V6 spark plugs - bit of a job!

[John Banks]

I thought Subarus were a pain in the neck with a flat four and having to remove half the gubbins on each side of the engine to get to the plugs!

However, my 69500 mile 406 V6 was a bit reluctant below 4000 RPM so I bought (2x4 pack : plugs. Front bank is easy under the engine cover and the coil packs lift off.

But to do the rear bank I had to remove the whole inlet manifold/plenum/throttle body!

Masterpiece of design there Peugeot. Are all V6s like this - I've never really looked.

Good news it that there is now a much smoother performance below 4000 RPM with no sudden wild cam feel at 4000 RPM, but much more torque below.

 

[Brian Kelleher]

Is it a difficult job, apart from being a pain in the arse ? I've thought about doing mine (spend a lot of time working on my racebike, so I'm pretty mechanical), but I'm curious how big a job it is.

Cheers,
Brian from Oz
98 406SV(E?) with a heap of kms

 

[John Banks]

Well I did the wife's Puma first and that took 15 minutes. This took 90 minutes. Not difficult, just rather cold doing it when the temperature was 3 degrees.

 

[John Banks]

If you are doing it I suggest getting a new inlet manifold gasket. Mine split in a few places and I ended up using sealant. It is not leaking, (not like it is under boost or anything ), and where it split and was adherent to the inlet manifold the other matching part was still adherent to the block.

 

[Brian Kelleher]

Thanks John, much appreciated.

Cheers,
Brian

If you are doing it I suggest getting a new inlet manifold gasket. Mine split in a few places and I ended up using sealant. It is not leaking, (not like it is under boost or anything ), and where it split and was adherent to the inlet manifold the other matching part was still adherent to the block.