[Mavus]

This is one of those items that you hope it never breaks but you kinda know it might with a catastrophic result. If it is preventable and affordable it's a no brainer.

[TheSt|G]

Originally Posted by Smooth 330i

This is one of those items that you hope it never breaks but you kinda know it might with a catastrophic result. If it is preventable and affordable it's a no brainer.

Judging by their other products, I doubt it will break the bank.

[DickBlisken]

While we're on the subject, is there a substantial difference between the orange-gasketed DISA actuators and the green-gasketed ones?

Edit: In terms of build quality.

[SDemetris]

Originally Posted by Nico87

While we're on the subject, is there a substantial difference between the orange-gasketed DISA actuators and the green-gasketed ones?

Edit: In terms of build quality.

This seems like the perfect time to start an internet rumor haha. "Green DISAs of death" sounds good... but actually I doubt it.

[TheSt|G]

Originally Posted by Nico87

While we're on the subject, is there a substantial difference between the orange-gasketed DISA actuators and the green-gasketed ones?

Edit: In terms of build quality.

This is entirely a guess, but I think the orange ones are older. Basing this on M54 gaskets being orange.

[DickBlisken]

Originally Posted by TheSt|G

This is entirely a guess, but I think the orange ones are older. Basing this on M54 gaskets being orange.

The orange ones are definitely older, I'm wondering if BMW has improved the design at all to mitigate the possibility of failure.

[TheSt|G]

Originally Posted by Nico87

The orange ones are definitely older, I'm wondering if BMW has improved the design at all to mitigate the possibility of failure.

It's possible but too early to say. This is also compounded by the fact that most of the people retrofitting DISA manifolds are sourcing them off older crashed cars.

[DickBlisken]

Originally Posted by TheSt|G

This is also compounded by the fact that most of the people retrofitting DISA manifolds are sourcing them off older crashed cars.

Yeah that's always a concern. I sourced mine from an auto recycler in Detroit. It arrived in excellent shape (minus a bit of dust), and both valves are very tight. Without exerting too much force, I tried moving them, to no avail.

I'm confident that they're not going to fail, but a permanent-ish solution, such as an upgrade kit, would be nice.

[Johnny D]

I mentioned this a while back and people argued with me about it. Plastic or metal, anything that can break and lodge into the valvetrain needs to be inspected and replaced regularly.

[DickBlisken]

Originally Posted by Johnny D

I mentioned this a while back and people argued with me about it. Plastic or metal, anything that can break and lodge into the valvetrain needs to be inspected and replaced regularly.

If I had to choose, I'd much rather have a piece of plastic stuck in my valvetrain than metal.

[Judge Dredd]

Do I have to worry about this since I have the three-stage manifold on my 330i?

Not really familiar with the part so excuse my ignorance.

[RazRokz.!]

Originally Posted by Judge Dredd

Do I have to worry about this since I have the three-stage manifold on my 330i?

Not really familiar with the part so excuse my ignorance.

You do. The problem is with the adjuster unit flaps on your manifold breaking.

[Judge Dredd]

Originally Posted by RazRokz.!

You do. The problem is with the adjuster unit flaps on your manifold breaking.

Sheeeeeeit. Well thanks for the heads-up. I'll replace this soon and keep the old one just in case if it isn't destroyed.

[Tim603]

Originally Posted by Nico87

If I had to choose, I'd much rather have a piece of plastic stuck in my valvetrain than metal.

Im kinda thinking the same as you, since the guy who had the problem that started this whole thing didnt have any damage caused, just needed to remove the piece

[DickBlisken]

Originally Posted by Tim603

Im kinda thinking the same as you, since the guy who had the problem that started this whole thing didnt have any damage caused, just needed to remove the piece

Neither one is a good situation, obviously. That being said, plastic really is the lesser of the two evils.

This thread actually inspired me to take the DISA units off of my soon-to-be-installed intake manifold and thoroughly inspect them (again, haha). Both valves are wicked tight, and there are no signs of chipping or cracking in the plastic.

Looking forward to the installation this Sunday!

[tigermack]

So this is one of the intake flaps for the manifold... can it be replaced without taking the manifold off?

[DickBlisken]

Originally Posted by tigermack

So this is one of the intake flaps for the manifold... can it be replaced without taking the manifold off?

The large DISA actuator could be replaced without removing the manifold. The small one, however, would require you to remove the manifold in order to access it.

[TheSt|G]

Originally Posted by Tim603

Im kinda thinking the same as you, since the guy who had the problem that started this whole thing didnt have any damage caused, just needed to remove the piece

As far as I know, and I keep a pretty close ear to the ground on such things, there have been no known DISA failures on the M54 after upgrading to the German Auto Solutions DISA flap. Furthermore, I doubt the flap, if unbroken like a metal one would be, is going to be able to fit down the runner into the engine.

[Tim603]

Originally Posted by TheSt|G

As far as I know, and I keep a pretty close ear to the ground on such things, there have been no known DISA failures on the M54 after upgrading to the German Auto Solutions DISA flap. Furthermore, I doubt the flap, if unbroken like a metal one would be, is going to be able to fit down the runner into the engine.

True makes sense

[mmurray]

Jumping in late one this one - read through the thread, but still unclear - is this a common failure? Sounds like it was an M52/4 issue but just an N52 issue in theory (besides the one guy's run-in with plastic bits)

[DickBlisken]

Originally Posted by mmurray

Jumping in late one this one - read through the thread, but still unclear - is this a common failure? Sounds like it was an M52/4 issue but just an N52 issue in theory (besides the one guy's run-in with plastic bits)

That's the vibe I'm getting as well.

[tigermack]

Originally Posted by Nico87

The large DISA actuator could be replaced without removing the manifold. The small one, however, would require you to remove the manifold in order to access it.

In other words, as long as it's still in one piece then it should be fine to remove without having to remove the manifold... thanks!