heads up

[Justbrad]

I have had many Surfs in with either heads gone or seize bottom ends due to bad servicing.

I came to the conclusion a long time ago that 80% of the trucks with head problems had lights fitted to the front of them.

Coincedence?

Well I will leave that up to you to make your own minds up.....

Lets just say I never fit lights to my trucks and have never had head problems.................. oh cr@p I bet I've just spoken too soon

Flushing the system will help as the water ways fill up with rust and gets slowly blocked, I'm sure the tech guys on here can vouch for that, how many times has the head been taken off and rust seen blocking part of the waterway.

Thats my thoughts anyway

[Apache]

Does anyone do a progressive setup for an electric fan where it comes on slowly at say 92 degrees, goes medium speed at 96 degrees, and full chat at 99 degrees (just guessing the temps) ? That would be a good solution.

I've seen that on big fixed power generator diesels. The fan speed seemed to be continuously variable, not stepped. I expect they use PWM motors and vary the drive pulse width in proportion to temperature. I dont know why they did it like that because it seemed overcomplicated and electrically noisy. Maybe 'because they could'?

[puddlesurfer]

Flushing the system will help as the water ways fill up with rust and gets slowly blocked, I'm sure the tech guys on here can vouch for that, how many times has the head been taken off and rust seen blocking part of the waterway.

Thats my thoughts anyway

I've just had a new boiler installed by british gas, the engineer installed a magnetic sludge trap, that works something like this:

http://www.cheapcentralheating.co.uk...-plumbing.html

Possibly a good mod for Surfs?

[TonyN]

Its just a properly working viscous fan, if its set up propely, you shouldn't get any noticable change in engine temps. Which is the argument against basic electric fans, you have a fixed on and off temp, put the to points close together and the fan will be switching on and off all the time, being noisy and sucking engine power, make them further apart and the engine temps cycle up and down unhealthily.

I've seen that on big fixed power generator diesels. The fan speed seemed to be continuously variable, not stepped. I expect they use PWM motors and vary the drive pulse width in proportion to temperature. I dont know why they did it like that because it seemed overcomplicated and electrically noisy. Maybe 'because they could'?

[Predictable Bob]

A few years ago when we first started having overheating problems I made enquiries with Kenlowe and they were quite adamant that their fans weren't powerful enough to replace the OEM Surf fan and should only be used as additional cooling ...

[TonyN]

I've just had a new boiler installed by british gas, the engineer installed a magnetic sludge trap, that works something like this:

http://www.cheapcentralheating.co.uk...-plumbing.html

Possibly a good mod for Surfs?

You shouldn't need it on a properly looked after Surf, it goes back to the orginal subject, you don't get sludge on a well looked after engine. Badly mixed coolants or head gasket/head issues cause crap in the cooling system.

Any truck with crunchy hoses has/has had head issues, the exhaust gasses cause corrosion of metal parts of the cooling system.It might be useful on these, as you'll struggle to clean it out, but remember your coolant has different chemicals and occasional higher temps than a heating system, so not sure how it'd last long term.

A blocked rad is virtually impossible to clean, as there are so many alternative paths for the water to flow, so you never get any pressure to shift stubbon crap in core.

[JUDWAK]

I've just had a new boiler installed by british gas, the engineer installed a magnetic sludge trap, that works something like this:

http://www.cheapcentralheating.co.uk...-plumbing.html

Possibly a good mod for Surfs?

it would work
but
the amount of magnetiic feild to hold rust back in a surf would be quite high
the water will be running at such a speed you will need a very powerfull magnet
ECU would pack in first with a magnetic feild like that under the bonnet

[puddlesurfer]

It was just an idea, the one on my boiler system is made of brass so would withstand hotter temps.

[JUDWAK]

It was just an idea, the one on my boiler system is made of brass so would withstand hotter temps.

its quite a good one to be honest
it would have to be too powerfull of a magnet
(magnets are my thing)

[Apache]

Its just a properly working viscous fan, if its set up propely, you shouldn't get any noticable change in engine temps. Which is the argument against basic electric fans, you have a fixed on and off temp, put the to points close together and the fan will be switching on and off all the time, being noisy and sucking engine power, make them further apart and the engine temps cycle up and down unhealthily.

That'll be why they've come up with these continuously variable fans then! Nice idea, poor execution in that case though. They failed EMC testing because of those fan drivers!

[Apache]

ECU would pack in first with a magnetic feild like that under the bonnet

No it wouldn't.

[gwh200]

No it wouldn't.

Go get him tiger.

[TonyN]

here we go again!!

Judwak is in da house, take cover.....

[Predictable Bob]

George, have you switched your magnet on ? My Surf's moved about three inches north in the last hour !

[puddlesurfer]

I think this is what british gas installed:

http://www.britishgas.co.uk/products...em-filter.html