Carlo_Carrera

Anyone know anything about these?

JG 996T

Secondary air system - do a search on this forum - I had them it was a cracked valve

Carlo_Carrera

The search wasn't working earlier today, now it is, thanks.

Kevinmacd

Bad divertor valves, had the same issue.

wross996tt

P0410/1411 Bank 1 & 2 below limit
Possible fault cause
♦ Secondary air injection pump is not triggered
♦ Secondary air injection pump does not work
♦ Air supply lines restricted
♦ Electric change-over valve does not function
♦ Air change-over valve does not function
♦ Vacuum system leaking

Kevinmacd

iIf you look at the secondary air injection system you will see the divertor valves are part of the circuit. The 996tt stock divertor Bosch valves are known to fail.

Carlo_Carrera

Thanks, do you happen to have a part number of replacements?

JG 996T

Get the Bosch 710N (after you've confirmed that DV is the source of the leak).

Kevinmacd

I replaced mine with a set of Champion motorsports. They were highly recommended. But do verify before changing out!

Carlo_Carrera

Thanks.

Carlo_Carrera

I will, thanks.

Kevin

Carlo, my advice is to install the new Bosch 710N bypass valves. They are reinforced and can withstand the abuse.

Kevinmacd

Orbit racing who runs in the 24hrs of Daytona, and sponsored by Petrone recommedned the Champions seem to be well built and hold up well. Orbit is very well known down here and does impeccible Porsche only repairs and retrofits, rebuilds etc..
But to each their own, mine have been in the car for more then a year and working fine!

Kevin

24 hrs of Daytona vs everyday driving??? Those engine come apart.. The Audi Motorsports Bosch 710N have been tested at 1.5bars. The new Kaiser built valves are the replacement. The aftermarket aluminum valves leak over time. You have to tear them apart and clean them. I have not lost a 710N valve in 3.5 years and neither have any of my customers..

The 710N will cycle the bypass air charge quicker than a mechanical piston or sleeve. That means that you are back on boost quicker, and sooner.

Kevinmacd

That wasnt my point , my point was this shop has an indepth knowledge of just about every Porsche and has an impecible reputation.