cooling fan

Sjacobsuk · Jan 4th, 2015, 01:35

suspected the rumbling noises were coming from my water pump and replaced it with no joy. Pretty sure it's the viscous fan hub. Does anyone have one in good shape that's going spare? I've got a 1970 E with the five-blade fan.

Someone may have a thought on whether I am better off buying the blades from brookhouse without the viscous hub?

classicswede · Jan 4th, 2015, 09:47

I would do an electric fan conversion. You could just remove the fan as a temporary measure to prove it is the problem. As long as you do not leave it running stood still for any amount of time it should keep cool without any fan.

Sjacobsuk · Jan 4th, 2015, 10:26

Thanks for the thoughts. I was thinking the same and was going to remove the fan to confirm the culprit. Couldn't bring myself to drain the radiator again yet!

Electric fan conversion seems and expensive solution? I'd like to keep it cheap and cheerful if I can on this fix.

Derek UK · Jan 4th, 2015, 11:42

Cheap and cheerful can be had by fitting a standard 4 blader. For more money, one of the asymmetric 5 bladers would also work well. Electric fan conversion doesn't have to be expensive if you use one from a modern car. Make sure it blows in the right direction! Fitting it in front of the rad will take a bit of thought to get the right one and will need a sensor and some wiring. Depends if you're up for it as a project. 12" OK for an Amazon but an 11" should be fine too. Don't know if the 1800 rad has a shorter height than an Amazon.

Sjacobsuk · Jan 5th, 2015, 13:01

Sounds like I'll do some more investigation. Pulled the old one back off last night and that's definitely where the rattle is coming from

Tail · Jan 13th, 2015, 23:59

Quote:

Originally Posted by Sjacobsuk

Electric fan conversion seems and expensive solution? I'd like to keep it cheap and cheerful if I can on this fix.

£15 off e-bay isn't too steep with a manual switch to turn on and off

take your pick

http://www.ebay.co.uk/sch/i.html?_fr...r+fan&_sacat=0

Sjacobsuk · Jan 25th, 2015, 15:54

"Sjacobsuk;1818786]Sounds like I'll do some more investigation. Pulled the old one back off last night and that's definitely where the rattle is coming from"

In case anyone is following this thread - I bought the new water pump from Brookhouse and you'll note on Simon's site is it says "May need modification for the Aqueous fan".

My rattle was actually due to the length of the bolts that attached the fan pulley to the end of the water pump. My original bolts were just slightly long and were just touching the new pump housing which is a different shape than the orginal. hence the noise and some shavings. Shortened the bolts and the problem was solved.

FYI - the other modification that I needed to make was to recess the piece that forms the spindle for the fan itself. The new pump axles extend about 3 mm further than the originals and you need to drill out some material to make the parts sit flush.

Jan 4th, 2015, 01:35	#1
Sjacobsuk Member Last Online: Jan 23rd, 2017 10:28 Join Date: Mar 2011 Location: Guildford	cooling fan suspected the rumbling noises were coming from my water pump and replaced it with no joy. Pretty sure it's the viscous fan hub. Does anyone have one in good shape that's going spare? I've got a 1970 E with the five-blade fan. Someone may have a thought on whether I am better off buying the blades from brookhouse without the viscous hub?

Jan 4th, 2015, 09:47	#2
classicswede Trader Volvo in my veins Last Online: Today 00:23 Join Date: Dec 2004 Location: Anglesey	I would do an electric fan conversion. You could just remove the fan as a temporary measure to prove it is the problem. As long as you do not leave it running stood still for any amount of time it should keep cool without any fan. __________________ http://www.classicswede.org www.classicswede.co.uk

Jan 4th, 2015, 10:26	#3
Sjacobsuk Member Last Online: Jan 23rd, 2017 10:28 Join Date: Mar 2011 Location: Guildford	Thanks for the thoughts. I was thinking the same and was going to remove the fan to confirm the culprit. Couldn't bring myself to drain the radiator again yet! Electric fan conversion seems and expensive solution? I'd like to keep it cheap and cheerful if I can on this fix.

Jan 4th, 2015, 11:42	#4
Derek UK VOC Member Last Online: Today 15:22 Join Date: Jul 2006 Location: Chatham	Cheap and cheerful can be had by fitting a standard 4 blader. For more money, one of the asymmetric 5 bladers would also work well. Electric fan conversion doesn't have to be expensive if you use one from a modern car. Make sure it blows in the right direction! Fitting it in front of the rad will take a bit of thought to get the right one and will need a sensor and some wiring. Depends if you're up for it as a project. 12" OK for an Amazon but an 11" should be fine too. Don't know if the 1800 rad has a shorter height than an Amazon.

Jan 5th, 2015, 13:01	#5
Sjacobsuk Member Last Online: Jan 23rd, 2017 10:28 Join Date: Mar 2011 Location: Guildford	Sounds like I'll do some more investigation. Pulled the old one back off last night and that's definitely where the rattle is coming from

Jan 25th, 2015, 15:54	#7
Sjacobsuk Member Last Online: Jan 23rd, 2017 10:28 Join Date: Mar 2011 Location: Guildford	"Sjacobsuk;1818786]Sounds like I'll do some more investigation. Pulled the old one back off last night and that's definitely where the rattle is coming from" In case anyone is following this thread - I bought the new water pump from Brookhouse and you'll note on Simon's site is it says "May need modification for the Aqueous fan". My rattle was actually due to the length of the bolts that attached the fan pulley to the end of the water pump. My original bolts were just slightly long and were just touching the new pump housing which is a different shape than the orginal. hence the noise and some shavings. Shortened the bolts and the problem was solved. FYI - the other modification that I needed to make was to recess the piece that forms the spindle for the fan itself. The new pump axles extend about 3 mm further than the originals and you need to drill out some material to make the parts sit flush.

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