hi guys

a few weeks ago i had a new crankshaft pulley fitted due to a problem with the belt drive ring becoming detatched from the pulley;

i have noticed that since i have had the car back, it seems that the fan is more on than before, even though the temp gauge never climbs above normal, ie centre of gauge as it has always done so the engine is not getting overheated,

the front of the car was stripped out to obtain access to the pulley etc, but i wonder if there is something they may have not done correctly in the re fitting of the fan which has caused it to be coming on ten times more than it used to,? even starting the car in the morning first time, the fan cuts in even before i get out the gate,?? it doesent stay on permenant but cutting in and out regardless to the engine temp it seems

any ideas on what i can check or what may be the cause and the remedy; ? i havn't been back to the garage yet as they are on hoidays here in france, ( indy )


bob

Do you mean the engine cooling fan?

sorry yes the engine fan, i have just started it up from cold and it started running straight away; im assuming that it will normally cut in from time to time and not constant ??, as you can here it when it cuts in, and it didnt cut in as much before,

i would notice it mostly when in warm weather, 30 plus temp outside and going slow in traffic and the like ?

i can spin it when the engine is not running so its not stuck on bob

If they've had all the front off they may have drained the system, make sure it's bled ok, heaters are getting warm and header tank is full. The fan does come on when cold, from the previous journey if that makes sense, but should drop out fairly quickly once engine revs go above about 2,000 RPM. Also are all your hoses getting warm.

hi

yes they had the front in bits, !! they did also have the rad out so obviously drained the system ; it does cut out so not running all the time, the heating is fine, the gauge has no fluctuation and steadily climbs to 12 o clock, i will see if it stops running at idle after a few mins and if not, try to stop it with the newspaper;

where are the bleed valves? and would it just be a case of cracking them open to see if any air comes out with engine off? or how should i check

bob

Bleed valves:

One on the header tank
Two on the hard plastic tubing running across the front of the engine to the EGR (contains the EGR thermostat)

Big flat bladed screwdriver needed (for size not tightness)



Can we just check this is not an electric fan in front of the rad and condensor (which comes on for the aircon), but the viscous fan run off the engine pulley? This could simply be the viscous coupling has gone south for some reason ?

I only ask because I run without the viscous fan fitted, and in this warm weather the electric fans come on pretty soon if stationary. .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
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hi joe

no not the air con fan behind the grill; it is the big fan sitting behind the rad; with the engine off obviously; it dos turn freely but under some tension if thats the right word, ie i cant give it a quick spin and it revolves a revolution, you can turn it but i woulden't say free without resistance ;

but it is certainly on more times than off, i waited for about five mins from starting cold, but it did not stop; it started the moment i turned the key, it is 33 degrees here at the minute, shade temp, and thought that may be the reason, but too much coincidence that i noticed it straight after taking car out of garage after they had stripped the front out to get at the main pulley;

i could not stop the fan with a rolled up newspaper, no matter how hard i pushed;

i have bleed it and no sign of air and the tank is where it should be, as is the engine temp gauge, the heating etc is faultless;

its just odd that i have never had a problem in five years plus, until i have a pulley change; but i dont know if the fan would have needed to come off to replace the crankshaft pulley ?

so i dont really know what to do next; You mention is would run without the fan no problem ,? is that a big job to take it off, and is it just a case of unbolting it and thats it ?

bob

diesel Dave has described exactly what mine does of recent weeks, fan comes on when cold start, from the previous journey and very shortly shuts off, glad this thread is here as I was thinking it may of been an issue.....but you know these old girls , they don't often go wrong.....!!!...!!! Lol

They would most likely have removed it just for ease of access.

IIRC the viscous fan bolts on to the the water pump pulley. Requires 2 x fan spanners to take it off. Has a left hand thread so you undo it the wrong way!

Up to you if you decide to remove and run without. My guess is it is the hot weather that is causing this, sounds like it is working as it should. ( My viscous fan was shot and just ran/spun regardless of outside or engine temp, so now run with out it and have also removed the shroud, makes access to things at the front of the engine much easier). If i was in a more urban area with lots of traffic and regular high temperatures - + 30 celsius, i would probably have kept it on. .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

hi joe

well, im in the middle of the dordogne, so countryside for as far as you can see and nearest towns/built up areas are 36 and 66 km away,

your comment regarding you thinking it is running as it should ! im not so sure on ?; the car is kept in a huge barn when not in use, and it is very cool during the day even with outside temps up around 38/39; yet starting it inside cool in the morning before the sun is up still brings the fan on most times; so i cant really see that it is this summer heat causing it, , but im not of coarse saying what you suggest is not the case;

also i tried the newspaper test but impossible to stop the fan revolving, but perhaps i had left it too late to try that as it was running over 5 mins at that stage and perhaps fully locked in ?

perhaps i will leave things as they are for now, as the car seems to be running without any issue other than the fan noise, and see how it goes in lesser temp conditions; and if it persists, then i will consider taking it off;

in order to do that, would i have to drain the system and remove the rad to get at it, ? or is it a job best left to someone more used to dealing with that sort of maintenance ?? like a garage; ? as it all looks a bit tight ?

bob

I'm not sure about the TD6 but the fan on the Petrol variant (certainly the AJv8) is controlled thermally and also with an electronic lock up clutch.



My viscous fan is audible from cold for about 15-30 seconds, I assume this is some sort of test cycle. The only other time I've really noticed it is in France a few weeks ago in 37C heat.

Perhaps you're focusing on the noise now that has always been there? 

Last edited by dan_uk_1984 on 12th Jul 2017 1:01pm. Edited 2 times in total

No need to drain down. You have to "release" the shroud in place in order to get enough room to get the spanners in place. It is a bit of a fiddle, but once you break the lock of the nut on the pulley, the fan should just spin off, then you can pull it up and out, leaving the shroud in place.

Oh, take the front cover off the engine as well.

Dan's photo answers a previous thread enquiry about viscous fans having an electrical connection. My TD6 doesn't have one. .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Unnecessary quote removed

hi Dan and Joe;

thanks for the replies; yes i am focusing on the noise of the fan but only because it is now coming on in conditions it did not come on before, we do get regular high temps down here in the summer, but i just dont recall it coming on and staying on as long as it is now especially from cold start;

it did come on as dad suggests for 30 secs or more in the past now and again but nowhere near as much as it is now, but i dont believe it is coming on out of necessity of over heating, as there is no evidence of that from what my limited knowledge can assertain, ! asertain ? asc; figure out !!

so i will sit back and give it a chance to cool down, and see how it runs then, but it seems straight forward enough to remove, , i assume i can buy the spanners in question from somewhere on line ?

thanks guys for your time, as always, the speed and offers of help and advice never fails to impress me with this superb forum