Wollte gestern in aller Ruhe an meinem Evo weiterschrauben als mich mein Kumpel nachts anrief. Sein Rüf 2,3-16 hatte schlagartig keinen Öldruck mehr! Zum Glück hat er es rechtzeitig gemerkt und den Motor abgestellt.Die Kiste wurde vom ADAC abgeschleppt

Dann mal an die Arbeit
Öldruckgeber getauscht, nix Also Ölwanne runter und geguckt, nix,

dann Steuergehäuse runter(Mit Klima absolute Drecksarbeit)doch wieder Nix,
doch da war doch der Hund begraben. DAS VERFLIXTE ÜBERDRUCKVENTIL DER ÖLPUMPE HAT FESTGEKLEMMT!!!!Die Pumpe konnte keinen druck aufbauen
UNGLAUBLICH; WIE KANN SO EIN MIST NUR PASSIEREN??? werde das morgen mit der reibahle gängig machen. Hat jemand schon mal diesen Fehler gehabt oder ist das hier mal die ausnahme?
Bei der ganzen Arbeit haben wir dann noch schnell den Kopf runtergeschraubt und noch ein Verbranntes gerissenes Auslassventil entdeckt! komischerweise hat sich der Motor das nie anmerken lassen,denn er lief immer sehr kultiviert!
So ich hoffe jetzt haben wir wieder ein bisschen Gesprächsstoff die nächsten Tage. Ich hab ihn denn mein Kumpel ist wegen der Sache ganz schön angep.... und hat langsam die Lust am 16V fahren verloren. Dabei arbeitet er selbst bei DC in der Werkstatt. Tzzz...

Also der Riss ist am rand nur ca 2-3mm lang. Soviel kompression wird er dadurch nicht verloren haben.Der Motor ist allgemein ziemlich am Ende. Das Kolbenspiel erinnert mich negativ an meinen Evo2. Da konnte man auch das Stoßspiel von oben messen so ausgeleiert wie die waren. Das Hohnbild ist in der Mitte quer zum Bolzen nicht mehr vorhanden.
Mein Evo hatte damals auf dem 4.Topf nur 8,5 bar, hat sich das im Leerlauf auch nicht unbedingt anmerken lassen. Doch das ist geschichte

As stated,the oilpump of our engines is driven by the crankshaft(kurbelwelle).
A commonly adressed problem with the setup is that the pressure relief valve gets stuck over time.

Easy enough to remedy,as the valve per se can be axcessed from the outside of the engine.
When this occurs it doesn´t have to show at the oilpressure gauge inside the car at all.
What takes damage at first is normally the No4 connecting rod bearing-as it is the last large bearing surface to get oil.

What to do then?
Well...
If i´d lost ALL oilpressure the bearings truly needs to be inspected.
To do so you need to get the car on a lift/hoist.
Drain all oil,and dismantle the two bolts that go through the subframe to hold the engine in place.
Then basically unbolt and drop the pan(a LOT of M6 bolts and a few M8s)
Use a piece of wood underside the pan and a transmission lift to rise the engine in the engine bay as fara as you can.
Using CAUTION place something between the fram and the engine mounts.
having raised the engine as far as it´ll go it is now possible to "puzzle" the oilpan out of there without taking the entire engine out.
The oil pickup tube u simply bend out of harms way after losening the M8 bolt that holds its lower part to the bracket.

Unbolt the No4 connection rod cap and inspect the bearing.
If worn...yeah well.

As far as the pressure relief valve in the pump.
This is held in place by an 8mm allen plug i believe.
Unbolt,and use a piece of wood or similar SOFT material to retrieve the pressure relief spring and plunger.
Plunger might VERY well be stuck,or kink,in it´s bore.
Having taken the plunger out inspect it.
If it looks ok,they usually do,the damage is to the bore.
Use FINE valve lapping paste on the plunger and some sort of rod or similar to insert into the plunger.
Put it all back in place and grind away...
Do so until you feel that the plunger moves freely within it´s bore.
Yes,you have now increased the diameter of the bore slightly,but trust me...it won´t matter one jota seing the overcapacity of the pump.

Clean the bore with some degreaser and a brittle gun brush.
Do same to plunger.
Clean both bore and plunger with a lint free cloth.
Do so over and over until cloth comes out clean.

Reinstall in reverse of above.


This,by all means,is a fairly common problem with mercedes engines btw.

Hi all bearings were ok! We have got poil pressure again. The car runs without problems now and my friend is very happy. But it was hard work. if someone wants to see the damageed exhaust valve i will show you some pics.
Thank you for your support!

