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#1
03-02-2003, 03:50 PM
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Just a little tip from my MB mechanic
Hello Folks,
I will be the first to admit that I am not to brightest crayon in the box but I wanted to share a tip that my indepedent MB mechanic gave me last week. Everyone here probably knows this, except me, but here it goes! I am planning on putting a set of valve seals in my 240D and he was giving me some pointers on it and said to be careful not to drop a valve down into the cylinder, of course, but said if I do then I could easily retrieve it with a small pencil type magnet (the extending kind). He said that there have been times when he has accidentally dropped a valve and been able to "fish" it back up with one of these magnets. He said that most times the valve will land flat on its head therefore leaving the stem sticking straight up to "grab". He said it's easier than removing the head. That's a no-brainer! Like I said, I am not the brightest crayon in the box but maybe this is a good tip, maybe not. honestly, I hope I never have to find out!  :p Oilslick 
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#2
03-02-2003, 03:56 PM
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If HIS crayon was SHARP, He would turn each Cyl to T.D.C before removing the valve spring to replace the seal. With the piston at TDC, the valve can't fall at all.
__________________
My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.
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#3
03-02-2003, 04:24 PM
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Yeah, your right!
Well, the rest of us make mistakes and accidents do happen. Glad you have the process down real good.
I'll pass your information along to my mechanic. I am sure, since he has made a living at this exclusively with MB for over 40 years, he will be glad to know that. Oilslick 
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#4
03-02-2003, 04:55 PM
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You might ought to just keep that info to yourself.. because he is going to be really embarrassed when he thinks about it... LOL..it can just be yours and our secret....
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#5
03-02-2003, 05:02 PM
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On putting those seals on.. be sure to use ( or find ) the plastic protective deals over the top of the valve while installing... so you don't screw up your sealing surface forcing it over the threads on the valve...
One set I had did not have them... but I saw it mentioned in the shop manual... the next set I bought had them in there....
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#6
03-02-2003, 06:09 PM
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Leathermangs right.... dont forget to use the valve "condoms" or your crayon wont stay sharp.
I think a DIYer would turn the engine over as the valves are "turned lose" to keep the piston high, know I would.
__________________
 1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" Last edited by Stevo; 03-02-2003 at 06:20 PM.
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#7
03-03-2003, 08:33 AM
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In gassers, just take out the plug and shove rope into the cylinder. Not sure if that is applicable in a diesel. I haven't had one apart in 15 years.
__________________
Michael LaFleur '05 E320 CDI - 86,000 miles '86 300SDL - 360,000 miles '85 300SD - 150,000 miles (sold) '89 190D - 120,000 miles (sold) '85 300SD - 317,000 miles (sold) '98 ML320 - 270,000 miles (sold) '75 300D - 170,000 miles (sold) '83 Harley Davidson FLTC (Broken again) :-( '61 Plymouth Valiant - 60k mikes 2004 Papillon (Oliver) 2005 Tzitzu (Griffon) 2009 Welsh Corgi (Buba) 
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#8
03-03-2003, 12:26 PM
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Michael, That is a wonderful trick on gas engines....particularly on small engines where holding on either end is often hard.... but the diesel piston goes incredibly close to the valves so it is really easy to use it for valve holding....
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