Wastegate Arm Tightening?

Gareth83 · Jun 3rd, 2009, 13:29

Quote:

Originally Posted by t4 paul

1. got an annoying rattle when you lift off the accelerator, had a look round and most likely thing is the wastegate arm, is this easy to tighten up cant seem to find it in my haynes book.

Quote:

Originally Posted by Rooster

1, yeah sounds like wastegate arm to me chattering when you lift off throttle, yeah it can be tighten up abit to stop it, altho not to much,

Quote:

Originally Posted by Andy P

1. Sounds like the wastegate arm to me - quite a common problem. Just lean over the back of the engine, take off the top heatshield and you will see the wastegate. Slacken the lock nut on the arm, pull out the split pin, pop off the arm. Now twist the end of arm clockwise to tighten - go one thread at a time. Reverse the instructions. Oh, its a good idea to let the turbo cool down before you touch it!

I have the said problem, will tightening the arm actually stop the rattling or just up the boost?

I have found the following as a good guide:
http://s40concepts.net/forum/index.p...8600f44828f309

but don't want to mess around with the boost...

help

Baffler · Jun 3rd, 2009, 14:59

Try half a revolution...should be enough to get rid of the rattle. Also try not to move the shaft too much when lifting as there's a chance of damaging the actuator diaphram.

I suppose it would be no harm to have the boost measured if you can lay your hands on a guage.

Gareth83 · Jun 3rd, 2009, 16:24

I have no experience with fettling with turbo cars

Naturally aspirated for the win

Any tips on measuring boost?

Enigma666 · Jun 3rd, 2009, 18:34

You may find that it is just the pin has snapped also...this can cause the same rattle when lifting off

Gareth83 · Jun 4th, 2009, 00:00

The retaining pin?

That hasn't snapped, it's just loose

Baffler · Jun 4th, 2009, 00:26

The rattle is the wastegate vibrating/chattering due to wear and by tightening the actuator arm you are taking up the slack. As above, just half a turn (clockwise) should be sufficient and be sure to hold the actuator arm with a mole/vice grips.

Enigma666 · Jun 4th, 2009, 09:20

Quote:

Originally Posted by Gareth83

The retaining pin?

That hasn't snapped, it's just loose

A loose D-pin?
Not entirely sure how you can have a loose d-pin....it slots into the linkage and pins the 2 halves...I suppose it might be damaged....either way try what baffler says

Gareth83 · Jun 4th, 2009, 12:04

I thought I'd run into trouble doing this as the nut looked pretty rusty.

Nothing a bit of trusty WD40 couldn't sort, soaked it last night and undone it this morning.

One full turn clockwise and the rattling has now stopped. Wish I knew about this fix a while back! I always thought it was a loose heat shield or something.

Took it for a quick spin and not sure if it was the placebo effect or the fact that I've been driving round in a 1.2 Clio but I have no idea why I am selling the said car. Performance is phenomenal with safety to boot!

Enigma666 · Jun 4th, 2009, 12:07

lol welcome back to owning a fully working turbo car

Glad you got it sorted

Gareth83 · Jun 4th, 2009, 12:24

Quote:

Originally Posted by Enigma666

lol welcome back to owning a fully working turbo car

Glad you got it sorted

save for my ABS problem

I still like my NA cars though, I love the way my mk1 16v just revs and revs and revs

Jun 3rd, 2009, 14:59	#2
Baffler Premier Member Last Online: Yesterday 15:43 Join Date: Dec 2002 Location: Co. Limerick, Ireland	Try half a revolution...should be enough to get rid of the rattle. Also try not to move the shaft too much when lifting as there's a chance of damaging the actuator diaphram. I suppose it would be no harm to have the boost measured if you can lay your hands on a guage. __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.

Jun 4th, 2009, 00:26	#6
Baffler Premier Member Last Online: Yesterday 15:43 Join Date: Dec 2002 Location: Co. Limerick, Ireland	The rattle is the wastegate vibrating/chattering due to wear and by tightening the actuator arm you are taking up the slack. As above, just half a turn (clockwise) should be sufficient and be sure to hold the actuator arm with a mole/vice grips. __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.

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Jun 3rd, 2009, 16:24	#3
Gareth83 Senior Member Last Online: Jan 11th, 2013 22:01 Join Date: Dec 2008 Location: Cardiff	I have no experience with fettling with turbo cars Naturally aspirated for the win Any tips on measuring boost?

Jun 3rd, 2009, 18:34	#4
Enigma666 Master Member Last Online: Apr 16th, 2021 11:32 Join Date: Aug 2006 Location: Chester	You may find that it is just the pin has snapped also...this can cause the same rattle when lifting off

Jun 4th, 2009, 00:00	#5
Gareth83 Senior Member Last Online: Jan 11th, 2013 22:01 Join Date: Dec 2008 Location: Cardiff	The retaining pin? That hasn't snapped, it's just loose

Jun 4th, 2009, 12:04	#8
Gareth83 Senior Member Last Online: Jan 11th, 2013 22:01 Join Date: Dec 2008 Location: Cardiff	I thought I'd run into trouble doing this as the nut looked pretty rusty. Nothing a bit of trusty WD40 couldn't sort, soaked it last night and undone it this morning. One full turn clockwise and the rattling has now stopped. Wish I knew about this fix a while back! I always thought it was a loose heat shield or something. Took it for a quick spin and not sure if it was the placebo effect or the fact that I've been driving round in a 1.2 Clio but I have no idea why I am selling the said car. Performance is phenomenal with safety to boot!

Jun 4th, 2009, 12:07	#9
Enigma666 Master Member Last Online: Apr 16th, 2021 11:32 Join Date: Aug 2006 Location: Chester	lol welcome back to owning a fully working turbo car Glad you got it sorted

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