Routine maintenance... and some other things

190E 2.3-16, 190E 2.5-16, 190E Evolution 1 & 2 models
16v specific information.
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AMG
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Routine maintenance... and some other things

Post by AMG » Thu 11 Feb, 2016 1:46 pm

I've been pretty busy, and forgot to mention some things I did to the 201 before xmas.

Literally the day before I left for BrisVegas, I was parked in JG's workshop and giving Hermann the once over before the big haul north. I had not planned to execute any massive modifications or other changes to the vehicle, but took with me a few boxes of parts I'd purchased from John some (years?) earlier around the same time I was doing the 124's suspension.
The plan was to do fluids, check the SLS levelling valve (I thought it was leaking) and tighten / adjust everything - make it ship-shape for the round trip.

Without going into the boring details, I'll simply say that the fluids were changed, the trans didn't look fantastic, and the input shaft bearing is contributing to a whine, but It's not long for this earth - a teardown is planned very soon.

So everything actually looked OK, except for the levelling valve. I had a spare, but upon further inspection it appeared that the bracket and linkage had suffered a malfunction. I happened to have a new one of those too, and also just happened to have all the rear subframe bushes as well as a 22mm rear swaybar at hand, so the decision was made to drop the rear subframe and get cracking on changing out the necessary bits.

The subframe bushes were replaced with Ake's urethane ones (I have mentioned his gear before) and Clayton's 'gifted' custom 22mm rear bar went in, as well as Ake's adjustable heim jointed linkages and the rear subframe brace. New subframe bolts & washers etc and it was all stitched up in a couple of hours.
The vehicle was then re-levelled and test driven, before the SLS was flushed and the full range checked on the levelling valve. (which didn't need replacement after all)

Given the fact that I had a huge trip the following morning, I made a quicker than usual exit and drove home, making it there on dusk. Not bad, considering.

The car was then loaded up and I test drove it again to ensure the SLS was behaving. I got it back in the garage and had to adjust the linkage a little.

a few hours sleep and hit the highway. A stinking hot day, peaking at 42ºC at tamworth, and it wasn't any less at armidale, nor did it give much up at grafton either.
On the way, the HVAC blower developed the dreaded bearing squeal. at 40+ outside, you learn to live with those kind of noises... begrudgingly.

made it late in the evening, as many stops were made for the furry kids, and Otto was greatful for each escape from the confines of the back seat. Kaiser, not so much. He's like the child who gets carsick and suffers from anxiety attacks, so we are pretty mindful of that which is why it takes a couple of extra hours with them in the car.

Have to say that the rear bar and rear subframe brace have made a huge difference to the handling. It's very much an oversteer car now, very predictable on the Michelins, but it does get nervous right on the grip limit and it communicates this to you early enough so you either push it or back off knowing how the vehicle will react in either situation.

Then I made the decision while in BrisVegas to pull the blower motor out and clean it up.
The brushes were shot, primarily because the rhs pillow bearing had failed, allowing a radial runout greater than 2mm on the shaft. Knowing this means replacement unit, I couldn't obtain one before heading home I chose to clean it out and lube the bearings and hope it would last until I got home.

Well it worked better than expected. it took a whole month and a half before the brushes gave up and the commutator bridged. Luckily Nick had a spare in the 190e he was dismantling so I picked that up, stripped it down and cleaned it right up, relubed it and refitted it to Hermann. Result: As new. Until the replacement unit arrives.

not long after returning I also changed the hood pad, and cleaned up the air vents and other interior pieces. Things are starting to look better, but there are a few more items to look at.

The 16v has not been driven much, and the long trip certainly did help to give it a new lease on life. So while the gearbox is due for an overhaul, I'll take some time to do a bit more cleaning.

