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Premium Member
1983 380 SL
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2,644 Posts
Discussion Starter #321
I gotta say....this thread beats my BenzyPalooza 2015 thread for continued adventure story plots.

Nothing can top the BenzyPalooza 2015 thread.
 

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Premium Member
1983 380 SL
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2,644 Posts
Discussion Starter #322
Cleaning up the pistons waiting for the rings to get here and I noticed a few things I had missed when they were covered in grease, oil and crud.

First... the number 4 rod bearing was pretty much shot. I didn't notice it until I cleaned it off.
Red arrow points to a piece of something that scratched a deep grove in the bearing.

MercNbr4RodBearing copy.jpg


I took the trouble to mark the pistons 1 thru 8 when I removed them...
MercPistonNbrs1.jpg

But after cleaning them up I noticed they were already marked with Roman Numerals.
This one is nbr 3 (red arrows). Nbr 4 piston was marked IV.

MercPistonNbrs2 copy.jpg

I've owned this car since new in '83. Apparently Mercedes marked the pistons as to which hole they go in.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,169 Posts
I think I saw similar markings on the '73 I rebuilt and '72 I dismantled. I'll try to remember to check out in the barn tomorrow. Maybe I can find the '72 pistons. I do remember they both had chrome-moly compression? rings and MB price was ridiculous.
 

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Premium Member
1983 380 SL
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2,644 Posts
Discussion Starter #324
I think I saw similar markings on the '73 I rebuilt and '72 I dismantled. I'll try to remember to check out in the barn tomorrow. Maybe I can find the '72 pistons. I do remember they both had chrome-moly compression? rings and MB price was ridiculous.
Yeah... I wanted to go with chrome-moly but it would have cost almost $600 just for the rings.
 

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Registered
1987 560 SL, 1990 300E 4Matic
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509 Posts
$600 for rings is ridiculous. MB is a crapshoot when it comes to parts prices. I recently paid the same amount for upper/lower W124 antenna seals at the dealer that I would have aftermarket. Yet other parts are much more expensive.
 

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Premium Member
1983 380 SL
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2,644 Posts
Discussion Starter #326
I've seen the rings for over $100 per set. Ridiculous. More reasonable price is between $30 and $40 per set.
 

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Premium Member
1983 380 SL
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2,644 Posts
Discussion Starter #327
Cleaning things reveals much that you couldn't see before cleaning.

Three of my pistons... 5,7,8 have the letters USA laser etched into the top of the piston. 1 thru 4 don't have it... that could be either because it's too faint for me to see, or the letters on 1 thru 4 were never there. Number 6 was too mutilated to tell one way or the other.

Either way, it appears that Germany used a separate (special?) set of pistons for USA 380's. Has anyone seen this before?

Red arrow points to the letters USA.
(note: I stopped cleaning this piston when I saw the letters USA. I did this so I could get this photo in case cleaning removed the letters... it didn't).

MercPistonUSA copy.jpg
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,169 Posts
Haven't seen it but it makes sense. 155 HP US verses 194-201 HP ROTW.
 

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Outstanding Contributor , Bob's Your Uncle!
-----'83 280 SL----- 5 speed....The PIG
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29,341 Posts
OK... I'll ask, I know what ROTW means but I don't know what each letter stands for?
As usual....There is USA and then there is ROTW.
And that's not just cars. :)
 

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Premium Member
1983 380 SL
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2,644 Posts
Discussion Starter #334 (Edited)
Rest of the world.
Oh... so it appears I didn't know what it meant here in BenzWorld. I already knew the common definition of ROTW, but I though in here it meant Country of Origin Specific. Like ROTW meant Euro or something like that. In retrospect I guess it did mean that because most 107's were built in Europe. I seem to remember some were built in Australia but that could be my mind remembering things that didn't happen.

Thanks
 

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Registered
1987 300SL
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31 Posts
No R107 models were built in Australia, Jyuma. Assembly of Mercedes cars in Port Melbourne occurred between 1959 and 1965. They built models W110, W111, W121, W128 and W180. They weren't up to German standards, however, and not many of the 6390 (ish) cars assembled now still exist
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,169 Posts
It is more of a market description. ROTW is more accurate than Euro because of markets other than Europe and USA. Some were assembled in East London, South Africa.
 

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Premium Member
1983 380 SL
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2,644 Posts
Discussion Starter #338
Looks like I'm screwed. I've placed orders for the last 2 sets of rings I need with 4 different suppliers and all 4 have failed to deliver. Looks like I have no choice but to spent almost $200 for the last 2 sets of rings.

Pelican kinda says the can get rings from Germany at like $100 bucks a piece. Damn I hate paying $100 bucks for something that's worth less than half of that. As it stands right now I've only got 6 sets of rings.
 

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Premium Member
1983 380 SL
Joined
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2,644 Posts
Discussion Starter #340
I tried RockAuto a few weeks ago but they couldn't deliver. However, at the time I was only considering Goetze. I'll try for the one.
Thanks
 
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