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Thread: Advice sought - plenum/oil cooler on 3.2V6

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    Regular Member MysteryElite's Avatar
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    Default Advice sought - plenum/oil cooler on 3.2V6

    I'm looking to change the oil cooler and possibly the oil cooler feed pipes on my 2003 3.2. I have a serious oil leak which has been tracked to the oil cooler - opinion of the mechanic was one of the pipes has gone, although from the colour of the water expansion bottle I think the cooler has failed (see pics below).

    Having researched a bit, I'm looking to strip this down and do it myself. It's been a while since I've wielded spanners under a bonnet, but reasonably confident I can do this. I was hoping for some advice on a couple of areas if anyone has had the plenum off one of these.

    First, does the coolant flow throught the plenum? I realise that at some stage I need to drain the coolant but do I need to do this before I unbolt and move the plenum?

    Second, am I right that the fuel line needs to be disconnected to move the plenum, and that the screw at the green arrow, pic 1 relieves the fuel pressure and the connector is at the red arrow, same pic? Is this a simple clip to undo?

    Finally, I think the plenum is secured with six T30 bolts, five at the bottom of the holes from the top of the plenum (red arrows, pic 2) and one lower down (green arrow in this pic) - does this sound right?

    Hopefully, thanks in advance!

    Pic 1


    Pic 2

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    No coolant in the plenum IIRC.

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    Done my coil packs this weekend,Just unscrew cap and push needle,watch for petrol spray,push pull connector.water only goes in and out of throttle body ,pull pipes will drain a little coolant. six T30 screws and your away.

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    I changed the oil cooler on mine a couple of years ago and took lots of pictures. The only pain was the nuts on top of the oil cooler its self. If you want, I'll dig out the pickys for you.
    Simon M.

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    I changed the oil cooler on mine a couple of years ago and took lots of pictures. The only pain was the nuts on top of the oil cooler its self. If you want, I'll dig out the pickys for you.
    Simon M.

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    Regular Member MysteryElite's Avatar
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    Quote Originally Posted by noudder72 View Post
    Done my coil packs this weekend,Just unscrew cap and push needle,watch for petrol spray,push pull connector.water only goes in and out of throttle body ,pull pipes will drain a little coolant. six T30 screws and your away.
    Many thanks - that's really helpful, much appreciated. Hopefully I can progress at the weekend weather permitting.

    Quote Originally Posted by samarkh View Post
    I changed the oil cooler on mine a couple of years ago and took lots of pictures. The only pain was the nuts on top of the oil cooler its self. If you want, I'll dig out the pickys for you.
    Simon M.
    Thanks for the offer - I may take you up on that depending on how I get on.

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