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#1
10-24-2006, 10:08 PM
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Engine Performance Tuning checklist
If you just picked up a "junker", in what order would you begin to get the engine running back in prime condition?
Here's my starter list: 1. New fuel filters 2. Purge Valves Adjust throttle linkages Banjo bolts Italian Tune Up Rack bolt Alda What else, or what do you think I have out of order of priority? Please keep this engine related ONLY!
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Paul 2004 E500 4matic; 72,000mi 
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#2
10-24-2006, 10:15 PM
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Oil change!!!
Cooling system flush Power Steering flush & filter change (Not really part of the engine, but it's right there) Degrease Vacuum & fuel hoses Valve cover gasket after messing with valves Air cleaner bracket & hardware If it's a turbo - seals on the u-hose Exhaust gaskets Battery
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1984 300TD
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#3
10-24-2006, 10:39 PM
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What about adjusting the valves, checking the timing chain, and checking the IP timing? I would also check the compression (after adjusting the valves) before spending too much money on other things.
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#4
10-24-2006, 10:50 PM
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Ok:
New fuel filters / --> fuel hoses Purge Valves/ -->timing chain Adjust throttle linkages Banjo bolts Italian Tune Up --> IP timing Rack bolt Alda Old Pokey: Sorry, I"m going to reject some of yours, since I'm principally interested in performance, not general maintainance. Let pretend the car is in perfectly maintained, imaculate condition, but the engine is just rough. So that's not a "junker." I know...
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Paul 2004 E500 4matic; 72,000mi
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#5
10-25-2006, 03:23 AM
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My 2 cents.
Fuel filters, main and in line. Look for algae evidence. ( black colored fuel) Fuel lines, look for leaks/cracks/damage and replace Valve adjustment. Check timing chain stretch while there. Diesel purge/ injector cleaner ( Techron). Oil/filter change. Air filter change, if necessary. (check air filter mounts) Replace the following filters, Power steering. (change the fluid initially to the same fluid. Going from ATF to power steering fluid ( or vis a versa) may produce leaks in the system). SLS suspension filter in the reservoir tank (TD only). Tranny fluid/filter change. Check Air Conditioner charge. Check charging system. Vacuum line connectors and condition. Replace connectors if old/cracked. Antifreeze, Change to Mercedes. Engine/ Tranny mounts and shocks. Check condition. Check front and rear suspension condition. Entire vacuum system check. Engine/door locks/Air Conditioning system Wash and wax the girl. Enjoy  Dave
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1970 220D, owned 1980-1990 1980 240D, owned 1990-1992 1982 300TD, owned 1992-1993 1986 300SDL, owned 1993-2004 1999 E300, owned 1999-2003 1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD 1988 560SL, 100,000mi, owned since 1995 1965 Mustang Fastback Mileage Unknown(My sons) 1983 240D, 176,000mi (My daughers) owned since 2004 2007 Honda Accord EX-L I4 auto, the new daily driver 1985 300D 264,000mi Son's new daily driver.(sold) 2008 Hyundai Tiberon. Daughters new car
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#7
10-25-2006, 04:05 AM
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Do a search for algae or fungus.
http://www.peachparts.com/shopforum/search.php?searchid=951581 http://www.peachparts.com/Wikka/W123FuelTank Dave
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1970 220D, owned 1980-1990 1980 240D, owned 1990-1992 1982 300TD, owned 1992-1993 1986 300SDL, owned 1993-2004 1999 E300, owned 1999-2003 1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD 1988 560SL, 100,000mi, owned since 1995 1965 Mustang Fastback Mileage Unknown(My sons) 1983 240D, 176,000mi (My daughers) owned since 2004 2007 Honda Accord EX-L I4 auto, the new daily driver 1985 300D 264,000mi Son's new daily driver.(sold) 2008 Hyundai Tiberon. Daughters new car
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#8
10-25-2006, 12:02 PM
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Check your boost pressure too
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green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday  )(  Kalifornistani emissons  )white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank) desert storm primer 63 T-bird "The Undead" (long term hibernation) http://ecomodder.com/forum/fe-graphs/sig692a.png
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#9
10-25-2006, 12:09 PM
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OIL first
then add belts condition to the list.
then add hoses John
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#10
11-01-2006, 05:49 PM
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ConnClark-
pressure check after alda adjustment, right?
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Paul 2004 E500 4matic; 72,000mi
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