The adjustable arms and LCA bushes also need to be done, but there is no real hurry for that - I'd just like to get it done sooner than later. Parts have been sitting on shelves far too long and I need more space in my workshop...

stay tuned.
Current:
1987 560SL 4sp. auto Signalrot "Stella"
1987 190E 2.3-16 5sp. man. Blauschwarz "Hermann"
1992 300CE-24 6sp. man. Perlblau / Iceblau "Gretel"
1992 Range Rover Classic 4sp auto Ardennes Green "Oswald"
2012 E63 AMG Speedshift MCT Diamantweiß "Klaus"
Previous:
1986 560SEL Anthracitgrau "Schultz" - In Mercedes Heaven
1987 190E 2.6 4sp. auto Signalrot "Sabine" - which now resides/owns Andrew M's Garage
1972 350SLC Astralsilber "Lurch" - now in the loving care of Craig B
1989 2.5-16 Blauschwarz 4sp. auto (parted) formerly owned by Derek/Hasan.
2012 Renault Sport Megane RS265 Trophy 8:08 6 sp. man. Liquid Yellow "Jean Rédélé"

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Greg in Oz
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Re: Routine maintenance... and some other things

Post by Greg in Oz » Sat 13 Feb, 2016 11:30 pm

AMG wrote:...a few hours sleep and hit the highway. A stinking hot day, peaking at 42ºC at tamworth, and it wasn't any less at armidale, nor did it give much up at grafton either...
Tamworth? So you didn't take the opportunity to go via Bucketts Way and Thunderbolts Way? A missed opportunity in the Cossie. I've only ever done it in a fully laden 300TE but in the Cossie or even the 500SLC it would be a magic drive. Apart from the fun of the twisty bits there's the difficulty of avoiding the temptation to see what she'll do on the straights. Did try it once in the 300TE and was pretty impressed considering the full load and 1400m elevation.
107023 - 350SLC: 1973, 3sp auto, icon gold, parchment MBtex (sold July 2012 after 29 years ownership)
107026 - 500SLC: 1981, 4sp auto, thistle green, green velour
124090 - 300TE: 1990, 4sp auto, arctic white, cream-beige MBtex
124090 - 300TE: 1992, 4sp auto, malachite (spruce green), black MBtex
201024 - 190E-2.0: 1985, 5sp manual, black, black MBtex
201028 - 190E-2.3 Sportline: 1990, 5sp manual, arctic white, blue leather
201028 - 190E-2.3: 1992, 4sp auto, blueblack, grey MBtex
201028 - 190E-2.3 Sportline: 1990, 4sp auto, signal red, black cloth (parts car)
201034 - 190E-2.3-16 Cosworth: 1985, 5sp manual, blueblack, black leather
YG2S8 - Mini Clubman GT: 1972, 4sp manual, blue, parchment vinyl (my first car which I still own)

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AMG
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Re: Routine maintenance... and some other things

Post by AMG » Tue 07 Jun, 2016 1:15 pm

Nah, I'd actually made a mistake. It seems that due to the lack of sleep, I was on highway autopilot until I passed Singo. By then obviously too late to take the stroud/gloucester route that I like to.

Bucketts is bloody terrible- Have you driven it lately? it's an absolute disgrace of a road. The murwillumbah / kyogle road is better.... Nerriga rd is a billiard table by comparison. Bloomfield track would be a comfortable sunday afternoon drive (for those who've done it just after the wet has passed you'll understand the degree of sarcasm implied)..

Yeah, I was a bit slack. I came home through thunderbolts. I just really have to be in the mood for it though.

I'm taking the RRC up next time, and making a tour route. Plan is to take a couple of days, instead of the usual land speed record attempts. I'm getting old, fraile and fearing mortality.

Not really. It just seems that I have lost the desire to tackle these long trips. I used to do Brisbane to Melbourne with a quick 2 hr sleep and make it in 18 hours. Now it seems I can't do Syd-Bris in anything less than 15... I did it in 9 once (on a bike) and that included fuel food and toilet stops....

