single port fan in a twin port shroud

[67westy]

Just taken my fan out again to find it isn't quite true. I have another to replace it with but I have just realised both of these are single port fans (30mm wide) instead of the larger twin port one. Will I be losing a lot of cooling from this? I think I will have to use it as a temporary measure at least for now although I haven't had any overheating issues with the engine and it's been like that for 2-3 years now......

Another reason to think about building a new engine I guess :lol:

 

[sparkywig]

Yes, you'll lose a lot of cooling as the gap between the fan and fan housing will be too great to pull air in.
It's like a water pump, the water will spill back out through the gap.

 

[67westy]

Cheers Sparky, just ordered a new one so hopefully that will arrive tomorrow.

 

[mattd1984]

I had the same issue with mine. Amazing how certain engine builders can miss these things! :shock:

 

[Trikky2]

I had the same issue with mine. Amazing how certain engine builders can miss these things! :shock:

Indeed. Its rather obvious and makes one worry what else they have "missed", as you politely call it.

 

[67westy]

If I had bought it as a new engine I would of been a bit pissed off! Mine was a secondhand turnkey job so no doubt it had been messed around with over the years. I know there are a couple of bits that could do with looking at so very tempted to rebuild over the winter now.

 

[Matt_B]

I've found out the same - the hard way! Cracked cylinder head whilst 300 miles from home! Also some tinware missing too.

Oh well, engine out and hopefully this time be a bit more vigilant and less trusting of others.

 

[six]

I had the same issue with mine. Amazing how certain engine builders can miss these things! :shock:

Indeed. Its rather obvious and makes one worry what else they have "missed", as you politely call it.

:lol: :lol: :lol: if it was assembled by the chaps that done mine.. LOTS! "missed" and also "adapted" things to fit