Series 2a cooling

[dullbird]

Now it is my understanding (only from reading not from experience) that the cooling systems on the series2's are some what inadequate when put to task...

This got me thinking.

I have bought a new radiator for our rebuild from the UK and was unable to get the 4core heavy duty radiator sent as they were out of stock and would be for some time. So I settled for the original 3 core.

I was wondering about fitting a kenlowe fan..but was wondering whether it could be used as well as the belt driven fan??? like an extra measure. I'm not considering buying a brand new one that can be set up to come on at certain temps although that would be nice was thiking more buying a second hand one and just rigging it up to a switch and flicking on the fan when dragging heavy loads on hot days..


Thoughts????
A stupid idea or one that should consider pursuing.:)

Thanks

[isuzutoo-eh]

My understanding is its predominately the holden conversions, that run hot..?

There's a thread in the Series Three section on pusher fans.

[Gromit68]

I've never had cooling issues with any of my series trucks - my diesel Gromit barely ever gets hot; even in these Sydney temps - it sits in the middle of the N on even the warmest of days, even when toiling up the Kurrajong slopes.

I think a nice clean, well maintained radiator should be more than adequate with the existing belt driven fan.

Maybe you'll only need the Kenlowe if you're going to cross the Sahara?

[d@rk51d3]

Pick up the optional 8 blade fan, as fitted to the military landies. Should move plenty of air.

[dullbird]

Grommit can I ask though have you hauled heavy loads in the heat?

this little car when built will likely be doing wood runs from the state forest and jobs such as this..the car will not be used much but when it is it will be doing the heavy load hauling..

so i guess I also want the thoughts from people that use their cars not just drive around in them on hots days...

I'm taking into consideration that we are currently hitting the 40's in Sydney and are often in the high 30's in the summer

[isuzurover]

The standard cooling system is fine for a 2.25.

I previously had a 2.25P and now have a 2.25D - both tweaked slightly. Both of these engines ran the same 3-core aftermarket rad (a 5-core replacement of the OEM one was to $$$ back when I was a poor student). I also run the original military 8-blade fan. I have never had a shroud fitted. I have never had an issue with cooling.

I have hauled 1.5T of wood from down near Landy Andy's place to Perth - about 150 km - though mainly in winter.
I also drove Brisbane-Perth in summer while fairly heavily loaded.

Not to mention plenty of difficult 4x4ing - not much airflow when moving slowly.

[dullbird]

Thanks Ben

if that's the case I wont bother

I guess i can always fit one at a later date if we find its not coping

[isuzurover]

Thanks Ben

if that's the case I wont bother

I guess i can always fit one at a later date if we find its not coping

Thinking back, I did lose a small amount of water from the rad once when playing silly buggers on a salt lake in 2WD, but that is the only time, and obviously only because the engine was working quite hard and the car was essentially stationary. I haven't had any problems in soft beach sand in summer.

[JDNSW]

I have operated both petrol and diesel 2.25s in the Simpson Desert in summer without overheating, and have never had an overheating problem on any 2.25 unless there was a defect. My current 2.25 I had no problems with it hauling a trailer with a tonne and a half of rock this January (mid thirties!). And I have removed the military fan to try and get some small improvement in economy! Note that I have always retained the shroud, and have always fitted cylinder head temperature gauges to my 2as.

John

[Gromit68]

I used to haul wood from Thirlmere to Campbelltown with my SWB and it was fine DB. :)

[Aaron IIA]

It is important to have a proper thermostat - one that has a skirt that descends and blocks the bypass passage when the main passage to the radiator opens. Many aftermarket thermostats do not have the skirt, and hence always leave the radiator bypass open. If you then experience overheating issues when working hard at low speeds (<40km/h or so) then fit a shroud before fitting an electric fan. A large amount of fan efficiency is lost by not having a shroud. That said, while not having a shroud fitted, I have towed a SIIa LWB (with chequer plate ute tray) on a car trailer up a long hill that necessitated 1st gear low range. It got warm, but did not boil. Remember, you have either a 10psi (square tank) or 9psi (round tank) system, so can go a fair bit above 212degF.

Aaron.

[Blknight.aus]

its fine, just make sure the shroud is correctly fitted and its looked after, if you have everything in good order the only time they over heat is in 45 degrees fully loaded pulling 2t of trailer at low speed. and overheating is relative. The 2.25 takes a lot more overheating than any other engine you can think of. With good oil and the 6 pot oil cooler bolted up to them you can run them as aircooled if you need to. (dont ask why I know that)

[UncleHo]

G'day Dullbird :)

With my 2a 2.25 Pet I have the square tank 10lb system,with an 8 bladed military fan,I would suggest that a shroud is a nessesity,I have used this vehicle loaded in summer and towed a loaded No 5 trailer without it overheating, but as said the correct type and temp thermostat (82*) and with clean fins there should be no problems providing the timing is set right 6*BTDC on 91 octaine then you are laughing.


cheers

[Johnno1969]

My 2.25D with a standard radiator hardly ever breaks a sweat. But on stinking hot days (40 degrees plus) it does warm up a bit. Mind you, it's never overheated. It warms to about 78 degrees and stays there on long runs (often never even gets that hot). Up into the nineties on the stinkers. Standard four-blade fan. I have a large electric pusher in front of the radiator if ever I want it at the flick of a switch.

The vehicle's in a million bits at the moment. When she's all back together, I am planning to install a heater fan from a Discovery down near the exhaust manifold to draw hot air out through the left wing. It blows a gale, and may be useful if I ever do cross the Sahara.

Cheers,

John