Have you rebuilt your own S85? - Page 3 - BMW M5 Forum and M6 Forums
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post #21 of 30 Old 8th February 2014, 07:01 AM
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post #22 of 30 Old 28th February 2014, 10:45 PM
335xi
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Troy, you should go into Stroker building.

Quote:
Originally Posted by TROY JEUP View Post
Swapping out rod bearings will cost you around $850 for all the parts from rod bearings to bolts to vanos pump chain tensioners to oil pan gasket. This is a very simple task.

Trying to rebuild an S85, requires cylinder honing by a machine because the cylinders taper like hell at around 60k (not honing by hand).

New vanos pump, oil pump, vanos units on cylidners, cam caps, head gaskets, main bearings, front/rear seal, etc.

All said and done, the typical rebuild costs me $6,000 to have this done in parts and machining. This is aside from having purchased $1500 in BMW oem tools for timing and checking tolerances, etc. I sell the rebuilt motors with 0-miles on them for $10,000 to a customer.

The used motors we sell are from $6000 to $9000 depending on year and mileage. That is the reason 99% of the people who buy motor from us just want a used motor with new bearings & vanos line service that we offer for free with the purchase of a motor. We also warranty them for 2-years or 30k miles.

Rebuilding an S85 "correctly" will run you around $6000, and that is a spun-bearing motor. If the injector locked up, you are back another $2500 for sleeves in the block.

If you just throw it together and go the cheap route and try to flush the metal out of everything, it will probably get your cost down to around $2500 in parts. However, getting that motor to stay out of limp mode will be next to impossible. The motor is too smart and it knows if the motor had metal in the vanos units, solenoids, etc and it will stay in limp mode until you change those parts.

This is a $52000 motor for a reason and people don't rebuild them correctly for a reason, because the parts are too much money. This is no Chevy 350. ;-P


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It can't be that much more work than the full rebuild you already do....
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post #23 of 30 Old 1st March 2014, 03:58 AM
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It can't be that much more work than the full rebuild you already do....

To change bearings, rod bolts, & vanos line is significantly easier than a full-on rebuild that requires machining, etc. ;-). Anything can be done, it just depends on how much money it makes sense to throw at it.

The reman motors I have, we sell for $10k, the used motors we sell for $6k + core ~ which is significantly less money.


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post #24 of 30 Old 1st March 2014, 07:19 AM
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troy you should make a thread in your sponsor section about your reman. 0
mile motors

also guys keep in mind one thing. not many mechanics in america will want to do a rod bearing job (even though its easy as shit to a legitimate experienced mechanic) because of lack of experience, and most importantly, it's an expensive job on their part and they might not have sufficient shop resources to do it. it's also a really big headache to get to the oil pan. of course do this enough times (troy, raikku, duschanio) and it's pretty easy. but when they aren't a lot of s85 to work on, less mechanics are educated/experienced with it, it won't be easy to find someone to do it without them asking ridiculous prices. case in point someone in another thread stated his local BMW dealer told him 50 hours LOLOLOLOLOL

got that bit of info from my mechanic uncle who's done 2 s85 rod bearing jobs

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post #25 of 30 Old 1st March 2014, 01:28 PM
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post #26 of 30 Old 2nd March 2014, 06:44 AM
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Troy. Do you sell rod bearing kits?

I don't sell them because I would have to mark it up to sell the parts I guess ~ but I am more than happy to help you with finding the parts you need. The list of parts needed is actually really simple, although the 702/703 bearings are on back order as of last Wednesday. I bought the remaining 55 bearing shell sets in the country or so I was told that...lol. Some were from a cali dealer, Vegas dealer, and another set from somewhere in Miami. ;-)

I was told BMW is going to be changing the 702/703 and moving to yet another bearing part # within the next few months, so they are not really focusing on replenishing the inventory in the USA with the current bearings. We shall see soon enough.


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post #27 of 30 Old 2nd March 2014, 01:22 PM
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Thanks!!! Guess I won't be driving until the new ones come out. Can you keep us updated on these New bearimgs?
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post #28 of 30 Old 25th March 2014, 11:00 PM
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Can vantaam or duschiano send me your email adress via MP I can't MP members for the moment and I am actualy rebuilding an SB85. A little help would be welcome :-)
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post #29 of 30 Old 14th May 2019, 06:32 AM
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Can you contact me id like to talk to you about buying a rebuilt motor with either 0 miles or a used motor with rod bearing issue fixed. I have 94k miles heard no sounds out of normal(I can hear when car is 0.3L short on oil) and when vanos went out mechanic took a look and 9,& 10 rod bearing no lead left all copper has left groves in the crank so looks like new motor for me! Please email me [email protected] about rebuilt 0 mile motors and used motors fixed issues thank you!
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post #30 of 30 Old 16th May 2019, 12:31 AM
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Hi Troy, I live in the UK so unfortunately won’t be able to use your shop for works to be done. I have just stripped my motor to find 1 main bearing (the rear nearest the flywheel) spun. I’m rebuilding the engine myself and wondered if you would mind giving me advice on the way through of rebuilding. First off my crank is being sent off to be checked for fractures or cracks. Then will be re nitrided and ground and then polished. I need to have my crankshaft bed plate reworked and then the whole thing line bored with the block to make sure it’s good. Are there any pointers you can give to me? Thanks in advance.
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