Age sure has a way of playing catch-up real fast. I am living in denial, of course. :D
Current:
1987 560SL 4sp. auto Signalrot "Stella"
1987 190E 2.3-16 5sp. man. Blauschwarz "Hermann"
1992 300CE-24 6sp. man. Perlblau / Iceblau "Gretel"
1992 Range Rover Classic 4sp auto Ardennes Green "Oswald"
2012 E63 AMG Speedshift MCT Diamantweiß "Klaus"
Previous:
1986 560SEL Anthracitgrau "Schultz" - In Mercedes Heaven
1987 190E 2.6 4sp. auto Signalrot "Sabine" - which now resides/owns Andrew M's Garage
1972 350SLC Astralsilber "Lurch" - now in the loving care of Craig B
1989 2.5-16 Blauschwarz 4sp. auto (parted) formerly owned by Derek/Hasan.
2012 Renault Sport Megane RS265 Trophy 8:08 6 sp. man. Liquid Yellow "Jean Rédélé"

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AMG
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Posts: 5748
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Re: Routine maintenance... and some other things

Post by AMG » Tue 07 Jun, 2016 2:22 pm

Well, I thought I'd add this little tidbit to the 'routine' maintenance

on Sunday, while it was pouring, I decided to pull the ignition system and give it a once over. Theory behind the work was to eliminate a randomly rough idle.

Now I know I'm due for a set of leads (good luck with finding plug ends all you 16v owners - it took me 2 months to get 4 plug caps and even at 'mates rates' the forum sponsor gives ozbenz members, it was still a bit to cop.... but what choice do you have? they are a one-off size, so either way, you're stuffed.

But - due to other circumstances, I have not yet been able to fabricate the leads. So while I had my suspicions about lead breakdown, I decided nonetheless to perform the other routine maintenance - i.e. clean distributor, relube, check play, cap / rotor / coil / ezl etc. Just the usual 'tune-up' stuff.

Knowing my idle and mixture settings were set 'correctly' (not within factory spec, but within 16v spec) I tended firstly to the distributor.

I was surprised at how much crud was residing under the plastic shield below the rotor.... so it got pulled and cleaned. But the socket screw had decided to weld itself to the threads in the block, so it took me a little while with some patience and inox..

Once out, I stripped the dizzy down and ckecked sideplay etc. Because there is essentially nothing in the housing other than a shaft, the process was very short. I reshimmed the shaft, gave the housing a CLA and reinstalled it. I had a new spare socket screw, and replaced that with sliver antisieze, to be sure.

The dizzy cap and rotor are serviceable, but have seen better days. One of the annoying issues with 16v's in that there are about 3 different rotor & cap combinations, and they are a matched set. So you need the early cap and rotor if your chassis says so. Unfortunately for me, that is the case. In fact, one of the strange things about my 16v, is the EZL is a very early part number, as are the distributor, cap and rotor, yet the car is a 1987 model. It just goes to show that MB obviously made batches of parts in small volumes for these cars, and some of those batches were smaller than others. It's also a constant source of frustration, because often it actually does mean a difference and not just a part number supercession. Like the chain tensioner..... but that is another story.

So I cleaned the cap and rotor, and reassembled. Everything goes well.

Start the car up and begin the process of checking vacuum, idle and timing. All good. Let it warm up and things sounded good. a couple of italian tune-up revs and I was set to call it mission complete.... until I spotted what I thought was a flash coming from the coil.

Because I had my worklight in a spot where the chances of reflection were minimal, I immediately thought, oh great, I've found the source of random lumpiness at idle. I thought the HT lead was arcing out. But it wasn't..... I waited patiently, repeated the static WOT rev and then I saw it again. The tiniest of blue sparks coming from the coil's inner facing insulated surfaces. It was internally arcing to the core!

Now this is the first time I've seen physical evidence of a mercedes-benz ignition coil internally arcing. I know they occasionally fail, or break down and the resistance is a telltale, but there was no issue with primary resistance in the coil I had fitted. In fact, it was a replacement from some 12 months ago, when I first felt the issue occur.

