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85 euro m635csi & m88/3 timing chain - my project

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brickwhite
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85 euro m635csi & m88/3 timing chain - my project

Post by brickwhite » Fri May 23, 2014 7:31 pm

I picked up this 85 euro M635csi.


I've owned a 85 535i e28 but not an e24 and not one with the M88 engine. I took a gamble but we'll see.

I haven't found any rust in the usual spots and I was able to drive her home.

Anyone have a suggestion on where to start with a M6 --

the suspension is similar to the e28 but....

I'm thinking lots of reading.... Clean it, damn its dirty, then fluids, belts, plugs, gas, brakes, electrical, suspension, interior, exterior, etc...

Really don't have a history on the car. Looks like it was a Georgia car and was sold to Frosty and he moved it to St. Louis area around 04, but I really don't know.

Image
Last edited by brickwhite on Tue Dec 18, 2018 1:57 pm, edited 8 times in total.

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Brucey
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Post by Brucey » Fri May 23, 2014 8:31 pm

cruise control..... nice.....

Your list seems good to me.

Some additional thoughts;

1) suspension; check and replace your bump stops (external at the rear, internal to the insert itself at the front.

2) suspension; if your damping isn't good enough after you have done the bumpstops, replace or rebuild yer billies. (and if you still don't like it after that, get some different ARBs (sway bars)).

3) cam chain. If in doubt replace it and the guides. This will be $$$$ but a bunch less than any kind of camchain breakage, and they do break, oh yes...

4) balance the TBs, clean the injectors; revel in the crispness...

5) there is loads more power in the motor... you could try letting some of it out....?

cheers
~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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Post by GazM3 » Fri May 23, 2014 10:06 pm

Looks great.

Lots if potential.

and adding I what Brucey said these are the most improvements of least money spent that I have seen with upgrading the m635

1/ strut brace - massive improvement to steering and front end grip.
2/ steering bracket fix - removed most of the free play in the steering.
3/ installing rear e34 540i rear brakes with braided hoses - I have more stopping power than most modern "performace cars".

One if the relatively big ticket items I done was refresh the fuel system totally.
This involved replacing both fuel pumps, injectors, regulator, filter, and a section of fuel line that was nearly folded flat, with a small adjustment computer to alter the fuel signal. I haven't dyno's it yet but I wouldn't r surprised if I haven't picked up at least 30kw in parts if the rev range and economy has improved dramatically from an average if about 350km per tank to around 500km in urban driving.

Another big ticket expensive item I have done was replace the std gearbox for a dogleg with 1:1 5th and a slighly lower final drive to 3.46:1. This mod is not for everyone but the dogleg box is very fast shifting box. 1st is about where it was before but 2-5th are all very tightly spaced so its easy to keep the engine on the boil when driving hard
BMW’s
74 2002 2.3ltr
84 E24 M635csi
94 E34 540i/6 SC
97 E36 M3 euro SC U/C

OTHERS
02 Landrover D2 td5
08 Holden Ute 6.0
11 Audi S5

brickwhite
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AFM part number

Post by brickwhite » Fri Jun 06, 2014 6:07 pm

As you can see my AFMis missing its cap, any idea how to tell a AFM part number without the CAP?

Should be a 0280203025 but the previous owned was messing with the AFMs

thanks

GazM3
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Post by GazM3 » Fri Jun 06, 2014 9:12 pm

No idea to tell which one it is.
Any cap will fit on it.

Perhaps do a voltage check on it to see if the voltage change is linear.

There is quite abit u can do in tuning the m635 but get the basics done first then we will school you on it.
BMW’s
74 2002 2.3ltr
84 E24 M635csi
94 E34 540i/6 SC
97 E36 M3 euro SC U/C

OTHERS
02 Landrover D2 td5
08 Holden Ute 6.0
11 Audi S5

brickwhite
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M88 Chain replacement

Post by brickwhite » Thu Jun 19, 2014 4:18 pm

So, I was told and read that the weak point on a M88 is the Chain.

