Is a decat on a Z4M an option?

[Ed Doe]

Ft.

(****in tight!)

But seriously bit of common sense on the back of a 1/2" ratchet should be fine

[jontZ4M]

Will do!

[Vanne]

I'm not getting into a dick waving contest over who's spent what on their cars but I'm fairly sure I've had the bigger end of the engine bills from an s54, I'm perfectly aware of and prepared for the cost of ownership.

Not me sadly, my wife will cut my balls off if I spend too much on car that never gets used. I'll find a way of making it affordable.

So would mine, If I didn't remind her every now and then that instead of car stuff, I could be at the pub every night pissing it up the wall instead.. Like so many guys I know do..

No thanks...

Gotta have something you like doing, your only here once..

[jontZ4M]

So would mine, If I didn't remind her every now and then that instead of car stuff, I could be at the pub every night pissing it up the wall instead.. Like so many guys I know do..

No thanks...

Gotta have something you like doing, your only here once..

Yup agreed.

General update:
- cat section refurbed and waiting to go back on(think I'll link it to the rest of the exhaust and then heave it all onto the car in one piece).
- bought an aftermarket used cat-back from a nice chap in London today. Already stripped it down, cleaned it up and just making it nice again.
- on Monday I'm sending the X-pipe from the new system off to another nice chap on the forum for modification.

When that comes back I'll put it all back on car and I THINK that's me done for the year!

[TomK]

The question I have is: how tight do we do those four bolts that join the headers to the cat section please? Can't find it in any of the diagrams (surprise surprise)

2AZ Exhaust manifold to exhaust system
S54 M10 15±2 Nm

You need to get yourself a copy of TIS...

[jontZ4M]

2AZ Exhaust manifold to exhaust system
S54 M10 15±2 Nm

You need to get yourself a copy of TIS...

Thanks Tom but is that a typo? The M10s on the driveshafts for instance are 100Nm. 15Nm seems too low by a huge factor?

[TomK]

I don't think so, TIS is rarely wrong. The correct M10 hex nut is copper there which would probably explain it?

[jontZ4M]

I don't think so, TIS is rarely wrong. The correct M10 hex nut is copper there which would probably explain it?

Will investigate further. I'm glad you responded as I would have tightened the hell out of these.

[jontZ4M]

In case anyone interested, this is what turned out to be inside the resonator in the middle of the X-pipe of our exhausts. Un-silencing mine.

[Mikey_Boy]

2AZ Exhaust manifold to exhaust system
S54 M10 15±2 Nm

You need to get yourself a copy of TIS...

Thanks Tom but is that a typo? The M10s on the driveshafts for instance are 100Nm. 15Nm seems too low by a huge factor?

The low torque value is because of the expansion of the joint and fixtures due to heat - too tight and it will fail. 15Nm ensures it is just snug when at room temperature.

[zmaster007]

In case anyone interested, this is what turned out to be inside the resonator in the middle of the X-pipe of our exhausts. Un-silencing mine.

Would be interested to know how it sounds

[jontZ4M]

The low torque value is because of the expansion of the joint and fixtures due to heat - too tight and it will fail. 15Nm ensures it is just snug when at room temperature.

Amazing - that post needs a thread of its own to prevent people over-tightening them.