So here's a sideline... The coil I used to replace the original 16v coil was a spare from my m117 5.6 - They are rated almost identically, but there are physical differences - those being that the primary terminals and HT terminal are on opposite sides. I had a spare from my m104.980 as well, and it was identical to the m117 coil physically.

The coil from the v8 worked perfectly well. in fact I did not think that the arcing issue I had just discovered actually contributed to the idle issue in any significant way. After all, the breakdown was only at idle rpm's and was so infrequently intermittent, that you feasibly could have kept on going without knowing it to be a problem for quite a while, because as soon as the car gets warm and you're driving, there is actually no stumble or misfire.... I was heavily weighing on the fact that I knew leads, cap and rotor were due, and that the random lump was an idle air control thing, even moreso than a dodgy lead....

Obviously this discovery meant I needed to source another coil. So I replaced the v8 one with the 16v one I had removed previously. Et voila - the random idle stumble is gone.

So while Coils ain't Coils, they certainly do breakdown across the core internally, and I'll be buggered if there aren't dozens of MB's out there right now with the same almost undetectable fault. Given that I just happened to be looking in exactly the right place, at the correct angle and with the correct amount of light, I'd say there is actually a quite decent probability that there are quite a few even well-maintained cars out there with an identical problem.

The only thing that annoys me, is that the 16v coil has it's terminals on the opposite side. So I'm going to get another V8 one and see how that goes, before dropping a bombshell on a 16v specific part, when it is only a terminal location difference on the part itself, easily overcome by rerouting the cables to the coil.

(Yes, I checked the coil specifications, the internal windings are the same!)


I'll naturally be much happier once I've made the new leads and fitted new cap, rotor and coil. But the car is running great as it is, which for a 16v owner - is something you learn to not disturb... unless you like your bank balance wiped out in half a second.
:laughing6:
Current:
1987 560SL 4sp. auto Signalrot "Stella"
1987 190E 2.3-16 5sp. man. Blauschwarz "Hermann"
1992 300CE-24 6sp. man. Perlblau / Iceblau "Gretel"
1992 Range Rover Classic 4sp auto Ardennes Green "Oswald"
2012 E63 AMG Speedshift MCT Diamantweiß "Klaus"
Previous:
1986 560SEL Anthracitgrau "Schultz" - In Mercedes Heaven
1987 190E 2.6 4sp. auto Signalrot "Sabine" - which now resides/owns Andrew M's Garage
1972 350SLC Astralsilber "Lurch" - now in the loving care of Craig B
1989 2.5-16 Blauschwarz 4sp. auto (parted) formerly owned by Derek/Hasan.
2012 Renault Sport Megane RS265 Trophy 8:08 6 sp. man. Liquid Yellow "Jean Rédélé"

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T-Modell
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Re: Routine maintenance... and some other things

Post by T-Modell » Tue 07 Jun, 2016 5:22 pm

AMG wrote:... I'm getting old, fraile and fearing mortality.

Not really. It just seems that I have lost the desire to tackle these long trips. I used to do Brisbane to Melbourne with a quick 2 hr sleep and make it in 18 hours. Now it seems I can't do Syd-Bris in anything less than 15... I did it in 9 once (on a bike) and that included fuel food and toilet stops....

Age sure has a way of playing catch-up real fast. I am living in denial, of course. :D
Ah come on ... this phase will pass! :laughing6: ... been on a long business trip the last two weeks and Saturday morning I had to drive back from Berlin (600kms) ... I didn't make it in under 4 hrs as I was stuck in a traffic jam around Frankfurt for 15 mins ... so I started at 08:00 and arrived at home at 12:15 :laughing6: :laughing6:

Never ever give up!
Thomas
---------------------------------------------------------------
1967 W111 250SE Cabriolet, horizon blue
1973 W115 220D 5.0 Pick-Up Argentina, work in progress 2017/18/19
1986 R107 500SL, arctic white, the midlife crisis viagra replacement
2007 R171 SLK350, calcit white
2008 S211 E63T, calcit white, sleeper

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