MVS Forums moderator Abscate shows us how to adjust the turbo wastegate, with photos:
Well, technically its a wastegate actuator (WGA) adjustment (for erik) 😀
Following the document in the VRD and using the IPD turbocharger tool:
You have to be careful to get the right pressure at the time of adjustment as the pressure slowly (over 10 minutes) creeps up from the correct 30 kPa (for my B5423T3 turbo -see chart for your engine)
The threads are a peculiar M6x 0.80 – a standard M6 1.00mm thread will not fit. I found my locknut was also too loose for a 10mm wrench and too big for a 9mm, no doubt from sitting on top of hot turbo for 17 years. A vice grip freed it up, with another vice grip firmly stopping the rod from turning.
Make sure you don’t let the rod turn AT ALL or else you will ruin the WGA.
I lubed both pieces with no-seize (grease, graphite mix from Permatex)
I found my actuator needed two turns to fit cleanly onto the turbo pin when closed. My split pin stuck rusted into the pin hole, so I wired it with copper wire until I have time to clean out the hole with a punch or drill.
Replace the screws (M8) onto the turbo cover if they are funky unless you like to hear the wish-wish-wish of the turbo dumping…
Motivation – I lost my daily race to the stop light to BMW boy this week. I found my WGA was unhooked so I was left with no boost and second place.
On Monday, the natural order of things will be restored:
Volvo First
BMW – First Loser
1999 V70 T5 Turbocharger wastegate adjustment
Last Updated on August 19, 2020