I saw - viewtopic.php?t=18334&highlight=m88+s38+timing+chain

and got this Part list

SPROCKET INTAKE 1 11311305393
SPROCKET EXHAUST 1 11311305394
TIMING CHAIN 1 11311401379
SPROCKET 1 11311305396
NEEDLE SLEEVE 1 11311304258
AXLE 1 11311304256
O-RING 1 11311304257
SLIDE RAIL 1 11311306580
CHAIN TENSIONER 1 11311307442
CHAIN TENSIONER 1 11311317335
SLIDE RAIL 1 11311306603
SPROCKET 1 11211305390
GASKET 1 11121317689
GASKET 3 11121312173
CHAIN 1 11411716988
SPROCKET 1 11411273689
O-RING 2 11531304176
TENSIONER 1 11317838675 Or the e36/M3/s50 tensioner - 11311405081

I'm thinking I'll need a new crank hub for the m88 which is NLA
I guess I have 2 options buy a m30 hub have a slot added or aftermarket, frank Fahey or the like

Anyone see Something I'm missing?


I'll do coolant hoses too wp etc.

GazM3
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Post by GazM3 » Thu Jun 19, 2014 8:02 pm

If there is no history on the chain being done its good protection for your investment. The hub is a good thing to do and it allows in the future to rev it up to 7500 instead if the lowish 6900 factory cutout.

I didn't check the part number but most if us run the e36 m3 euro 3.2 tensioner.
BMW’s
74 2002 2.3ltr
84 E24 M635csi
94 E34 540i/6 SC
97 E36 M3 euro SC U/C

OTHERS
02 Landrover D2 td5
08 Holden Ute 6.0
11 Audi S5

brickwhite
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Post by brickwhite » Thu Jun 19, 2014 8:18 pm

Can I use an M30 crank hub? or a hub from the S38b36 - 11231312783

Image

GazM3 wrote:If there is no history on the chain being done its good protection for your investment. The hub is a good thing to do and it allows in the future to rev it up to 7500 instead if the lowish 6900 factory cutout.

I didn't check the part number but most if us run the e36 m3 euro 3.2 tensioner.

m6dave
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Post by m6dave » Thu Jun 19, 2014 11:04 pm

I would not recommend modifying an M30 hub. This is a known weak point on these engines and the failure mode can be a broken crankshaft. Do your own risk assessment on saving $300 now compared to rebuilding an engine including replacing the crankshaft. The wall thickness of the hub is too small, over time and under the tension applied by the nut the hub goes barrel shaped and becomes shorter. This then reduces the tension applied by the nut and allows the hub to vibrate on the end of the crankshaft.
I think the best result is to spring for the Frank Faye hub, he is a great guy to deal with.

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TBM
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Post by TBM » Fri Jun 20, 2014 12:28 am

m6dave wrote:I would not recommend modifying an M30 hub. This is a known weak point on these engines and the failure mode can be a broken crankshaft. Do your own risk assessment on saving $300 now compared to rebuilding an engine including replacing the crankshaft. The wall thickness of the hub is too small, over time and under the tension applied by the nut the hub goes barrel shaped and becomes shorter. This then reduces the tension applied by the nut and allows the hub to vibrate on the end of the crankshaft.
I think the best result is to spring for the Frank Faye hub, he is a great guy to deal with.
I am making my own crank hub in the next two weeks. It is identical to the original except it will be made from 4041 tool steel and rockwell at 39 on the C scale. The cost is $400 (my cost) FOB los angeles. Let me know... I think Fahey wants 650 for his.

