hiho
29-07-2006, 01:58 PM
I had some spare time this morning, and a spare injector pump and as my car is leaking fuel, i decided to investigate seal replacement.
Firstly, clean the pump thoroughly, I assumed that my pump was as corroded inside as out so i didnt bother cleaning it. Big Mistake. Internally the pump was spotless, now it needs a complete rebuild as bits of dust, corrosion and other crud entered the pump.
http://www.vwwatercooled.com.au/forums/images/imported/2006/07/IMG_0751small-1.jpg
To remove the top cover, remove the accelerator lever from the accelerator shaft, noting its alignment on the splined shaft. Undo the four cover screws, tap the cover to break the seal, push the accelerator shaft out of the cover as you lift it off. This gives you access to the accelerator shaft seal, which is an o-ring type.
http://www.vwwatercooled.com.au/forums/images/imported/2006/07/IMG_0754small-1.jpg
Its dimensions are roughly 11mm od, 7mm id and 2mm thick.
Next i attacked the cold start shaft seal.
http://www.vwwatercooled.com.au/forums/images/imported/2006/07/IMG_0755small-1.jpg
Simply remove the lever arm (noting its position on the shaft), two cover screws, remove the cover and shaft, press the shaft out of the cover and there is the seal, another o-ring of the same dimensions as the accelerator shaft seal.
http://www.vwwatercooled.com.au/forums/images/imported/2006/07/IMG_0756small-1.jpg
This is the cold start shaft cover seal, another o-ring. This seal doesnt have contact with moving parts and probably wont be leaking, however, its dimensions are 32mm od, 26mm id and 3mm thick.
I have not yet disassembled the pump to acces the input shaft seal (bit daunting). Has anyone had to replace this seal before?
All of these seals should be available in Viton or equivelant ULSD tolerant compound.
Any comments are welcome. Also if anyone wants detailed photos of the internals of the pump before they attempt any repairs on their own pump, I am happy to use mine for this educational purpose.
Matt
Firstly, clean the pump thoroughly, I assumed that my pump was as corroded inside as out so i didnt bother cleaning it. Big Mistake. Internally the pump was spotless, now it needs a complete rebuild as bits of dust, corrosion and other crud entered the pump.
http://www.vwwatercooled.com.au/forums/images/imported/2006/07/IMG_0751small-1.jpg
To remove the top cover, remove the accelerator lever from the accelerator shaft, noting its alignment on the splined shaft. Undo the four cover screws, tap the cover to break the seal, push the accelerator shaft out of the cover as you lift it off. This gives you access to the accelerator shaft seal, which is an o-ring type.
http://www.vwwatercooled.com.au/forums/images/imported/2006/07/IMG_0754small-1.jpg
Its dimensions are roughly 11mm od, 7mm id and 2mm thick.
Next i attacked the cold start shaft seal.
http://www.vwwatercooled.com.au/forums/images/imported/2006/07/IMG_0755small-1.jpg
Simply remove the lever arm (noting its position on the shaft), two cover screws, remove the cover and shaft, press the shaft out of the cover and there is the seal, another o-ring of the same dimensions as the accelerator shaft seal.
http://www.vwwatercooled.com.au/forums/images/imported/2006/07/IMG_0756small-1.jpg
This is the cold start shaft cover seal, another o-ring. This seal doesnt have contact with moving parts and probably wont be leaking, however, its dimensions are 32mm od, 26mm id and 3mm thick.
I have not yet disassembled the pump to acces the input shaft seal (bit daunting). Has anyone had to replace this seal before?
All of these seals should be available in Viton or equivelant ULSD tolerant compound.
Any comments are welcome. Also if anyone wants detailed photos of the internals of the pump before they attempt any repairs on their own pump, I am happy to use mine for this educational purpose.
Matt