Fan rubbing on tinware

[stegaj]

Hi
I bought a 1970 with a recon engine bought by previous owner. It sounds like the fan has started rubbing on the tinware especially on tick over. When I apply some leverage on tinware it does go off and is less noticeable when driving. Just wondering if there are any suggestions while the engine is in situ or does it have to come out to resolve it?

Thanks in advance

Darren


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[who?1]

Has it had an alternator conversion done? Make sure the four bolts are tight, also that the bolts holding the fan shroud down are also there.

 

[RePhil]

Try loosening the screws securing the fan shroud to the tinwear over the barrels. Push/pull the fan shroud/housing to see if you can get it in a position to remove the rubbing & re-tighten the scews whilst holding in the "good" position.

Over tightening the fan belt could also cause fan noise.

At least check these before pulling the engine.

Phil.

 

[stegaj]

Thanks guys that's great advice for a newbie [SMILING FACE WITH OPEN MOUTH][THUMBS UP SIGN]


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[Yorkieman]

Has the fan housing/fan been powder coated sometimes this extra thick coat can cause the whole thing to catch, or it could be the alternator not in the correct position on the stand.

 

[Resto-raider]

I had the same with mine. What i did is loosen the strap that holds the alternator and then push back or pull forwards on the tunear and redo the strap. Problem solved

 

[jonboylaw]

Is it correctly shimmed?


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[stegaj]

Will investigate at the weekend thanks I am thinking something has moved as it was definitely not doing when i bought it and have done about 100 miles before I first heard it


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[gvee]

Done this myself on the weekend when rebuilding the engine. Here's how I sorted it:

1. Undo the top pulley nut: wedge a screwdriver in the notch on the front half of the pulley and the alternator body and then crack the nut with a 19mm spanner.
2. Remove front half of the pulley ensuring you keep all the shims in the right place
3. Remove the fanbelt
4. The alternator should now spin freely - so it should be easier to hear the sounds of it catching
5. Make sure the fanshroud doesn't rock side to side. If it does you need to tighten the screws on either side of the fanshroud (that pin it to the cylinder heads). In fact, just check they're tight anyway!
6. Make sure that the 4 screws that hold the alternator backing plate to the fanshroud are good and tight too.
7. Loosen the alternator strap (2x13mm spanner for nut and bolt)
8. Whilst spinning the alternator move the alternator back and forth to see if you can find a spot where it isn't catching
9. Tighten the alternator strap back up
10. Give it another spin to make sure it is still spinning true
11. Once you're happy you just need to refit the pulley wheel (complete with fanbelt)!

Good luck!

 

[stegaj]

Ok so it turns out the generator strap had snapped and was just hanging there. In addition to this one of the four bolts that hold the backing plate was missing (the awkward one). Now had the strap welded so will attempt to refit and adjust without rubbing. Wasn't entirely sure the importance of the generator strap but I guess I will find out soon...


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