Volvo 850 t5 main bearing sizes

[Bigsi15]

Hia all
Sorry if this has already been covered but I'm at a loss.

I am rebuilding my 850 engine (b5234t) and I'm currently stuck on the main bearings as volvo can't find them, apparently they are colour coded however I can't find any colour on them or a reference to a colour. The long number on the bearings themselves don't coincide with the part number and cannot be found on volvos system

The bearings I'm looking to replace are the main big end bearings and the crankshaft bearings

Any help would be greatly appreciated thank you
Si

[Dangerous Dave]

The block and the crank will be stamped with a code like 1BBBBB. These codes are what determine which bearing sizes you need.

See this post
http://volvospeed.com/vs_forum/topic...comment=968849

[Dangerous Dave]

Updated post above

[Bigsi15]

Thanks dave that's very helpful I had a feeling that code may be related to those and I have asked Volvo about it but they seem to have no idea! do you know how those numbers would equate to part numbers and them looking them up? Thanks again

[Bigsi15]

This is what I have, not quite the same though

[oblark]

Wrong side, have a look on the other side (180 degrees) from these numbers.

[Bigsi15]

Lol! OK thanks il have a look in a bit. How do I explain this to volvo though?! They just keep going on about colours!

Thanks again

[oblark]

Just tell them you have for example :- a B block with a B crank

And they should be able to cross referance it from that

[Bigsi15]

Haha oblark I like your optimism! I hope so though!
This is what I have found I assume this is what you mean? Any ideas on colours though as that's what they seem to keep going on about!

[Bigsi15]

[Bigsi15]

6 B's and CCBCBC I think

[Dangerous Dave]

There are two markings, you have the one on the block, there is also one on the crank. You have to match the two numbers together to get the colour codes in the pic below



The 1 means start at the timing/oil pump end and there are 6 letters, one for each bearing between the cylinders. So your block is 1BBBBB, if your crank is also 1BBBBB then you'll need all Yellow bearings.

If the crank was 1CAABB and block 1BBBBB then matching the first letters for the first bearing in the line would be C and B needing a Red and a Yellow combination (for block and intermediate section respectively). The next bearing would be A and B requiring a Yellow and a Blue bearing combination.

Hope this makes sense.

Post your crank marking up (will be on the end of one of the counterweights)

[Dangerous Dave]

LOL, beat me to it.

So your crank is 1CCBCBC and the block is 1BBBBBB meaning you need (block and intermediate section bearings respectively):
Bearing 1 - Red (Thin) + Yellow (medium)
Bearing 2 - Red (Thin) + Yellow (medium)
Bearing 3 - Yellow (medium) + Yellow (medium)
Bearing 4 - Red (Thin) + Yellow (medium)
Bearing 5 - Yellow (medium) + Yellow (medium)
Bearing 6 - Red (Thin) + Yellow (medium)

[Dangerous Dave]

Also, contact FRF Swansea for the parts as you get a discount if you're a forum member (see thread below) I got my parts from them for my rebuild.

http://www.vpcuk.org/forums/showthre...der&highlight=

[Jamest5r]

Top work Mr DD , should make that a "sticky" thread.

[Bigsi15]

Dangerous Dave what an absolute hero you are! It all makes sense now lol! I only wish I'd read this a bit earlier as I've just spent the past couple of hours fannying around with an unreadable Haynes manual trying to work it out for myself but the good news is it matches your maths!
I guess the only other quandary is are there different bearing types or part numbers for these engines? For some reason I randomly have a large curved Edge bearing in slot number 4 on the top and bottom but all the others are the usual flat Style. Is this common?
Thanks again

[Bigsi15]

OK got the wrong slot from memory but hopefully can see what I mean by the different shape/style of bearing randomly in there. Pattern matches top and bottom

[Bigsi15]

Top work Mr DD , should make that a "sticky" thread.

Totally agree with this as this was a massive ball ache for me and Volvo at my end had absolutely no idea how to work this out

[Dangerous Dave]

Dangerous Dave what an absolute hero you are! It all makes sense now lol! I only wish I'd read this a bit earlier as I've just spent the past couple of hours fannying around with an unreadable Haynes manual trying to work it out for myself but the good news is it matches your maths!
I guess the only other quandary is are there different bearing types or part numbers for these engines? For some reason I randomly have a large curved Edge bearing in slot number 4 on the top and bottom but all the others are the usual flat Style. Is this common?
Thanks again

The curved edge bearing (Volvo call it a flange bearing) I guess is to make sure there is no longitudinal movement of the crank.

Give me a couple of minutes, I'll get some part numbers for the bearings

[Dangerous Dave]

Part numbers (upper being the block and lower being the intermediate section). Obviously check these part numbers are correct with Volvo as I'd look like a right plonker if you got the wrong parts.

Red, upper - 8687951
Blue, upper - 8687953
Yellow, upper - 8687952

Red, lower - 8687961
Blue, lower - 8687963
Yellow, lower - 8687962

Flange bearing, red, upper - 31216061
Flange bearing, blue, upper - 31216063
Flange bearing, yellow, upper - 31216062

Flange bearing, red, lower - 8642491
Flange bearing, blue, lower - 8642493
Flange bearing, yellow, lower - 8642492

There are also part numbers for oversize bearings but I guess that is if you are having the crank re-ground

Sometimes Volvo update the parts but can usually cross reference the old number against the updated part.

And yeah, some dealers can be a bit dodgy when it comes to complex part details as they probably don't have to deal with parts like that very often.

Hope this helps

P.S. here is a link to a US parts store where they list the part numbers for pretty much everything (link is to the crank system)
http://www.volvopartswarehouse.com/a...GR-381886.html