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Freshbread
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Post by Freshbread » Fri Jun 20, 2014 4:22 am

How is the interior?
1984 745i, 2014 Fiesta ST

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hornhospital
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Post by hornhospital » Fri Jun 20, 2014 5:28 am

TBM wrote: I am making my own crank hub in the next two weeks. It is identical to the original except it will be made from 4041 tool steel and rockwell at 39 on the C scale. The cost is $400 (my cost) FOB los angeles. Let me know... I think Fahey wants 650 for his.
Did you mean 4140 steel? 4041 is a grade of aluminum. AFAIK there is no 4041 steel grade.
Ken Kanne
'84 633CSi "Sylvia"; '85 635CSi "Katja";'85 325e "Hazel Ann";'87 325is "Odette"; '93 325is "Elvira"; '95 M3 "Ashlyn"; '95 318is "Bebe"

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TBM
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Post by TBM » Fri Jun 20, 2014 5:47 am

hornhospital wrote:
TBM wrote: I am making my own crank hub in the next two weeks. It is identical to the original except it will be made from 4041 tool steel and rockwell at 39 on the C scale. The cost is $400 (my cost) FOB los angeles. Let me know... I think Fahey wants 650 for his.
Did you mean 4140 steel? 4041 is a grade of aluminum. AFAIK there is no 4041 steel grade.
Whoops!!!!

Typo! 4140 it is....

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Post by m6dave » Fri Jun 20, 2014 8:08 am

I bought my hub 3 years ago from Frank for $350 plus shipping.

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Post by TBM » Fri Jun 20, 2014 1:15 pm

m6dave wrote:I bought my hub 3 years ago from Frank for $350 plus shipping.
I stand to be corrected then.

brickwhite
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Post by brickwhite » Fri Jun 20, 2014 2:12 pm

Freshbread wrote:How is the interior?
Interior on my M6?

Link to my interior thread... viewtopic.php?f=5&t=25116&p=204649#p204649
Last edited by brickwhite on Fri Feb 02, 2018 8:47 pm, edited 1 time in total.

brickwhite
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Post by brickwhite » Tue Jun 24, 2014 2:55 pm

s38 list,?

A few spaces and the list is a bit clearer:

Qty ... Item Description ......................................... Part No. ... OEM price ... Total
1 ... Timing cover gasket set ........................... 11141735047 .... 23.02 ...... 23.02
1 ... Shaft seal .................................................... 11141715100 .... 14.03 ...... 14.03
1 ... Woodruff key crank sprocket ................... 07119951485 ....... 0.88 ........ 0.88
1 ... Sprocket crank ........................................... 11211252573 ..... 39.96 ....... 39.96
1 ... Sprocket intake .......................................... 11311308468 ... 149.65 ... 149.65
1 ... Sprocket exhaust ....................................... 11311308468 ... 149.65 ... 149.65
1 ... Sprocket deflection .................................... 11311304255 ..... 26.56 ...... 26.56
1 ... Needle sleeve deflection .......................... 11311304258 ...... 8.78 ........ 8.78
1 ... Axle deflection ............................................ 11311304256 ..... 26.6 ......... 26.6
1 ... O-ring deflection ......................................... 11311304257 ....... 2.43 ......... 2.43
1 ... Dist. Cover camshaft seal ......................... 11141271415 ..... 15.2 ......... 15.2
2 ... O-rings .......................................................... 12111252257 ....... 3.47 ........ 6.94
1 ... Timing chain ................................................ 11311403081 ... 110.83 ... 110.83
1 ... Slide rail right lower .................................... 11311308495 ..... 13.98 .... 13.98
1 ... S54 timing chain tensioner complete ..................................... 133.46 ... 133.46
1 ... Chain tensioner rail left lower ................... 11311309945 ... 225.47 ... 225.47
1 ... Left lower tensioner O-ring ........................ 7119906328 ......... 0.18 ........ 0.18
1 ... Chain tensioner left upper ......................... 11311317335 ... 207.16 ... 207.16
1 ... Left upper tensioner O-ring ....................... 11311307408 ........ 0.98 ....... 0.98
1 ... Slide rail upper ............................................ 11311308550 ... 121.78 ... 121.78
1 ... Diaphragm .................................................... 11311308309 ..... 90.02 ..... 90.02
2 ... Diaphragm gasket rings ............................. 07119963355 ....... 0.38 ........ 0.76
Sub total ... 1368.32

