XJ XJ6 / XJ8 / XJR ( X350 & X358 ) 2003 - 2009

Air intake plenum parts kit

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Old Oct 8, 2025 | 09:26 AM
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From: Thomas Jefferson's Poplar Forest
Default Air intake plenum parts kit

Hi, folks. I need some further guidance on the removal of the throttle body and all that entails. I understand there is a kit for replacement gaskets and the like.

I am removing the throttle body/air intake due to a leaking hose directly beneath the butterfly. At 15 PSI it drips continuously and I want to get into this as soon as I can. Besides the hose (which I have not identified), I've been advised by one of our moderators to seek out the kit of all/many of the replaceable parts needed.

Thanks in advance for any positive feedback.

rr41
 

Last edited by redrover41; Oct 8, 2025 at 09:28 AM.
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Old Oct 8, 2025 | 12:30 PM
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Originally Posted by redrover41
Hi, folks. I need some further guidance on the removal of the throttle body and all that entails. I understand there is a kit for replacement gaskets and the like.

I am removing the throttle body/air intake due to a leaking hose directly beneath the butterfly. At 15 PSI it drips continuously and I want to get into this as soon as I can. Besides the hose (which I have not identified), I've been advised by one of our moderators to seek out the kit of all/many of the replaceable parts needed.

Thanks in advance for any positive feedback.

rr41
Suggest you grab a full set for the INTAKE manifold as well. Getting 'due' on age-basis even if not yet leaking.
You may need to remove it whilst chasing the perished hoses ..... and related plumbing.

In general, NEW parts for cars already 'old enough to vote' will become scarcer and more dear, not more plentiful and cheaper.

As this forum gives us fair warning as to what fails, and at what age or mileage, I have been trying to stock 'spares' for my 2005 'in advance of need'. It has been paying-off niceley in saved downtime, hassle, and even costs.
 

Last edited by Thermite; Oct 8, 2025 at 01:18 PM.
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Old Oct 9, 2025 | 10:23 AM
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From: Thomas Jefferson's Poplar Forest
Default Good advice

Thanks. I'm buying what I can, when I can. Relying on third party components is a dubious errand.

rr41
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Old Oct 9, 2025 | 08:32 PM
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Originally Posted by redrover41
Relying on third party components is a dubious errand.

rr41
--
Meahh.. Also unavoidable.

If it can be glued, TiG'ed, turned, milled, drilled, or some combination of the above, we can fab it - NEW.. But mostly at too high a cost in time, waste, and 'learning curve'.

Harder yet to do plastic moulded parts, cast metals, molded plastic sheet goods, or aluminuim or steel stampings?

Salvage yards have to eat, too, but .... on age-fail parts, such as plastic cooling system plumbing, I'm taking the approach that inferior Chynese-parts - some of them found from experience to have not even been molded in the same GRADE of plastic as OEM, (f****rs MELTED!) will too serve if they must do.

To be fair, if only we knew WHICH Chinese firm, some of them are as good as OEM ..or even BETTER-THAN, given Ford/JLR production decisions were made more often by lean-mean spring-loaded-penurious bean-counters, than by longevity-and-reliability loving Engineers.

They just need to be purchased as double or triple the need, inspected OFTEN, then swapped-out at rather shorter intervals than OEM.

Ex: Both V6 and V8 AJ 5.0 can get all-metal REAR manifolds as an aftermarket improvement over OEM plastic.

Supercharged owners can also get metal FRONT piping, NA versions still has no metal option at the front.

To the good, the front pipe on a NA 5.0 can be replaced in 20 or 30 minutes as there is minimal involvement of other parts.

So we stock TWO spares. One at home shop. One in the boot, spare tire well, underseat - somewhere it is always with the vehicle.

Not a big deal. The OEM lasted over 8 years. I change the Chinese ones annually now.

If ever there was built a "perfect" motorcar?

God kept it for her own use.



 

Last edited by Thermite; Oct 9, 2025 at 08:59 PM.
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