Which waterpumps is this?

[Laaf]

Which waterpump is this? Is it an RS2 pump, the previous owner state it is in some info I got on the car, but I don't get the part number to add up. 074 121 019C

And also, the car has a 3B block but with a AAN, ABY and ADU belt tensioner and a ADU camwheel, so what timing belt to use?

[UrS4boy]

Which waterpump is this? Is it an RS2 pump, the previous owner state it is in some info I got on the car, but I don't get the part number to add up. 074 121 019C. And also, the car has a 3B block but with a AAN, ABY and ADU belt tensioner and a ADU camwheel, so what timing belt to use?

I asked my friend Kate and she says that that part number (074 121 019C) does not compute. (might just be the casting number, not the actual water pump number)

The AAN, ABY water pump is 054121004AX (where X = rebuilt) and has 29 teeth.

The ADU water pump is 034121004B and has 26 teeth.



The 3B (and KV, NM and 7A) water pump is 034121004X. Obviously normal 3Bs tension their cam belts by rotating the water pump, as shown below. With AAN or ABY water pump and AAN/ABY/ADU belt tensioner (if it works), then you would go with the 119H 151 tooth belt. If you had an RS2 water pump, then the belt would be the 119C 150 tooth belt (see photo). The AAN, ABY and ADU cam sprockets are all the same diameter with the same number of teeth.

3B water pump:


AAN/ABY/ADU Timing belt tensioner:


Timing Belt PNs: (151 = AAN and ABY, 147 = 3B, 150 = ADU)

[UrS4boy]

Found an old post of mine where I said "the ADU water pump has 26 teeth. The AAN and ABY water pump has 29 teeth (just counted the one I took out last year).". This implies that you could figure out which pump you have by counting the teeth on the water pump toothed sprocket.

[epic]

Just what i was going to say

Found an old post of mine where I said "the ADU water pump has 26 teeth. The AAN and ABY water pump has 29 teeth (just counted the one I took out last year).". This implies that you could figure out which pump you have by counting the teeth on the water pump toothed sprocket.

[twoqu]

I would think that the 074 bit of the p/n implies its origins are from a 2.5 TDi 5 cylinder which also does not use the water pump as a tensioner. Might be from a VW commercial.

[bartolomeus]

http://lmgtfy.com/?q=074121019C

[UrS4boy]

3B, AAN, ABY and ADU Water Pump and Timing Belt Info

Just what i was going to say

Great minds think alike, fools seldom differ.

I put all the water pump and timing belt info into one post:

http://forums.quattroworld.com/s4s6/msgs/131710.phtml

[bartolomeus]

Did you see that it's a Volvo water pump?

http://www.findpart.org/part/vol-074121019c

[Sleeper_Avant]

2.5TDi?

i got this!!!