V-Belts
1 ... Alternator Fan Belt ...................................... 11221706788 ... 12.34 ... 12.34
1 ... A/C Fan Belt ................................................. 64521711056 ... 14.46 ... 14.46
1 ... Power Steering Fan Belt ............................ 32421706750 ... 11.2 ... 11.2
Sub total ... 38.00

Cooling
1 ... Radiator Hose ............................................ 11531306832 ... 19.82 ... 19.82
1 ... Coolant return pipe ................................... 11531306850 ... 17.7 ... 17.7
1 ... Coolant distributor piece ......................... 11531272866 ... 5.37 ... 5.37
1 ... Coolant return hose .................................. 64211374635 ... 16.07 ... 16.07
1 ... Radiator Hose ............................................ 11531310625 ... 22.49 ... 22.49
1 ... Radiator Hose ............................................. 11531306827 ... 13.54 ... 13.54
Sub total ... 94.99

Ignition
1 ... Distributor Cap bosch .................................. 12111725070 ... 71.7 ... 71.7
1 ... Rotor ................................................................ 12111734110 ... 24 ... 24
6 ... Spark plug ........................................................ 12129061882 ... 4 ... 24
Sub total ... 119.70

TOTAL 1621.01

brickwhite
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Non-euro header??

Post by brickwhite » Tue Jul 08, 2014 8:44 pm

Why would my m88 not have the snake euro header on it?
Last edited by brickwhite on Thu Jan 29, 2015 9:06 pm, edited 1 time in total.

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Da_Hose
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Post by Da_Hose » Wed Jul 09, 2014 12:22 am

If you are going through the effort to do things right, then change over to some Evans Waterless Coolant. It is without question one of the best and simplest upgrades you could make.

Also replace your intake throttle body boots with silicone reducers.

My guess is that someone scavenged the headers off yours.



Jose
1987 M6 - My dream car

brickwhite
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m635

Post by brickwhite » Wed Jul 09, 2014 3:07 pm

Looks to be a latter US S38 exhaust manifold, think the old euro header cracked and they replaced it with a US version? And a leaky valve cover.

Image
Last edited by brickwhite on Thu Jan 05, 2017 9:38 pm, edited 4 times in total.

Shipper 01
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Re: m635

Post by Shipper 01 » Wed Jul 09, 2014 11:22 pm

brickwhite wrote:Looks to be a latter US S38 Header, think the old euro header cracked and they replaced it with a US version?
That's the Euro head. The S38B35 head has the oil cap on the timing chain cover.

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Post by ericono » Thu Jul 10, 2014 1:43 am

Shipper,

"header" in American English means a tuned exhaust manifold from bent/welded tubing.

I don't remember what other nationalities call it.

Eric
'85 M635, '00 528iT, '98 Z3

brickwhite
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Re: 85 euro m6 - my new project

Post by brickwhite » Fri Feb 02, 2018 6:27 pm

Finally getting my parts together...


However one Snag...

SPROCKET EXHAUST 1 11311305394 NLA it has been superseded by dual chain sprocket.. 11311311816

That won't work.

Would anyone recommend just doing the guides and not the sprockets? Or just the intake and crank sprocket?

New intake on left, BMWs replacement exhaust sprocket on the right......

Image
- 12 535i
- 92 325ic
- 88 535is
- 85 M635csi

brickwhite
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Re: 85 euro m6 - my project

Post by brickwhite » Fri Feb 02, 2018 8:26 pm

Found one on ebay we'll see if it works...

https://www.ebay.com/itm/202208663839
- 12 535i
- 92 325ic
- 88 535is
- 85 M635csi

baders
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Re: 85 euro m6 - my project

Post by baders » Sat Feb 03, 2018 12:53 am

You can modify to accept the dual chain. In fact, it's highly recommended.
1986 635csi LOCUTUS / Arktis Blau Metallic / Pearl Beige / S38B36/ Close ratio dogleg 5sp
2002 E46 M3 / Topaz Blau Metallic / Black Nappa / 6 speed SMG software tuned / Bilstein PSS10 Coilovers

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