Glad to hear.
What was the problem?

it was the pressure relief valve. the car runws since a week without any problems. my friend is very glad about it. Now we drive with 2 16Valvers around through Germany...... That wasn´t always like that.
Bye! Thank you!

Anytime...

When i first got into 16Vs(about a yr ago) i tried n seek out info.
It was more or less none existant-much to my surprise.

What i´m currently doing is adopting the engine to a fairly large turbocharger.A garret super T70.
Have also constructed a new intake for turbo use where we´ve adopted some of the tech from the IMSA Audis.(Diffusor eqipped turbo intake)

Meanwhile i tossed another 2,3-16 in there that i picked up,and as usual...the electronic side of the KE-jet left something to be desired.
What struck me at first was that mercedes and Bosch obviously tossed around all of the wiring between the early and late 16Vs at the ECU.
(Mine is an 85 vintage,and the engine i picked up is a late 86)
Having solved that..she runs great tho.
Going to use a stand alone EFI that one of my close friends have been involved heavily in developing.The VEMS(versatile engine management system)
Shooting to reach an honest 450ps reliably at just over 1 bar boost.

To give you an idea....
A guy by the name of Kjell up here in Sweden was heavily into dragracing and turbo back in the late 80s...
He eventually turned to the 2,3-16 by pure chance..
Turbocharged it the heavy duty way.
Put it into a rail chassis with a body from a chevrolet vega.
This was back in 1989.
He ran a 7,8 with a 330 km/h trap..

That...my dear friends...translates into that the little minescule POS Mercedes engine developed approx 1400ps... at full boost..

Way before the advent of programable EFIs and god knows what..
Gives you an idea of the potential of the little engine..

Btw...
Feel free to reply in german if that´s more convenient to you.
Used to live outside of Hamburg for a yr and a half as a teenager.
In other words,i understand german perfectly well-just have a harder time writing it.

i have got no problems to write in english. At this way i couldn´t forget it. But the administrator and the other club members doesn´t like our thread about more Horsepowers and tuning of the 16 valvers. its an exciting theme but not here. I made bad expieriences with it. perhaps we should create a new website for that. This site is only for keeping this cars original. i like tuning too, but thats the reason why i´m the bad boy here now. At this club ,tuning beginns with replacing the orange turn lamps against white ones. If you like to write about it, then only with the PN-Box system.

Greetings, Steffen

Ok.
I hear ya on that.
No problem,and i hope to god they never get to see my creations in that case .(Latest setup will hopefully reach the 600hp mark on a super T70 charger and VEMS efi)
But,it´s their site-and i respect that.
Just came here to swap information.
Hope none took offense.
..and as far as i can see it the knowledge as far as what might be wrong with an OEM setup doesn´t really mandate that the engine needs to be hotrodded.
But hey..that´s just me,and i sincerly apologize if anyone took offense for me asking the questions i´ve done.

Not to excuse myself,but i´ve also always thought of the racing heritage of the 16Vs?
Well,whatever...

As far as hotrod 16V sites,there´s always 190 rev around.
..and what´s more is that quite currently the scandinavian counterpart- mbsca.com - has been setup.

Feel free to register there Steffen,and have in mind that most people around scandinavia most def speak english-and some of us even german...*LOL*

If ya wanna reach me try a mail at
hrt692@hotmail.com
I happen to fool around a LOT with the regions 16Vs,and what´s more is that the pile of spares is building up fast-if there happends to be anything hotrod asf that you need.

Cheers,and well met.

Jesper

Schön geschrieben Frank!!!!
Ohne Witz jetzt. Respekt!!!
Ohne nur einen Hauch diskriminierend zu sein...
und gutes Englisch obendrein!!!....

As Steffen put it...
I for one am full of respect for that.

I´d like to clearify on a couple of things though if that´s alright.

First of all i´m in it for the speed.
Always have been,always will be.
Run a pro shop up here in Sweden where we specialize in race and vintage cars only.Have a past in professional formula racing where i toured europe and south america etc.
Restoring and rebuilding in my own shop since a little more than 10 yrs.
For instance...
Last yr we completed one of the more "the sky´s the limit" kinda a restos of a 60 vintage 190SL convertible that i´ve ever been into.
Approx 400´DM later..
Hysterical in a word.
Anyways,what i´m trying to point out is that i for one am as into stock restos as conversions.

To give you an idea..
home.swipnet.se/mechanixracing/daily.jpg
My 1284hp street legal monster i guess..*LOL*,and i keep 4 of them all in all .

Guess some of the difference in view lies in that up here we´re allowed to convert more on our cars legally than you guys are.( No TUV asf).Laws are much more "allowing" around here in short.

I appreciate what you´re saying as far as the 16Vs in pristine condition are becoming more rare than a hens teeth.