OEM
074 121 005 N
074 121 005 NU
074 121 005 NV
074 121 005 NX


Model Engine Chassis CC KW CYL Type Year
AUDIA6 (4A, C4)1994/06 - 1997/02
A6 (4A, C4) 2.5 TDI AAT 4A, C4 2461 85 5 Saloon 94.06 - 97.02
A6 (4A, C4) 2.5 TDI AEL 4A, C4 2461 103 5 Saloon 94.08 - 97.02
A6 (4A, C4) 2.5 TDI quattro AEL 4A, C4 2461 103 5 Saloon 95.10 - 97.02
AUDIA6 Avant (4A, C4)1994/06 - 1997/12
A6 Avant (4A, C4) 2.5 TDI AAT 4A, C4 2461 85 5 Estate 94.06 - 97.12
A6 Avant (4A, C4) 2.5 TDI AEL 4A, C4 2461 103 5 Estate 94.08 - 97.12
A6 Avant (4A, C4) 2.5 TDI quattro AEL 4A, C4 2461 103 5 Estate 95.07 - 97.12
VOLKSWAGENLT 28 I Bus (281-363)1975/04 - 1996/06
LT 28 I Bus (281-363) 2.4 D ACT 2383 51 Bus 89.08 - 96.06
LT 28 I Bus (281-363) 2.4 TD ACL 2383 70 Bus 92.09 - 96.06
VOLKSWAGENLT 28-35 I Box (281 -363)1975/04 - 1996/06
LT 28-35 I Box (281-363) 2.4 D 1S 2383 51 Box 90.07 - 96.05
LT 28-35 I Box (281-363) 2.4 TD ACL 2383 70 Box 92.06 - 96.05
VOLKSWAGENLT 28-35 I Flatbed/Chassis (281-363)1975/04 - 1996/06
LT 28-35 I Flatbed/Chassis (281-363) 2.4 D 1S 2383 51 Flatbed /Chassis 90.08 - 96.06
LT 28-35 I Flatbed/Chassis (281-363) 2.4 TD ACL 2383 70 Flatbed /Chassis 92.08 - 96.06
VOLKSWAGENLT 28-35 II Bus(2DM)1996/04 - /
LT 28-35 II Bus (2DM) 2.5 TDI ANJ 2461 80 Bus 99.05 -
LT 28-35 II Bus (2DM) 2.5 TDI BBE 2461 61 Bus 01.05 -
LT 28-35 II Bus (2DM) 2.5 TDI BBF 2461 70 Bus 01.05 -
VOLKSWAGENLT 28-46 II Box(2DX0AE)1996/04 - /
LT 28-46 II Box (2DX0AE) 2.5 TDI ANJ 2461 80 Box 99.05 -
LT 28-46 II Box (2DX0AE) 2.5 TDI BBE 2461 61 Box 01.05 -
LT 28-46 II Box (2DX0AE) 2.5 TDI BBF 2461 70 Box 01.05 -
VOLKSWAGENLT 28-46 II Flatbed/Chassis (2DX0FE)1996/04 - /
LT 28-46 II Flatbed/Chassis (2DX0FE) 2.5 TDI ANJ 2461 80 Flatbed /Chassis 99.05 -
LT 28-46 II Flatbed/Chassis (2DX0FE) 2.5 TDI BBE 2461 61 Flatbed /Chassis 01.05 -
LT 28-46 II Flatbed/Chassis (2DX0FE) 2.5 TDI BBF 2461 70 Flatbed /Chassis 01.05 -
VOLKSWAGENLT 40-55 I Box (291-512)1975/04 - 1996/06
LT 40-55 I Box (291-512) 2.4 D 1S 2383 51 Box 90.07 - 96.05
LT 40-55 I Box (291-512) 2.4 TD ACL 2383 70 Box 92.06 - 96.05
VOLKSWAGENLT 40-55 I Flatbed/Chassis (293-909)1975/04 - 1996/06
LT 40-55 I Flatbed/Chassis (293-909) 2.4 D 1S 2383 51 Flatbed /Chassis 90.08 - 96.06
LT 40-55 I Flatbed/Chassis (293-909) 2.4 TD ACL 2383 70 Flatbed /Chassis 92.08 - 96.06
VOLKSWAGENTRANSPORTER IV Box (70XA)1990/07 - /
TRANSPORTER IV Box (70XA) 2.4 D AAB 2370 57 Box 90.07 - 03.04
TRANSPORTER IV Box (70XA) 2.4 D AJA 2370 55 Box 97.08 - 03.04
TRANSPORTER IV Box (70XA) 2.4 D Syncro AAB 2370 57 Box 92.10 - 03.04
TRANSPORTER IV Box (70XA) 2.5 AAF 2461 81 Box 90.11 - 03.04
TRANSPORTER IV Box (70XA) 2.5 AET 2461 85 Box 96.08 - 03.04
TRANSPORTER IV Box (70XA) 2.5 Syncro AAF 2461 81 Box 92.10 - 03.04
TRANSPORTER IV Box (70XA) 2.5 Syncro AET 2461 85 Box 96.08 - 03.04
TRANSPORTER IV Box (70XA) 2.5 TDI ACV 2461 75 Box 95.09 - 03.04
TRANSPORTER IV Box (70XA) 2.5 TDI AJT 2461 65 Box 98.12 - 03.04
TRANSPORTER IV Box (70XA) 2.5 TDI Syncro ACV 2461 75 Box 95.09 - 03.04
VOLKSWAGENTRANSPORTER IV Bus (70XB,70XC,7DB,7DW)1990/09 - /
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.4 D AAB 2370 57 Bus 90.09 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.4 D AJA 2370 55 Bus 97.08 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.4 D Syncro AAB 2370 57 Bus 92.10 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.5 AAF 2461 81 Bus 90.11 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.5 AET 2461 85 Bus 96.08 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.5 Syncro AAF 2461 81 Bus 92.11 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.5 Syncro AET 2461 85 Bus 96.07 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.5 TDI ACV 2461 75 Bus 95.09 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.5 TDI AJT 2461 65 Bus 98.05 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.5 TDI AHY 2461 111 Bus 98.05 - 03.04
TRANSPORTER IV Bus (70XB, 70XC, 7DB, 7DW) 2.5 TDI Syncro ACV 2461 75 Bus 96.01 - 03.04
VOLKSWAGENTRANSPORTER IV Flatbed/Chassis (70XD)1990/07 - /
TRANSPORTER IV Flatbed/Chassis (70XD) 2.4 D AAB 2370 57 Flatbed /Chassis 90.09 - 03.04
TRANSPORTER IV Flatbed/Chassis (70XD) 2.4 D AJA 2370 55 Flatbed /Chassis 97.08 - 03.04
TRANSPORTER IV Flatbed/Chassis (70XD) 2.4 D Syncro AAB 2370 57 Flatbed /Chassis 92.10 - 03.04
TRANSPORTER IV Flatbed/Chassis (70XD) 2.5 AAF 2461 81 Flatbed /Chassis 90.11 - 03.04
TRANSPORTER IV Flatbed/Chassis (70XD) 2.5 AET 2461 85 Flatbed / Chassis 96.08 - 03.04
TRANSPORTER IV Flatbed/Chassis (70XD) 2.5 Syncro AAF 2461 81 Flatbed /Chassis 92.10 - 03.04
TRANSPORTER IV Flatbed/Chassis (70XD) 2.5 Syncro AET 2461 85 Flatbed /Chassis 96.08 - 03.04
TRANSPORTER IV Flatbed/Chassis (70XD) 2.5 TDI ACV 2461 75 Flatbed /Chassis 95.09 - 03.04
TRANSPORTER IV Flatbed/Chassis (70XD) 2.5 TDI AJT

