Can anyone advise how to replace the WG boost spring. I am interested in fitting a 1 bar spring to my standard Waste gate.
Is there any pit falls when opening up the assembly?
if anyone has a step by step procedure it would be appreciated.

Thanks
TIM

 

Definitely gotta be careful; that spring's under a lot of tension and will become a missle flying across the room.
Best to find a way to clamp the whole body to hold the top in place while you loosen and remove the fasteners which hold the top on...then slowly release the tension. People have used C-clamps, pipe clamps, a huge vise, wedged the entire unit in a lathe, etc. What I have used is my drill press with the table dropped down far enough to wedge the WG between the table and the chuck. Then, drop the chuck down until it contacts the top of the WG and lock it in place. Remove the fasteners and slowly raise the chuck until all the tension is gone from the spring.
Be creative, but don't go removing the fasteners without something to hold it all together first.

 

to be honest i just sat on top of mine and did about half a turn on each fastener one at a time until they were all the way undone.. its not as hard as it sounds and wont go flying across the room as long as your on top of it.. the hard part though will be to get it back together. and in my case i put a 1.2 bar spring in it and a spacer.. lemme tell you it was mission impossible until my neighbor came over and sat on it for me.

 

I don't know Chris...sounds like **** impaction is a strong possibility with your approach. You're right, getting it back together would be a real challenge.

 

Thanks for the feedback. Did you guys have any damage to the diapthram? Any other replacements parts required?

 

ha it was scary at first but its not really as bad as you would think. as long as you losen each bolt little by little when it finally pops you just feel it come up a little.. i didnt actually "sit on it" but just put alot of my body weight on top of it.

 

No, no damage. I took mine apart to diagnose a leak that turned out to be a worn valve guide and a high-temperature gasket between the upper and lower body sections. Never repaired it, went with a Tial instead.

There are a couple of people that have had new guides made at a local machine shop, but outside of diaphrams I don't know of anyone marketing rebuild kits for these.

 

Thanks Mark, i suppose i will have to open it up and have a look.
Cheers

TIM