7A engine rebuild

Alistair55 · 28-03-16, 02:54 PM

hi guys and gals, after a bit a very unfortunate event off my crankshaft pulley coming loose (i had never touched it since owning the car, so can only assume it wasn't tightened correctly last time it was off) i am in the process off rebuilding my engine. ive got it fully stripped and have ordered most of the parts needed baring the piston rings which are according to Pete at quattro corner are obsolete and all he can get hold off are oversized pistons but there £220 each and thats a bit more than i would like to spend. so i was just wondering if anyone on here knew off somewhere that i could get hold off some rings from?

Any help is much appreciated, Many thanks Alistair

Andy10v · 28-03-16, 05:18 PM

Iroz list Goetze rings, $31.50/piston set

http://www.irozmotorsport.com/oem-piston-rings/

Have you tried sticking the part numbers in google? (double check the part No.s are correct)

053 198 151 1 set: piston rings F >> 89-K-350 000 82,50 X 7A 2009.86 - 2007.89

054 198 151 B 1 set: piston rings F 8A-L-000 001>> 82,50 X 7A

054 198 153 1 set: piston rings (oversize) 82,75 1 7A

054 198 155 1 set: piston rings (oversize) 83,00 1 7A

John. · 28-03-16, 05:44 PM

Maybe useful as well.....

http://www.enginepartsuk.net/sites/default/files/K6.pdf

quattrodave · 01-04-16, 04:37 PM

Measure the rings, there are 2 different sizes of 7A 2nd piston rings 1.2 or 1.5, when I got a set of rings for my rebuild they had the wrong size 2nd rings and eventually I managed to get another set from a 10v engine that was 82.5 bore and with the 2 sets made up a full set for my own rebuild.

4v6 · 01-04-16, 05:04 PM

Check the ring endgaps first, if the bores are worn new rings wont help.

Alistair55 · 02-04-16, 09:02 PM

Thanks guys, since I was taking the head to the local engineering shop to have the valve guides pressed in and seats cut and crank polished, I've taken them the pistons and asked if they could source some rings or oversize pistons from there suppliers and check the bores as my bore gauges arnt the best as there's a mark on the power side of the bore where the 1st compression ring sits at tdc. If worst comes to worst I will have to get oversize pistons.
In some ways I'm glad I stripped it as its deffinatly missed some oil changes in its life and was getting rebuilt next winter anyway. It's just come a little sooner unfortunately haha

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28-03-16, 05:18 PM	#2
Andy10v Grown up member Classic Audi Club Member Join Date: Dec 2008 Location: Stirling Posts: 861	Iroz list Goetze rings, $31.50/piston set http://www.irozmotorsport.com/oem-piston-rings/ Have you tried sticking the part numbers in google? (double check the part No.s are correct) 053 198 151 1 set: piston rings F >> 89-K-350 000 82,50 X 7A 2009.86 - 2007.89 054 198 151 B 1 set: piston rings F 8A-L-000 001>> 82,50 X 7A 054 198 153 1 set: piston rings (oversize) 82,75 1 7A 054 198 155 1 set: piston rings (oversize) 83,00 1 7A __________________ 2005 350z GT Sold-1992 3B S2 coupe-RS2+, 996s, konis, forged rods, rear torsen.... Sold-1993 ABY coupe

28-03-16, 05:44 PM	#3
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,520	Maybe useful as well..... http://www.enginepartsuk.net/sites/default/files/K6.pdf

01-04-16, 04:37 PM	#4
quattrodave Grown up member Classic Audi Club Member Join Date: Dec 2010 Location: Bingley Posts: 634	Measure the rings, there are 2 different sizes of 7A 2nd piston rings 1.2 or 1.5, when I got a set of rings for my rebuild they had the wrong size 2nd rings and eventually I managed to get another set from a 10v engine that was 82.5 bore and with the 2 sets made up a full set for my own rebuild.

01-04-16, 05:04 PM	#5
4v6 Ex Member Classic Audi Club Member Join Date: Dec 2007 Posts: 5,565	Check the ring endgaps first, if the bores are worn new rings wont help.

02-04-16, 09:02 PM	#6
Alistair55 Newbie! Join Date: Aug 2015 Posts: 9	Thanks guys, since I was taking the head to the local engineering shop to have the valve guides pressed in and seats cut and crank polished, I've taken them the pistons and asked if they could source some rings or oversize pistons from there suppliers and check the bores as my bore gauges arnt the best as there's a mark on the power side of the bore where the 1st compression ring sits at tdc. If worst comes to worst I will have to get oversize pistons. In some ways I'm glad I stripped it as its deffinatly missed some oil changes in its life and was getting rebuilt next winter anyway. It's just come a little sooner unfortunately haha Sent from my Nexus 6 using Tapatalk