Has anyone used anything but the expensive flywheel stretch bolts on an OM617?

The OM606 only use 8, and my big domestic v8 only uses 6.

Was this just another example of over-engineering?

$120 for flywheel bolts is a hard pill to swallow.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

I re-used mine 8k or so miles ago.

I think the FSM has length and diameter numbers listed to determine if they are out of spec for use.

This thread Flywheel bolt size + Tightening torque references 616 flywheel bolts. I used 616 manual flywheel bolts to connect the 300D flywheel to my 617.

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Old Blue - 83 240D 6 speed manual trans, OM648
Green Machine - 2001 Europa G500
87 300SDL Bought on Peachparts. Low-ish miles..?

Family Truckster - 2012 VW Touareg TDI

Patchouli Wagon - 2004 E500 - SOLD
333k mile 97 BMW 750il V12. - SOLD
The Californian - 85 300TD - SOLD
Daily Super Sedan - 03 Audi S8 -SOLD

Something few people realise, same with head bolts. Out of 24 (multiple use) bolts I had between 2 engines, only 4 were not good according to the above specs. Just remember manual and flex plate bolts are different.

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1978 300D, 373,000km 617.912, 711.113 5 speed, 7.5mm superpump, HX30W turbo...many, many years in the making....
1977 280> 300D - 500,000km+ (to be sold...)
1984 240TD>300TD 121,000 miles, *gone*
1977 250 parts car
1988 Toyota Corona 2.0D *gone*
1975 FJ45>HJ45
1981 200>240D (to be sold...)
1999 Hyundai Lantra 1.6 *gone*
1980s Lansing Bagnall FOER 5.2 Forklift (the Mk2 engine hoist)
2001 Holden Rodeo 4JB1T 2WD

I re used in 2013, and they outlasted the body. As above, read the reuse guidance in the manual.

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CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times

It's hard to

more likely to

concentrate on

have an accident

two things

when you're on

at the same time.

a cell phone.

www.kiva.org It's not like there's anything wrong with feeling good, is there?

I used socket head cap screws from Fastenal due to my unique application and having to put a Toyota manual flywheel on a 617 with a spacer.

It has also been removed and re-installed. No issues.

Edit: I also used blue Loctite.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

I'm aware of the stretch specs, but thanks for the link.

The trouble is, I don't have any Mercedes bolts at all. I usually don't cheap out, but when the flywheel bolts cost more than the transmission....

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

I probably have some, but they are not marked so I'd need dimensions to get the right ones. If you can provide dimensions I believe I can provide bolts.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Anything available from junkyards that keep engines around?


What about the Peach parts community?

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Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6

Don't have time for junkyard runs right now, and I haven't seen a w123 in years.

I'll probably just throw the $15 McMaster bolts in. 12 seems like a crazy amount of overkill. SBC flywheels are about the same weight and have only 6 bolts.

EDIT:
Looks like ARP has these guys, 1mm short but they might work:
Ford Pinto 2000cc M10, 6 pieces
Kit #: 151-2801
($44/kit)

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

I think my bolts were in the ~$70 range.

Are you sure the factory bolts are TTY? I remember the specs being crazy low, 30ft lbs or something.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

From the FSM....



Thread dia. D M 10x 1
when new 7.7-0.2
Necked-down stem dia. d minimum dia. 7.3
Length L 31

Tightening torques
Initial torque 30-40 Nm
Angle of rotation torque 90-100°

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

OK, 30NM is 22ft lbs. Yeah crazy low.

I never did the +90deg, wouldn't matter as my replacement bolts weren't TTY. Interesting stuff. Nearly 40k miles now, no issues.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

The spec is not 30 nm. It is 30nm + 90 degrees. The end result is a final torque that is much higher than 30 nm. If you are replacing the hardware with non-TTY, and you only torqued to 30 nm, your bolts are way under-torqued. The purpose of the +90 degrees is not to stretch the bolts, it is to reach the desired torque value with TTY hardware. With non-TTY hardware you still need to reach the target torque, which is something higher than 30 nm...

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1998 E300 turbodiesel

America's Rights and Freedoms Are Not The Enemy!

Yep, aware of all that. The spec I saw and followed was 30nm......and that's it. No +90 deg was mentioned anywhere so I didn't do it.

Yes my bolts are seriously under torqued. Nearly 40k miles and zero trouble later.......

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

The FSM for the OM617 turbo engine has on the first page of procedure 03-410 the torque specs, there are two. Initial torque (30-40 Nm) and then angle of rotation torque (90-100 deg).

Did you use the directions for your flywheel instead? Toyota specs? I think you should have used the MB FSM specs, glad you made it this far with no issues.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC