Can any of you VW diesel veterans tell me the differences between the Injection Pump on a manual trans VW diesel and an auto trans VW diesel?

If not, could any of you suggest a good VW diesel forum? Thanks! YOu guys are the best!






Kevin

tdiclub.com---have forums on turbo, non-turbo vws ect. great forum.

http://www.vwdiesel.net/phpBB/viewforum.php?f=6

vwdieselparts.com

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1983 300 SD 149k

1983 300 D 280k

1980 vw rabbit 1.5 na

1965 356C

I do not know when they started it as rabbit is pretty early. The reason for the belt change frequency being shorter on earlier tdi automatic models is the pump is operating at greater pressure. Suspect the really earlier automatics may not have had that feature as thought belt change interval was the same. I would be tempted to find a senior mechanic at a volks dealer and ask him. Was not aware rabbit diesel automatics were made come to think of it.

Yeah, they made 'em. They just crawl out into traffic and it's downright creepy! I bought one the other day to tinker on. The pump is advanced as far as it will go. I just don't think it should be that way. If I set it back to it's standard factory setting then the car won't start and IF it does it runs terribly. The pump must have some major wear in it. I have another off of an '82 with a manual trans and was trying to see if they would interchange. They sure do look the same but who knows what's inside.

This car even has power steering! It's a rare bird...around here anyway.

Kevin

Drove a 84 jetta diesel automatic for a few days once and was not too bad for power. Or should say better than expected. Since you have the other pump why not try it. Even if internal pressure a little lower by intent still should be pretty close.

The VW Parts catalog shows two different part numbers for the diesel rabbit injection pump:

068 130 107 AF labeled as injection pump - automatic
068 130 107 AG labeled as injection pump

I would take that to mean that the pumps are, in fact, different as is the case with the TDIs. Somebody on one of the previously mentioned boards should know for sure, though.

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1987 300D Turbo
2000 VW Golf TDI
2008 E320 Bluetec

Swap in a stick..


I bet you could use the pumps interchangably, even though there not correct.

Also, checked the belt timing? Sounds like an odd wear occurence..

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K

Since it is established that there are two different pumps I suspect now it is a large difference in output pressure. That may be causing you to move your present pump timing ahead if someone already put a manual pump on. The injector pop pressure is higher perhaps for the automatic. So if you do put the other pump on you may have to reset the pop pressure on your present injectors or locate a good used set off a manual model. May also loose some power though by doing that.(changing from the automatic setup to the manual setup) Perhaps too hard to find an automatic pump for back then so your choices may be limited. If installed pump has manual part number I think I would swap injecters first before changing pump. Can you see the part number on the pump in car to find out? Someone has taken the effort and nicely posted the pump numbers and that should help you.

and he told me that automatic and manual pumps are interchangeable on an '81. He said later on in production the pumps were different. It's kinda like the VW head bolts. Those were changed from 10mm hex type to a 12mm multipoint type "gradually" during 1981 according to the Bentley service manual.

Switching pumps is worth a shot. If I have the same symptoms then I will know that the pump is not the culprit. If I had the dial gauge and adapter for the IP then I could do a much better job of finding the "sweet spot". Just going by feel right now...have to...not much choice.

Kevin

i had an diesel '89 jetta 5 spd for a SHORT while, my junior year of high school. after i got it looking/sounding almost perfect, inside and out, some kid rear-ended me with his ghetto 70-something nova that was falling apart. on the first day of school, too...on the way home from school. needless to say, it totalled my car..the sunroof wouldn't even close. a year later, i saw that same kid. he was an employee at a go-kart track. go figure.

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1985 300D Turbo "Eunis"

Oilslick,
Why not ask a pump shop what the difference is and maybe they can make the change easily? Usually doesn't cost much to have them just take a look at it. RT

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When all else fails, vote from the rooftops!
84' Mercedes Benz 300D Anthracite/black, 171K
03' Volkswagen Jetta TDI blue/black, 93K
93' Chevrolet C2500HD ExCab 6.5TD, Two-tone blue, 252K

You are slowly getting all your information. One last bit is to find out if rabbit your era had same injector part # for automatic and manual transmissions. With that information you should be able to tie everything down. Still kind of suspect your advancing the pump indicates a higher pop pressure your injectors but just trying to help. Knowing that may be wrong but thinking to turn over every stone. Mechanic is probably right though. What concerns me also is each injectioin pump part number indicates one is for automatic and one for standard.

You have raised a very interesting point and I am checking with a diesel injection shop today to find out.

I don't know the history of the car. It is possible that someone has replaced the pump with a manual version, or possibly replaced the engine at some point. This could have been a manual car from the factory and they replaced the transmission with an automatic...who knows? I guess I could find out from the VIN but I don't know how to go about that. Carfax won't go back to '81 as far as I know so... what to do, what to do?

Someone suggested that I drop a manual tranny in it but that would defeat my purpose. I bought it because of the automatic trans and the powersteering...you just don't find those around and after driving this one up the road I now know why there aren't too many of these around. I thought my old '82 240D was slow but it was like a rocket ship compared to this thing.

Thanks for all your help.

Kevin