Rover 75 Dismantle Front - Fix Radiator Fan - without disturbing AC - MG-Rover.org Forums
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post #1 of 46 (permalink) Old 29-08-2005, 14:28 Thread Starter
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Rover 75 Dismantle Front - Fix Radiator Fan - without disturbing AC

My radiator fan recently stopped working on my Rover 75 1999 CDT. After reading through the forums it was clear that the problem could be as simple as corroded fan connections, so I decided to investigate by dismantling the front of my car. I managed to lubricate the fan motor and clean its connectors, this fixed the problem and my radiator fan is now functioning as normal. I could have replaced the motor + relays if required to do so, but did not need to in this case.

Here is a *ROUGH* guide on how to do it in case anyone has similar problems.

DISCLAIMER: If in doubt do not attempt! This is a guide only!

You'll need -
  • One Rover 75 (I prefer White Gold, Royal Blue or Copperleaf Red, but you can use any colour )
  • Socket set
  • Phillips screwdriver
  • Torx set
  • 3-5 hours spare time

More to follow...
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post #2 of 46 (permalink) Old 29-08-2005, 14:57 Thread Starter
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Remove Undertray and Bumper

Start by removing the screws that attach the engine undertray to the front bumper. These can be found along the lower rim of the bumper denoted by (1)

Next remove the screws that attach the wheel arch liner and bumper, there are three scews underneath the car (2) and one bolt in the wheel arch (3). Repeat for both LH and RH sides.
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File Type: jpg IMAGE_087_wpoints.JPG (21.6 KB, 1348 views)

Last edited by Will; 29-08-2005 at 16:08.
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post #3 of 46 (permalink) Old 29-08-2005, 15:05 Thread Starter
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Remove Undertray and Bumper

Open the bonnet and remove the screws that fix the Bumper to the bonnet locking platform, there are two at (1), three at (2) and two at (3).

Next, gently pull the left hand side of the bumper away from the wing where they join at the wheel arch. Repeat process for right hand side too. These should 'pop' out.

Standing infront of the car, pull the bumper toward you gently. The bumper should move freely in your direction. Lower it to the ground (keep it upright to avoid damage to the finish) and then release the wiring socket that attaches the front bumper to the body. This can be found on the left hand side of the car (as shown in picture) below the headlight unit.

Remove the bumper from the work area but keep it somewhere safe, be sure not to scratch it!

You should be left with your car in the state shown in the second image.
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File Type: jpg IMAGE_085_wpoints.JPG (37.2 KB, 1407 views)
File Type: jpg IMAGE_084.jpg (52.0 KB, 1542 views)

Last edited by Will; 29-08-2005 at 16:08.
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post #4 of 46 (permalink) Old 29-08-2005, 15:13 Thread Starter
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Remove bumper armature

Loosen and remove bolts and nut in area (1) and area (2) Each contain 4 bolts and 1 nut - For a total of 8 bolt and 2 nuts. Keep these safe!

Then remove cross member as shown in the 2nd picture.
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File Type: jpg IMAGE_084_wpoints0.JPG (27.8 KB, 1228 views)
File Type: jpg IMAGE_084_warrows.JPG (28.0 KB, 1243 views)

Last edited by Will; 29-08-2005 at 16:09.
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post #5 of 46 (permalink) Old 29-08-2005, 15:31 Thread Starter
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Remove bonnet locking platform

This bit is time consuming and I didn't have all the photos, so I recreated them but you'll notice the bumper is still on when it shouldn't be !

Start by removing the ancillary components attached to the bonnet locking platform.

Picture1: Remove the bolt securing the pipe (1) and the torx scew attaching the bracket.

Picture2: remove the torx screw attaching the bracket on the otherside (3). and for BOTH SIDES - remove the bolts attaching the bonnet lock mechanisms (5) and (4). The lock mechanisms will drop down, but they can be refitted later!
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File Type: jpg IMAGE_088_wpoints.JPG (33.9 KB, 1268 views)
File Type: jpg IMAGE_090_wpoints.JPG (33.0 KB, 1185 views)
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post #6 of 46 (permalink) Old 29-08-2005, 15:37 Thread Starter
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Remove bonnet locking platform

Next you need to *MOVE* the power steering cooling loop that sits proud of the radiators from the lower bonnet locking platform. They are attached with one bolt either side. By removing the bolts the cooling loop can be lowered to the ground and moved to one side. The 1st picture shows the location of this loop and the bolts, they are behind the bumper armature (which should be off by now)

You may find you need to also detach the temparature sensor (if fitted) at this time. This can be done with a single bolt that holds it to the power steering cooling loop bracket.

Next, undo the two primary bolts that mate the bonnet locking platform and the wings. These are shown in the 2nd picture as (1) and (2).
Attached Images
File Type: jpg IMAGE_084_psloop.JPG (28.3 KB, 1146 views)
File Type: jpg IMAGE_084_wpoint1.JPG (27.8 KB, 1197 views)

Last edited by Will; 29-08-2005 at 16:09.
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post #7 of 46 (permalink) Old 29-08-2005, 15:43
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Will - top article - I've copied it over to the "How To" forum and closed this thread, to save it getting diluted.

Great stuff....many thanks!
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post #8 of 46 (permalink) Old 29-08-2005, 15:50 Thread Starter
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Remove bonnet locking platform

Now the fun bit...

