Bank Holiday Monday

[Rubce]

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Lytham Stag wrote:

Replanning the weekend after this happend on Saturday evening:

Oh no! :shock:What happened?

Bruce

[Lytham Stag]

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Throttle jammed open (but it's working fine now :?), engine revved it's nuts off so I turned off the ignition and pulled over. Somehow the fan blades have hit into the radiator causing it to lose most of it'swater. Any idea why that would happen?

Fan/PAS belt has also come off. Engine runs and seems OK. I need to either repair or replace the rad.

[stustag]

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Sounds a strange that the fan hit the rad! :shock:Was the throotle cable new or old or was it the linkage that got stuck?I can't understand why the engine would move forwards enough to make the fan hit the rad or why the PAS belt came off!

The only thing I can think of is the rubber inside the crank pulley is worn and the whole assembly went forwards?:?(just a thought)

You can get the rad re-cored and whilst out get a temp sensor fitted if you have an electric fan

[DJT]

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Wow! Bet that woke you up :shock:. Check the throttle cable end at the carb. I have had similar due to this being too long and getting caught up in the linkage. Maximum 1" past the securing nipple, and it helps to seal it with heat shrink cable insulation to stop it fraying.

Dave

[Bob Heritage]

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Make sure that the end of the cable where it passes through the nipple is left straight, it happened to me a few years ago where the cable got caught up after kickdown with a roundabout approaching:shock::shock::shock:. The fan hitting the rad is more likely a shock to the viscous coupling who gave up the ghost.

Bob

[Stagdad]

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Iv'e seenat least 1 fan that was alot thinner (blades)than mine and was quite flexable ,i dare say if you had that typethey could bend forward given enough revs and hit the rad.

Steve

[Bob Heritage]

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Stagdad wrote:

Iv'e seenat least 1 fan that was alot thinner (blades)than mine and was quite flexable ,i dare say if you had that typethey could bend forward given enough revs and hit the rad.

Steve

I know of some owners that have locked up the viscouse permanently, I beleive that they are only effective up to 3000revs normally and the result is just what Steve has said- they bend forwards

Bob

[Lytham Stag]

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Cable looks OK -newish with none of the problems mentioned. Linkage looks OK too, so I'm really unsure why this happend. I'll take a look around the pedal to see if any problems are lurking there.

I've got the rad out and it's clear that the tips of the fan blade did bend enough to cause the damage. So,I'll get the rad repaired / replaced.

What's the advice on the viscous coupling?The fan seems to spin fairly freely which I assume means the viscous coupling is shot? I've heard stories of running without a fan at all and just relying onan electric fan. I already have this - is that feasible or wise?

Thanks for your advice.

Ray