[twoqu]

I beleive the TDi pump pulley would have 20 teeth. So count how many you have in case!
Its possible someone has pressed a 20V pulley on a TDi pump. The pulley on a TDi pump is wider to take the increased timing belt width of 26.5mm. The pulley width is @27mm. The pulley also appears to have threaded holes in it which I can't remember seing on a water pump before.
I have checked an aftermarket TDi water pump and can confirm the 20 teeth. I might be able to find an original used TDi water pump tomorrow to check the casting number against.

[UrS4boy]

You can see the wider pulley and the fewer teeth in this photo from one of the googled website for the 074 PN:

[twoqu]

Doesn't look like a I5 pump to me!
Of course another explanation might be if its an exchange pump. Perhaps they just use whatever is salvagable like the casing and stick a new impeller and pulley in there!
If you look at the pics here you can just make out the same casting number but with a 20 tooth pulley!
http://www.ebay.de/itm/EGU-VW-Wasser...-/160287308446

[UrS4boy]

If you look at the pics here you can just make out the same casting number but with a 20 tooth pulley! http://www.ebay.de/itm/EGU-VW-Wasser...-/160287308446

This? (I count 20 also (good thing I still have all my fingers and toes) )

[UrS4boy]

This? (I count 20 also (good thing I still have all my fingers and toes) )

On the original posters photo on roughly 1/4 of the pulley I count 7 teeth (x 4 = 28) (which is more likely, 29 = ABY or 26 = ADU?)

[twoqu]

I'm going for an exchange (X) 20V pump! The OP just needs to count the teeth to verify.
Still curious about the threaded holes though.