Standing infront of the car - You need to move the locking platform toward you slightly, this will allow you to release the wiring connectors for the headlamps and any other ancillaries attached to the bonnet locking platform.

on Diesel models, you'll need to lift the bonnet locking platform up and over the air duct fixers. The 1st picture shows the air duct (1) and the fixing points which pertrude downward (2,3 & 4). They do not need to be removed as they are attached to the locking platform and will go with it, you just need to make sure you lift the platform up enough to clear them from their mating holes in the duct.

Now proceed to remove the headlamp connectors on either side, and the temperature sensor connector.

With everything detached you can now move the bonnet locking platform to one side, giving you full access to the radiator assembly as shown in the 2nd picture.
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File Type: jpg IMAGE_089_wpoints.JPG (33.8 KB, 1105 views)
File Type: jpg IMAGE_082.jpg (63.3 KB, 1686 views)
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post #9 of 46 (permalink) Old 29-08-2005, 16:07 Thread Starter
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Move fan assembly

Start by removing the bolts that hold the fan assembly to the radiator, these are shown in Picture 1 as (1,2,5 and 6), note that 5 and 6 attach the fan assembly right at the bottom of the radiator. You'll need to remove the brackets (3) and (4) if you haven't done so already.

You can release the fan itself by holding the nut in the centre (0) and rotating the fan anti-clockwise but *DO NOT DO THIS UNLESS YOU MUST* as ideally you should replace the fan with a new one after detaching it - although I found I could refit my fan without it being noisey!

This is the 'clever' bit, with the bolts removed. The fan assembly can be hinged around the air con pipes on the left hand side, thereby creating a kind-of door, which allows you enough acccess to get behind the fan motor and also access the fan relay.

To do this you'll need to apply some upward force to the left hand side of the fan assembly. This is shown in Picture 2. Once lifted over the prang (Picture 1, point 3) extending from the radiator, you can pull the fan assembly away from the car. That's it!
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File Type: jpg IMAGE_082_wpoints.JPG (35.2 KB, 1346 views)
File Type: jpg IMAGE_083_warrows.JPG (36.3 KB, 1358 views)
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post #10 of 46 (permalink) Old 29-08-2005, 16:11 Thread Starter
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Lubricate/Clean or Replace

With access to the fan motor from behind the fan assembly you can either
  1. Replace the fan motor by removing the 3 torx screws that attach it to the assembly.
  2. Access the fan motor relay pack
  3. Lubricate the fan motor and its connectors (I used white grease)
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post #11 of 46 (permalink) Old 29-08-2005, 16:18 Thread Starter
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Reassembly

Reassembly is basically these instructions in reverse with a few caveats -

When reassembling its not a bad idea to check the fan operation regularly (ign II + air con) to ensure you haven't introduced any noise (i.e. components that might now touch the fan when its moving)

When you come to re-attach the bonnet locking platform, you need to attach the locking mechanisms as soon as the platform is resting on the chassis about to be refitted. Just use one loose bolt on each locking mechanis to allow flexiblity whilst you reattach the platform. Be sure to put the the cables back in their guides underneath the bonnet locking platform as otherwise they could hang down and interfere with the fan.

Ensure you tighten up the bumper armature properly as this contains the towing eye for the car. If this isn't properly fitted and comes off when your being towed I dread to think what will happen....


When reattaching the bumper now is the ideal time to get rid of that nasty gap in the shutline between the bonnet and bumper, so be sure to push the bumber up and in when tightening the screws that attach it to the bonnet locking platform. Check with the bonnet closed that the gap is acceptable before putting away your tools.

Finally, you may notice that after the temperature sensor has been detached and reattached that the dashboard reading is very low (i.e. -29c) This reading will level out as you drive the car, I found my reading returned to normal after about 15 minutes driving. I don't know why it does this.
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post #12 of 46 (permalink) Old 29-08-2005, 21:07
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When i put the bumper back on i put 2 washers under the bumper where the bolts are!
this done the job i now have no panle gap at all!
How Rover should of done it! lol

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post #13 of 46 (permalink) Old 29-08-2005, 21:16
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Good post Will. Can we pinch it for the 75 club thats being set up?
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post #14 of 46 (permalink) Old 29-08-2005, 21:58
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Now THAT is what I call a How To !

Top marks Will, I'm sure there'll be many grateful people on here
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post #15 of 46 (permalink) Old 29-08-2005, 23:37 Thread Starter
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Matt - Please redistribute as you like. Good idea with the washers Alex, perhaps this could be made into another how-to article "How to improve the bonnet shutline on the Rover 75"
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post #16 of 46 (permalink) Old 30-08-2005, 12:04
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Speaking to Alex elsewhere, he also recommended washers go under the grill aswell to lift it a few mm to further close the (scary) gap.

Alex can I just clarify putting washers under the bumper will close the gap of bumper to wings ?
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post #17 of 46 (permalink) Old 15-09-2005, 07:29
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Will - have just read your excellent article on "how to change the radiator fan". Would you consider this to be a one man job or are two pairs of hands required?
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post #18 of 46 (permalink) Old 24-09-2005, 20:06 Thread Starter
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I did this on my own, but two hands would have made it easier when removing the bumper and bonnet locking platform.
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post #19 of 46 (permalink) Old 25-09-2005, 08:12
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Quote:
Originally Posted by RichK
Speaking to Alex elsewhere, he also recommended washers go under the grill aswell to lift it a few mm to further close the (scary) gap.

Alex can I just clarify putting washers under the bumper will close the gap of bumper to wings ?
Yes it will!

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post #20 of 46 (permalink) Old 14-04-2006, 20:33
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I want to give it a go, but Im crap at this sort of thing...however I really need to get rid of this gap under the bonnet...its actually worse than the picture shows.

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