Rachel S · Jul 7, 2015

Can someone tell me if it's easy to change the manifold ( do you need lots of space, huge expensive equipment and six men) in a series 3 and any tips please?

One of the bolts has sheared off and another has a damaged thread so we can't get a tight seal on the new exhaust. I know you can take it off and fix the bolts etc but we don't have the space or skills for that

ben waine · Jul 7, 2015

Diesel or petrol? I know I found it nearly impossible to get a new manifold for mine a few years back, so do your best not to damage it further when removing! (Mine was diesel)
Getting it off is reasonably easy, take off the intake manifold then the exhaust, there are studs threaded into the engine block with nuts on the end, 7/16 i think, can't remember, anyway be gentle with the studs because if you snap them, you've got a ball ache on your hands getting it out! New ones can be purchased easily though!

Rachel S · Jul 7, 2015

ben waine said:
Diesel or petrol? I know I found it nearly impossible to get a new manifold for mine a few years back, so do your best not to damage it further when removing! (Mine was diesel)
Getting it off is reasonably easy, take off the intake manifold then the exhaust, there are studs threaded into the engine block with nuts on the end, 7/16 i think, can't remember, anyway be gentle with the studs because if you snap them, you've got a ball ache on your hands getting it out! New ones can be purchased easily though!

It's the petrol 2.5.

Thank you

chris7 · Jul 7, 2015

The petrol Exhaust manifolds are readily available, got mine from Famous Four! As Ben says its pretty straightforward to replace but remember on replacement not to over torque the bolts! Good luck kind regards. Chris

John S · Jul 8, 2015

If you are doing this job, worthwhile doing the exhaust downpipe which comes

off the manifold. The area at the joint if not recently replaced will be well rusted. There are three set screws that hold the joint between the pipe n the manifold and three brass nuts to lock it up, not expensive to replace and you'll have clerance to do it easily. Its got to come of anyway.

dominicbeesley · Jul 9, 2015

The manifold comes off easily. I'd remove the carb first and try and split the exhaust and inlet manifolds whilst its on the car as you can get a decent swing on it.

I'd try drilling the studs out and helicoilng it - that's what I've done and they seem to have taken well. I wasn't sure if the heat would kill them but they seem to be better than the originals.

D

LRDiscoV8 · Jul 16, 2015

dominicbeesley said:
The manifold comes off easily. I'd remove the carb first and try and split the exhaust and inlet manifolds whilst its on the car as you can get a decent swing on it.

I'd try drilling the studs out and helicoilng it - that's what I've done and they seem to have taken well. I wasn't sure if the heat would kill them but they seem to be better than the originals.

D

I agree with the helicoiling idea, did it on my td5 and works a treat, just make sure you don't drill too far and keep the drill parallel to the other studs, simple way of doing that is lie a straight edge on the other studs and just keep the drill level with that... Good luck with it!

Rachel S

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