20v 7a into b2 90Q

willow · 09-07-15, 04:40 PM

When fitting a 20v 7a engine into a b2 90. Quattro, do I need a flywheel and clutch from a ur Quattro?

pauliusb2 · 09-07-15, 04:46 PM

flywheel from rr quattro or audi 200 turbo,clutch of 7a
im using 200 flywheel for my 3b conversion,i been told that 200 flywheel is lighter then others

willow · 09-07-15, 05:48 PM

Thanks for the reply.

WHat have others used out of interest. What would be the best option with regards to availability?

willow · 10-07-15, 03:12 PM

what other options are available?

PoloGaz · 15-08-15, 06:02 PM

I've just done this conversion, but to a fwd car

I used a 2.2 'kv' engine flywheel and clutch. I got a timing dowel put in the correct location for the 7A engine management. The URQ flywheel already has this, which is the main reason you need a URQ flywheel.

I thought the URQ and KV used the same type of stepped flywheel so you'd need to use a URQ clutch. A 7a flywheel is flat.

you also need to put a pilot bearing into the crankshaft

willow · 21-08-15, 10:35 AM

Quote:

Originally Posted by PoloGaz

I've just done this conversion, but to a fwd car

I used a 2.2 'kv' engine flywheel and clutch. I got a timing dowel put in the correct location for the 7A engine management. The URQ flywheel already has this, which is the main reason you need a URQ flywheel.

I thought the URQ and KV used the same type of stepped flywheel so you'd need to use a URQ clutch. A 7a flywheel is flat.

you also need to put a pilot bearing into the crankshaft

thanks! thats the type of info I need!

Any more info on the pilot bearing you used?

Also how did you locate the new timing towel exactly, just measurements?

Thanks

Regards

william

PoloGaz · 25-08-15, 02:11 PM

The pin is (I believe) aligned with the sensor in the bellhousing when the engine is at TDC on cylinder number 1. I had read somewhere that the pin was located 60-something degrees before top dead centre. But the machine shop told me this was 'nowhere near' but it depends what you mean by TDC I suppose. If we use the TDC marker on the flywheel, then perhaps, but if we use the position of the crankshaft as the reference, then I think not.

As I just allued to, I got a machine shop to install the timing dowel. They had an original 7A flywheel to use as a template. The flywheel was fitted to a crank they had and the orientation was noted. The KV flywheel was then fitted to the same crank and the timing dowel was then added to that position on the KV flywheel. It was a bit more complicated than I envisaged;

I had originally thought to use the reference marker for TDC, but this seems to be in a different location on B2 and B3 gearboxes. So you have to fit the flywheel to a crankshaft so it orients correctly and take measurements from there.

The pilot bearing on the 7A is in the flywheel, presumably to make it easier to replace. Installing one into a virgin crankshaft was straightforward; though I did put it in the freezer the night before and put plenty of moly grease on it to help it along. it didn't reqire a lot of force to get it in. I expect removing it would be a very different story...

I used a 228mm clutch, which is the standard size for the 2.2 KV engine. The 7A engine uses a 240mm clutch normally, but I have not had any issues and nobody seemed to think I would have any when I was asking these questions myself.

I purchased the pilot bearing from ebay, it was a sachs part. Turns out I still have it as a watched item

http://www.ebay.co.uk/itm/3908519548...%3AMEBIDX%3AIT

046105313D was the part number that it matches

There seems to be another part number for the quattro though;

034105313A

Which looks different. (see link below) So whatever pilot bearing you have now is the one you need to buy for the 7A, you'll only know once you remove the transmission. I found a discussion which talks about the 2 different pilot bearings. Seems to relate to the type of gearbox fitted

http://www.motorgeek.com/viewtopic.p...0460&view=next

Colin Aitchison · 03-12-15, 07:56 AM

Hi Willow, I got help from Pologaz when fitting my 20v engine but I fitted my own timing pin with aid from
my CAD program 4 x M10 bolts, P.V.C. tape and a pencil, if you still need help send PM with email address and will send photos.

