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Old 30th October 2006, 18:38   #1
Mike
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Rover 75 V8

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Default How to change those 'back 3' spark plugs on the KV6

Changing the three plugs on the rear bank of the KV6 can appear daunting at first sight - mainly because standing by the engine it is not possible to see where they are!

However it is a straightforward job ,though it needs a bit of time. Follow these instructions and you shouldn't go wrong (pics to follow)

(n.b.the front plugs are a doddle. 25 mins. max. Undo the 2 acoustic engine cover bolts, remove cover and then remove the leads)


Tools required:

* a few short extensions for your ratchets (Preferably 3/8 and 1/4 drive)

* spark plug socket

* magnetic tool

2. how to do it:

1. pull the rubber bonnet seal off from the back of the bay

2. unclip the offside plenum cover that covers the brake fluid reservoir

3. using an 8 mm socket remove the 2 bolts holding the access plate onto the face of the bulkhead. Pull it forward slightly towards the engine and lift upwards, releasing the rubber bung that secures the wiring harness (the pic at the bottom of this how to shows the opening in the bulkhead once the plate is removed - note this view is with the manifold off the engine!)

4. look through the hole where your scuttle cover was and you can see the 3 coils that fit over the plugs. Pull the silver metal clips upwards to release the electrical plug that pushes onto the coil (one at a time starting with the one nearest the offside).

5. using a long 8 mm socket undo the 2 bolts that secure the coil to the cam cover. Just before you undo them double check which two bolts they are as there are one or two more bolts down there. It’s easy to see which they are. They are the ones diagonally mounted across the coil. Undo each of the bolts then unscrew them the last few turns by hand so you've got hold of them - take care when pulling them out!

6. Gently waggle and lift the coil upwards to release it from the plug. Now take the appropriate spark plug socket and, using a suitable length extension place it over the plug. When the socket is seated fit the ratchet onto the extension and remove. It’s easier to put the ratchet on after you've put the extension onto the plug.

7. Unscrew the spark plug. Remove the ratchet and extension and then use a little extending magnetic tool to push into the spark plug hole and withdraw the plug. Lift it clear and drop your new plug into the hole with either the magnetic tool or just lower it in. Use just the extension and socket to hand tighten the plug then attach the ratchet and gently do up.

DON'T OVER TIGHTEN.


8. Push the coil back onto the plug, refit the two 8 mm bolts and use the long 8 mm socket to hand tighten, then attach the ratchet and gently do up.

DON'T OVER TIGHTEN.

9. Pull the silver metal clip on the coil upwards again and reattach the electrical plug - push the silver clip fully downwards to lock the electrical plug into place. Repeat this process for the remaining plugs.

Refit the access plate and plenum cover and replace the rubber seal

(many thanks to courier118 for the material used to put this how to together )



Disclaimer:
You are responsible for any work or modifications carried out on your car and you undertake any such work at your own risk. Neither the 75 and ZT Owners Club nor the original authors in this thread can be held liable for anything that may happen as a result of you following this thread's posts.
Any modifications should be reported to your insurance company.
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Old 1st July 2007, 20:57   #2
chris75
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2001 Rover 75 2.0 v6 Connoisseur Saloon

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Default How to change those 'back 3' spark plugs on the KV6

I've had a satisfying afternoon replacing the 6 spark plugs on the Kv6 . This was the first time I have changed them , so I read up the advice in Haynes , Rave , and various posts here on access to the rear 3. However, even after removing the access plate in the bulkhead , I really couldn't see what I was doing , so after a coffee and a smoke I decided that if the wipers and the scuttle / apron below the screen also came off then it would be so much easier to see and touch what was needed ! The wipers and apron came off very quickly ( don't drop the conical inserts under the nuts - they can jump ! ) and from then on the job was a doddle . Also gives unrivalled access to the plenums and the pollen filter. Hope the attached pics might help someone.

Disclaimer:
You are responsible for any work or modifications carried out on your car and you undertake any such work at your own risk. Neither the 75 and ZT Owners Club nor the original authors in this thread can be held liable for anything that may happen as a result of you following this thread's posts.
Any modifications should be reported to your insurance company.
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