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MG TD TF 1500 - 7 blade fan advice needed

I'm finding the TD heating up quite a bit on any long climbs etc and the weather here spikes to well over 40 C in the summer months so after reading the tech piece on O'Conner Classics I thought I'd change the fan over to the 7 blade, plastic unit from the MGB. Before I begin any comments? things to watch our for? warnings?? Thank you in advance. ..... Chris
Chris Malcolm

Chris,

I have found the 7 blade fan works very well. Do be careful when tightening the bolts. They are prone to snapping quite easily.

Tom
Tom Balutis

HI:
I second Tom comments, I have a seven blade in my car and it has been a great help in keeping the car cooler in Puerto Rico hot and humid weather.

Stuart
Stuart J. Ramos

Do you leave out the big spacer on the stock system, or just bolt the 7 blade on?
gblawson(gordon)

Gordon, as I remember, you leave the big spacer in order to have the fan close to the radiator for efficiency. The MGB fan does have a bigger hub and larger holes for the bolts. You use washers under the bolt heads to cover the larger holes; and to fit down into the recess and center the MGB fan.

Dallas
D C Congleton

Hi Chris,

Good luck with the new blade but I hope you've first advanced your static ignition 4-5degrees! Around 4mm on crankshaft pulley is a good starting point since timing at tdc is a major cause of overheating - see Archives.

Cheers, John.
J C Mitchell

Chris, if you don't see high temps while idling or normal driving then the new fan will not help. My TF experienced High temp readings at high speed cruising and mountain climbs. I tried the water wetter treatment and adjusted timing to no avail. I just recently had a new 3 row core put in and have added a performance mod to the engine which puts even more of a strain on the cooling system and the temp never gets above 80 c with outside temp at 95 f. If it's heating up while moving then the fan is not going to move any more air than you are already doing. If it's heating up to much at slow speeds or idle then the fan should be of some help.

LaVerne
LED DOWNEY

Thank you everybody for your thoughts. I think I'll give it a try as it doesn't sound like I'll do any damage. John - point taken - I'll give the timing some investigation.... LaVerne, I have an idea you might be right here but it is difficult to know as there is no traffic here to speak of - so no slow speed or sitting in traffic heating problems. Where I do notice the biggest change is (please, no laughing here!) is we have a constant northernly wind blowing so driving south (with the wind) I experience significantly higher temperatures, coming back into the wind the temp drops right back down. This is on a coast road so there is no significant change in elevation. My speed tend to be on the slow side (3500 rpm) so I guess the question is will the fan pull more air through the rad at those speeds..... I'll report back. ... Again thanks everyone for the comments... Chris
Chris Malcolm

I have been seeing this fan on eBay- Anyone tried it?

http://cgi.ebay.com/ebaymotors/MGTD-mgtf-MG-TD-TF-HIGH-PERFORMANCE-COOL-FAN_W0QQitemZ290253427987QQcmdZViewItem?hash=item290253427987&timeout=1218803312375

Dallas
D C Congleton

Those blades must be really flexible... they have quite the bend which i assume straightens out?
gblawson(gordon)

I don't think it will straighten out very much. Probably bent like this to "grab" a lot of air. Also will "grab" a lot of horsepower!

One thing to mention about plastic fans, such as the MGB fan, or these nylon fans, is they have been known for developing small cracks and checks in the hub area - partially due to under hood temperatures, and due to the continued curing and hardening of the plastic.

I has three factory fans on my Jag XJS V12 replaced on warranty in 8 years.

FWIW
Dallas
D C Congleton

This thread was discussed between 14/08/2008 and 15/08/2008

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