator. Aluminium is more efficient as a heat sink, basically, removes heat better than copper does. Bear in mint too that the temp reading 3/4 is still in the "normal" range. That said, I understand the uneasy feeling your getting.
Perhaps switching from copper to aluminium may solve your problem. I'd even look at a triple core unit if you're towing.
Good luck with it all, interested to hear how you get on.

[jet]

The original radiators are good at their job, just rest of system isnt. Heavier copper and brass units may not work as well despite their advantages. New alloy cores are pretty reasonable price. as are the plastic tanks
Definitly get a second temp gauge, all the way up to red isnt "overheating". Used to be plenty of info around on this. The standard gauge isnt linear in its reading
The new engine will be a bit tight and likely to heat up a little Id have thought.