25-08-15, 02:11 PM	#7
PoloGaz Grown up member Classic Audi Club Member Join Date: Aug 2012 Location: Manchester Posts: 362	The pin is (I believe) aligned with the sensor in the bellhousing when the engine is at TDC on cylinder number 1. I had read somewhere that the pin was located 60-something degrees before top dead centre. But the machine shop told me this was 'nowhere near' but it depends what you mean by TDC I suppose. If we use the TDC marker on the flywheel, then perhaps, but if we use the position of the crankshaft as the reference, then I think not. As I just allued to, I got a machine shop to install the timing dowel. They had an original 7A flywheel to use as a template. The flywheel was fitted to a crank they had and the orientation was noted. The KV flywheel was then fitted to the same crank and the timing dowel was then added to that position on the KV flywheel. It was a bit more complicated than I envisaged; I had originally thought to use the reference marker for TDC, but this seems to be in a different location on B2 and B3 gearboxes. So you have to fit the flywheel to a crankshaft so it orients correctly and take measurements from there. The pilot bearing on the 7A is in the flywheel, presumably to make it easier to replace. Installing one into a virgin crankshaft was straightforward; though I did put it in the freezer the night before and put plenty of moly grease on it to help it along. it didn't reqire a lot of force to get it in. I expect removing it would be a very different story... I used a 228mm clutch, which is the standard size for the 2.2 KV engine. The 7A engine uses a 240mm clutch normally, but I have not had any issues and nobody seemed to think I would have any when I was asking these questions myself. I purchased the pilot bearing from ebay, it was a sachs part. Turns out I still have it as a watched item http://www.ebay.co.uk/itm/3908519548...%3AMEBIDX%3AIT 046105313D was the part number that it matches There seems to be another part number for the quattro though; 034105313A Which looks different. (see link below) So whatever pilot bearing you have now is the one you need to buy for the 7A, you'll only know once you remove the transmission. I found a discussion which talks about the 2 different pilot bearings. Seems to relate to the type of gearbox fitted http://www.motorgeek.com/viewtopic.p...0460&view=next Last edited by PoloGaz; 25-08-15 at 02:20 PM.

09-07-15, 04:46 PM	#2
pauliusb2 Newbie! Join Date: Jun 2015 Posts: 14	flywheel from rr quattro or audi 200 turbo,clutch of 7a im using 200 flywheel for my 3b conversion,i been told that 200 flywheel is lighter then others

09-07-15, 05:48 PM	#3
willow Grown up member Join Date: Feb 2014 Location: Kerry Ireland Posts: 163	Thanks for the reply. WHat have others used out of interest. What would be the best option with regards to availability?

10-07-15, 03:12 PM	#4
willow Grown up member Join Date: Feb 2014 Location: Kerry Ireland Posts: 163	what other options are available?

15-08-15, 06:02 PM	#5
PoloGaz Grown up member Classic Audi Club Member Join Date: Aug 2012 Location: Manchester Posts: 362	I've just done this conversion, but to a fwd car I used a 2.2 'kv' engine flywheel and clutch. I got a timing dowel put in the correct location for the 7A engine management. The URQ flywheel already has this, which is the main reason you need a URQ flywheel. I thought the URQ and KV used the same type of stepped flywheel so you'd need to use a URQ clutch. A 7a flywheel is flat. you also need to put a pilot bearing into the crankshaft

03-12-15, 07:56 AM	#8
Colin Aitchison Senior Member Classic Audi Club Member Join Date: Dec 2013 Location: Back home in Tillicoultry Posts: 1,315	Hi Willow, I got help from Pologaz when fitting my 20v engine but I fitted my own timing pin with aid from my CAD program 4 x M10 bolts, P.V.C. tape and a pencil, if you still need help send PM with email address and will send photos.