evans radiator coolant

A diesel running rich?? New one on me. What do you do to cure a diesel running rich, install bigger jets?? [;-)

Rich, as in too much fuel there for the available air to burn it properly. Happens in petrol and also in diesels if injection is too much for that said air. Either could be termed, over fuelled.

That is pretty clear what is meant, unlike some the gobbledygook of some posts in some threads.

Ron N, its most likely a mechanical injection normally aspirated hilux/4Runner engine...and some blokes fit turbos to them..similar to fitting one to a 1HZ Landcruiser engine.

The turbo does force in at above atmospheric pressure..air..and to compensate for the extra air/oxygen at a 21% mix, you physically adjust the fuel pump.

In a diesel, extra fuel = combustion heat.

It can be a problem in factory designed normally aspirated engines, they don't breath (multi-valve) or have the cooling system design to disipate the extra combustion heat when under load.

Invariably they end up with heat related issues, more so when used for towing and hard use where the engine EGT (exhaust gas temperature) is not measured or appreciated..and end up with symtoms of overheating, and resulting cracking of pistons, combustion chambers and cylinder heads.

So the claim of overfuelling...a potential rich air/fuel mix is valid in this situation. :0)

Pressure raises the boiling point of water.

Yes Shaker, so does ethylene glycol and similar compounds used in proprietary coolants.

50/50 coolant mix increases boiling point by around 6 degrees, 14psi increases it a further 25 degrees (approx)
I chased my tail for years trying to correct a Nissan's inherent overheating problem.
Funnily enough plain water cools better than a coolant mix.

14psi increase elevates the boiling point of water by 19c actually.

But you are right about plain water cooling efficacy. A 50% mix of glycol and water has only about 75% thermal capacity of pure water.

Unless you are in freezing ambients, simply using water with an inhibitor is generally adequate.

lewjack replies ,thanks everyone for the comments I thought it was too good to be true, it looks like I might go by the way of an oil cooler,with respect to egt I have installed a pyrometer and drive accordingly evey turbo should have one ,thanks again lewjack

Lewjack, that's good to hear that you have a pyrometer and drive accordingly. Oil cools as well as lubricates, so if you increase your oil capacity, you're increasing your engine cooling as well.

Most manufacturers use the minimum amount of oil that will do the job. If they increase the oil capacity by even half a litre, that's an extra couple of dollars of build cost per vehicle - and over a years production, that adds up to a lot of $$$'s that comes off the companys bottom line.

Bean counters spent all day and half the night, scheming up how they can shave $5 off the build cost of every vehicle, and they continually revise the cost of every single item that goes into building a vehicle.

Cheers, Ron.

Echucan Bob - When you're looking for a thread on this forum, use Google, rather than the forum search engine.

Google will find 10 times more, 10 times faster, as compared to any forum search engine.

Half the time, the forum search engine won't even produce a result for what you're searching for - when Google will find it instantly.

If you're looking for "coolant" on here, just type "Exploroz coolant", and you'll get a number of Exploroz thread hits, plus a choice of more results.

Cheers, Ron.

Thanks Ron
That's a darn good tip about using Google and do your search with exploroz as a prefix......works a charm, super fast, have tried a few times now and works a treat ....rather than using the forums search
Cheers John. /Albany Nomads