On the other hand,as far as i see it, this here with the internet comes down to sharing information and in doing so it doesn´t really matter what you use your car for.
Some of my customers use their 16Vs- by which some really ARE in pristine condition-for the occasional race track happening.I really think that´s going with the original idea of the car.

My own car for instance..
It´s a 201.034 that checked out from mercedes in early 85.Still got the original invoice for it even.
Apart from the engine mods,and some chassis mods,the car´s still the way mercedes intended it.Easy enough to put back into a complete stocker again.
Not gonna use this one for racing-have enough of those cars as is-but more trying to build along the line of the OEM mercedes thought-at least as i see it.
Build along the racing heritage if you want,and as such making it an even faster roadracer then it already is.

What´s my point here then?
Well,i run into the same problems the OEM crowd does in a lot of senses.
Ie for instance;the stuck oilpressure relief valve.
As one dives into the engines one soon also realizes the differences in yr models asf.
I also happen to know a thing or two when it comes to the fabled K and KE-jetronic,something the "OEM" crowd also have trouble with from time to time.
Or...how the driveshaft needs to be serviced from time to time-as they indeed do.Rears that needs overhaul...
And so forth.
See my point?

If you´d still like me around,i´d be more than happy to comply and keep my end to the stock stuff.
No problem.

The thing is...
Sharing info.
I-as well as you guys-run into the occasional stuck drivers side power window(or what have you),and what i dont´t know-one of you guys might very well.Likewise the other way around.
See what i´m getting at?

What i´m asking is if it would be alright to keep it on a level where we respect both ends-and keep sharing info.

Then...
There´s always the mods that i know that even the purist can adhere to.
I mean...the basic idea of our cars is that they´re fun!!!
To drive,to own.Right?

Okey...
What doesn´t show...
In my book the 201.034 is an enthusiast car these days.
Okey.

Then even some of the purist could adhere to;
How to make a mod that won´t show,but surely would make the car more fun to drive.
On the KE-jet there´s a electro hydraulic activator on the fuel distributor.
A little black thingy that controls the dampening pressure ontop of the metering unit.
Mercedes once had to comply to federal regulations as far as pollutions asf for different markets.
We-as enthusiast-don´t in the same way.
Hidden on the backside/flipside of said EHA there´s a brass plug.
If one unbolts that plug there´s a 2mm allen screw underneath.
Turn said screw 1/4 of a turn in...and reinstall plug as well as EHA back on metering unit.
Presto.
You´ve got yourself a stocker with better throttle response :]
Such a mod for instance...who would know?

See my point?
No real harm,and easy enough to readjust-and instantly a more fun car to drive.

Frank.
In short.
Thank you.
Then i believe we´re on the same level,and it´s all good in my book.
..and as such...back to business. ..and a readjust to the german language i guess .
For all i know,i sincerly hope that you can ALL appreciate that i indeed understand german perfectly well,just that i don´t write it as well.
Something that might change over time being amongst this community*LOL*.

Speaking of OEM(OEm btw for those that are not into english means Original Equipment manufacture) and speaking of what can be done...
Looked into the OEM specs of the 2.3 cams today.
Turned out that the OEM mercedes specs turned in at;
199deg intake and 198 deg exhaust@2mm valve lift at an installed lobe centerline of a 109 deg plus...
Something to ponder...for speedfreaks like me;)

Altho the URL is down at the moment,i´ll be happy to link some pics to the progress of my build up.
Lets just say...you can expect one seriously fast 16V shortly...hitting germany..for fun .
(Planing to vacate the next couple of weeks with my better half in northern germany.Lubeck to be more exact)

Speaking of which...
Yes.
That is a 69RS camaro.
Built up as what´s known as a "pro-streeter".
Legal...or at least quasi legal .
Sports a injected and nitroused 495cid chevrolet bigblock these days.(More or less exactly 8 liters worth to us).
Runs an EFI-an old Haltech F9A-8 in beta form that i got at one time for evaluation on a modified 65mm butterfly Hilborn.
A manual automatic.. Meaning it has a manual valve body and what´s known as a transbrake.Stall speed is@5000rpms.
A completely remodeled rear -a prism welded 9" ford with a 4.11 numerical and lim slip set to 240lbs-on a 4 link suspension.
In other words...not all that much camaro left .
So far best ET down the 1320 feet of race track in full street legal trim is 8,63@259km/h.
Weighs in at 1710 kg.

Run that one...as well as a equally insane 71 Z28,a stock 69 Z28,a 73 Q code Mustang cobra,an old ferrari 246 dino and a couple of suzuki tripples as well as the merc...to give you an idea...