Turbosmart dual port kompact BOV - known issues?h

[TrickSTer]

Look at the Maintenance section.......

http://www.turbosmart.com.au/wp-content/uploads/2013/10/TS-0203-1061-KT-DP-SHORTIE.pdf

The o-ring sizes are listed on the TS doc referenced.

 

[mercdank]

Thanks!

 

[JPGC]

Here are the maintenance kits directly from Turbosmart.

 

[Sekred]

I would say the plumb back is a good option, it's easier to set up (i.e it doesnt need any setting up at all!) and the recirc noise through the induction sounds just as good IMO.

I've checked over the valve again, and it has been fitted for 6 months, mileage is not mentioned by TS when it comes to servicing the valve. In that time, I have covered 6000 miles.

The piston has been removed, it is of brass construction and one assumes that its machined to match the internal bore of the housing, which is black anodised throughout. This tight interference fit allows it to seal. Spring length has been checked and meets the correct 72mm.

There is plenty of scuffing to the piston wall all around the circumference, which is cause for concern, and another area that could be preventing it from holding boost. Because it also vents to atmosphere, any 'blow by' of pressure around the valve will go straight out the port, and its feasible we have been losing pressure here, as well as the main O- ring on the body.

I will say what Turbosmart have to say about it. I've been more than happy with the valve noise and performance but over time, wear and tear does seem to have taken it's toll.



View attachment 8220

Its a little unusual to find a problem with TS products, there are expensive but I have always found the quality very good.
The BOV piston seals on the O ring not the surfaces of the piston and bore. Spring pressure plus the Boost pressure holds the piston closed, making leakage under boost unlikely unless something is damaged.

 

[Kidders]

Its a little unusual to find a problem with TS products, there are expensive but I have always found the quality very good.
The BOV piston seals on the O ring not the surfaces of the piston and bore. Spring pressure plus the Boost pressure holds the piston closed, making leakage under boost unlikely unless something is damaged.

Under pressure testing it definitely leaks between the body and the piston , out of the recirc port when pressurised. I've even done a video to show what I mean. You are right it has a o ring on the compressor side of the valve where it sits inside the recirc oroficie but it's leaking on the opposite side to that, where the boost pressure line/vac hose is.

 

[Sekred]

Under pressure testing it definitely leaks between the body and the piston , out of the recirc port when pressurised. I've even done a video to show what I mean. You are right it has a o ring on the compressor side of the valve where it sits inside the recirc oroficie but it's leaking on the opposite side to that, where the boost pressure line/vac hose is.

Have you got a link to your video?
Thanks

 

[Kidders]

Not the most scientific of test rigs, just compressed air blowing in to the top of the valve. I had used a very light machine oil on the piston to see if this helped with sealing but as you can hear, air is readily leaking past the piston and out the 'atmospheric' side of the port.

I've had no response from Turbosmart either.

The design of the plumb back is much better as it wont suffer from this leakage even if the piston wears.

https://www.youtube.com/watch?v=VgCVKxkwumo

 

[Sekred]

Not the most scientific of test rigs, just compressed air blowing in to the top of the valve. I had used a very light machine oil on the piston to see if this helped with sealing but as you can hear, air is readily leaking past the piston and out the 'atmospheric' side of the port.

I've had no response from Turbosmart either.

The design of the plumb back is much better as it wont suffer from this leakage even if the piston wears.

https://www.youtube.com/watch?v=VgCVKxkwumo

Ok, now I can see where its leaking. Looks like a design problem if its relying on just the piston in its bore to seal.

 

[mercdank]

Ok so for whatever reason I have an allen head bolt instead of a regular m6 bolt holding my bov in place. I tried taking them off but wet could only get two off. The car was on ramps and it was very tight I need to get on a lift.

Does anyone know the length of the bolt? I'm gonna get m6 bolts at the hardware store.