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ESP T3 Engine Assembly Diagram & Guide

 
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corrivr6



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Post24-10-2017, 22:07    Subject: ESP T3 Engine Assembly Diagram & Guide Quote

Hello.

I'm a hobbyist who likes to tinker with things, just like everyone else here, I'm sure.
My neighbor asked me to help him with his VW T3 that has a naturally aspirated KY engine.
to seal the Bosch fuel injection pump installed there.
His problem was that the ESP was...
The sealing O-ring on the high-pressure side was leaking.
We diligently assembled the ESP and then stood it upright.
with the wave pointing downwards onto the table, rotating it so that the upward-pointing part is now facing upwards.
Separate the HD part from the basic pump.
Since this isn't quite as straightforward as it seems, because...
However, while doing so, various internal components may come loose or break apart.
That's exactly what happened to us, and because everything was loose, I had...
Suddenly, there was a mess in front of me.

Most of it seems plausible and makes sense in how it all comes together.
However, with the exception of two parts.

Part 1 is a small feather; I can only guess what it means.
where it comes from.
Could it be that these are centered?
below the eccentric disc, there is...?
There's a crossbar where they are.
Did you hear what I said? / Are you listening?


I have to say that the parts are disassembled up to the level of the bearing ring.


Part 2 is a very small disc, approximately 7mm in diameter.
I would assume that these are located above the eccentric plate.
to be filled.
This small disc actually fits perfectly into the...
Area where the large feathers are inserted.

Does anyone happen to have an exploded view diagram?
Can you understand how this pump works?

Perhaps a few photos as well?

Best regards, Ralf.


Translated on 15-08-2026, 22:26.
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Herbert
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Post24-10-2017, 22:24    Subject: ESP T3 Engine Assembly Diagram & Guide Quote

Please search for "Bosch distributor injection pump."
Example https://www.autoteilemann.de/p/129375/bosch-teilesatz-reparatursatz-einspritzpumpe-1-467-010-467/?gclid=EAIaIQobChMI6svRmIuK1wIVpwrTCh2WoA73EAQYASABEgJyCfD_BwE
hg
Herbert.
Horch A4 8K CJCD
Golf 7 DDYA
(+ Audi 80 Avant B4 1Z 475Tkm - habe ich vom ersten bis zum letzten Tag gerne gefahren)
(+ Passat Variant 32B CY 400Tkm)


Translated on 15-08-2026, 22:30.
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Gremlin
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Post25-10-2017, 4:47    Subject: ESP T3 Engine Assembly Diagram & Guide Quote

Why go far away? icon_wink.gif

I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

But it is correct:
- In one of the connectors located beneath the hub disc, a spring is centrally positioned.
-Between the pump piston and the valve plate, there is a small shim.

EDIT:

Note, attention!!

Unfortunately, you can also install the impeller upside down, rotated by 180 degrees!
The pin that drives the pump piston is aligned with the keyway on the shaft where the pulley sits.

-No warranty-
It's been a few years now since I took apart something like that icon_twisted.gif.


Translated on 15-08-2026, 22:32.
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corrivr6



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Post25-10-2017, 7:45    Subject: ESP T3 Engine Assembly Diagram & Guide Quote

Great! You are simply fantastic. icon_smile.gif

I see it in the exploded view diagram.
from the link that the distance is measured in discs.
Let the four roles be expressed outwardly.
I believe that the...
the pump that we opened.
it was on the inside. Or is that recent?
Does it matter if they come from the outside or the inside?


Translated on 15-08-2026, 22:34.
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Gremlin
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Post25-10-2017, 9:38    Subject: ESP T3 Engine Assembly Diagram & Guide Quote

To the best of my knowledge, the panes should face outwards.
They are not perfectly straight, but slightly curved, as far as I remember... icon_eek.gif

Photo from the T4 Wiki;
http://www.t4-wiki.de/w/images/Motor_ESP_kreuzscheibe_feder_rollen_AAB.jpg

Unfortunately, I cannot give you a direct link because our company network blocks the page icon_twisted.gif.


Translated on 15-08-2026, 22:35.
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corrivr6



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Post25-10-2017, 9:53    Subject: ESP T3 Engine Assembly Diagram & Guide Quote

Ah, okay.
Yes, then your statement aligns with the exploded diagram.
Because they are also outlined on the outside.

Yes, the panes are slightly curved.
I would like to start assembling it now.
the curvature towards the outer surface of the pump housing.
make. So the pane is lying with...
outer edge attached to the roll, showing the raised portion.
off the cuff.


Translated on 15-08-2026, 22:36.
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corrivr6



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Post25-10-2017, 10:01    Subject: ESP T3 Engine Assembly Diagram & Guide Quote

Two things again, please:

I've read a lot here already, and I'm completely overwhelmed now. icon_smile.gif

There's supposed to be some kind of part that I need to connect to something.
make sure to control it, otherwise the ESP will fail.
full throttle.
What exactly is it, and how is it done?

Where and through which opening/screw?
Do I need to add diesel fuel so that the pump works?
starting up for the first time / won't start / engine won't turn over.
Does it run dry? / Is it running dry?


Translated on 15-08-2026, 22:38.
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Post25-10-2017, 10:44    Subject: ESP T3 Engine Assembly Diagram & Guide Quote

What you mean is the pin on the actuator that shouldn't come out of the control piston (or whatever that part is called).

It's best to glue the feathers on with a little bit of grease (e.g., bearing grease); it makes the work much easier... icon_wink.gif

How you choose to bleed the pump is up to you.
It can be a bit tricky to fill the reservoir directly because the wing cell pump is in the way.
I will achieve this by creating a vacuum at the return port of the pump; the return line itself must be sealed.


Translated on 15-08-2026, 22:40.
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