07k main bearings

Transplanting the new VW 5cylinder

07k main bearings

Postby Afterthought » Sun Nov 07, 2021 1:04 pm

Got a question for anyone that had any experience building the 07k or Newer VW engines .

My goal is to figure out exactly what to order here to build this bottom end right .
I ordered a set of ACL race bearings , P/N :
6M5563H - STD , and a plastigauge Set.

I’m finding some info that says that the main bearings are color coded, I don’t see exactly where this is . So what I’m unsure about is if I can plan just using the set of king bearings I ordered for standard size - or if I need to take the block and have it line honed to do that .

I disassembled the engine and now I have a bare block, I kept track and marked all the mains and caps in order .

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Re: 07k main bearings

Postby Afterthought » Sun Nov 07, 2021 10:17 pm

I guess a good plan might to be measure everything with the new bearings first and see where I’m at .

This reminds me I also need to do the 360 degree thrust bearing mod so sill have to verify I actually got the right bearing
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Re: 07k main bearings

Postby audifreakjim » Mon Nov 08, 2021 12:53 pm

There is a stamping on the block that shows what color(Size) bearings it requires. I've just been re-using the OEM bearings, they are almost always in very good shape.

But instead of doing this dance, it may be worth doing studs, and a line hone done to fit a standard size bearing.
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07k main bearings

Postby Afterthought » Mon Nov 08, 2021 1:23 pm

audifreakjim wrote:There is a stamping on the block that shows what color(Size) bearings it requires. I've just been re-using the OEM bearings, they are almost always in very good shape.

But instead of doing this dance, it may be worth doing studs, and a line hone done to fit a standard size bearing.


Hey Jim, thanks for the reply. That's a good point, I guess I could also considering re-using these, this is a low mileage engine in great shape.

Alex found some info from a guy who builds TTRS engines that the factory tolerances are very tight and he said he likes to open them up. (see below)

I have a set of arp hardware for the mains I could use, I think they might require drill and tap.
Pistons, rods , bearings , flywheel and clutch. So in theory if I check with the local shop and see if they can do a line hone then I might as well have the whole assembly balanced at that time.

I wish I could just do all this myself. I hate dropping off my stuff at machine shops.

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Re: 07k main bearings

Postby Afterthought » Mon Nov 08, 2021 1:39 pm

Here’s what I could find
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Re: 07k main bearings

Postby Afterthought » Tue Nov 16, 2021 8:28 pm

Here are the numbers on the block
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07k main bearings

Postby Afterthought » Tue Nov 16, 2021 8:42 pm

•modify the main cap to accept the old i5 (7a, aan) thrust bearing .
•measure with my new bearings and see what clearance is.
•drop off block to machine shop and have them balance the rotating assemble

For modifying the cap, I don’t know the depth or width of the recess that needs to be machined in . I guess I’ll start by first measuring the bearing and then maybe measuring an old i5 main cap or just the block side of the thrust bearing to get an idea .

This is what the parts looked like coming out :
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