QUESTION
What would be consequences of installing aluminium spacer at the wrong position?
I guess, it would affect the diaphragm "pre-load", possibly leading to damage at the maximum boost level (rod travel).
Heat damage may be the obvious one, of course.
Looks like things are screwed up little bit, here. Do you think majority of the people made this mistake?
The waste-gate at the first picture is my spare one which I bought at a swap meet this summer and I don't know much about its condition.
it looks like "somebody" assembled it wrong way and did not use the paper gasket. I bought it mainly for the diaphragm, just in case mine is defective.
My original waste-gate is on the vehicle, pictures 2 and 3.
I don't know it's condition either. Looks like PO have renewed the diaphragm.
Did he mess up, too?
If I have to rebuild my waste-gate, I'd like to perform "on car" surgery, like this guy: URL xxxxxxxxxxxxxxxxxx
C. G. - USA
ANSWER
With the aluminium spacer ring positioned incorrectly will certainly pre-load the diaphragm and affect the operation of the waste-gate.
With the diaphragm being pre-loaded and in direct contact with the hot waste-gate body will significantly reduce the service life of the component.
I have followed the URL link you provided and would not recommend rebuilding the waste-gate whilst still mounted on the exhaust manifold.
Taking an ill-considered approach to this task demonstrates a lack of understanding to achieve a lasting and quality result.
I understand the temptation to take a short-cut because the 10mm lock nuts are not easy to access.
However, leaving the waste-gate cast-iron body in situ will compromise a successful outcome and ignore the opportunity of inspecting the valve and manifold seat for wear.
Carrying out a diaphragm replacement in this way also increases the chances of the diaphragm and other components being misaligned whilst being re-assembled.
Rebuilding a waste-gate on the bench allows you to centralise the diaphragm and carry out final assembly without component misalignment.
It also provides an opportunity to test the waste-gate operation prior to installation.
From the photographs you have sent me of your Esprit waste-gate installation, it would appear this has been installed incorrectly.
Copyright © 2012 Lotus Marques
What would be consequences of installing aluminium spacer at the wrong position?
I guess, it would affect the diaphragm "pre-load", possibly leading to damage at the maximum boost level (rod travel).
Heat damage may be the obvious one, of course.
Looks like things are screwed up little bit, here. Do you think majority of the people made this mistake?
The waste-gate at the first picture is my spare one which I bought at a swap meet this summer and I don't know much about its condition.
it looks like "somebody" assembled it wrong way and did not use the paper gasket. I bought it mainly for the diaphragm, just in case mine is defective.
My original waste-gate is on the vehicle, pictures 2 and 3.
I don't know it's condition either. Looks like PO have renewed the diaphragm.
Did he mess up, too?
If I have to rebuild my waste-gate, I'd like to perform "on car" surgery, like this guy: URL xxxxxxxxxxxxxxxxxx
C. G. - USA
ANSWER
With the aluminium spacer ring positioned incorrectly will certainly pre-load the diaphragm and affect the operation of the waste-gate.
With the diaphragm being pre-loaded and in direct contact with the hot waste-gate body will significantly reduce the service life of the component.
I have followed the URL link you provided and would not recommend rebuilding the waste-gate whilst still mounted on the exhaust manifold.
Taking an ill-considered approach to this task demonstrates a lack of understanding to achieve a lasting and quality result.
I understand the temptation to take a short-cut because the 10mm lock nuts are not easy to access.
However, leaving the waste-gate cast-iron body in situ will compromise a successful outcome and ignore the opportunity of inspecting the valve and manifold seat for wear.
Carrying out a diaphragm replacement in this way also increases the chances of the diaphragm and other components being misaligned whilst being re-assembled.
Rebuilding a waste-gate on the bench allows you to centralise the diaphragm and carry out final assembly without component misalignment.
It also provides an opportunity to test the waste-gate operation prior to installation.
From the photographs you have sent me of your Esprit waste-gate installation, it would appear this has been installed incorrectly.
Copyright © 2012 Lotus Marques