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#1
02-04-2003, 07:55 PM
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280SEL Mechanical Advance?
My mechanic informed me that the distributor on the '73 4.5 is not getting the full advance at approx. 3500 RPMS. He said it was about 25 degrees advanced. Then he set the timing to 0 degrees to help it out a little. He gave me an old junker distributor to pull apart so I could see the the flyweights and get ideas to fix mine. I did so on the old one, saw how it works but haven't done anything to mine. I don't have a timing light or dwell meter so I cant take it apart to see what's up.
I'm wondering if anyone has come across this problem before and knows what might be up. I'm having him take a look at it in a couple of weeks cause it also has a crappy hot idle and the cold idle is a little rough too. It has new plugs, wires, points and timing and dwell have been set. Oh just thought i'd mention that this mechanic is really cool. He fixed my 76' 300D which had been set one tooth off on the timing chain AND had the cam gear on backwards by another mechanic. He was going to do it for free but I insisted on paying him half an hour.
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63 220S W111 76 300D W115 2013 VW JSW TDI M6 previously- 73 280 SEL 4.5 86 300E 5 speed 2010 VW Jetta TDI M6 
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#2
02-05-2003, 06:04 AM
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Joshol,
Can a friend of mine get this guys opinion on a noise he is having in his engine? We are both in San Jose. Just a diagnosis and pay for a half hour?
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Ed 1981 300CD (Benzina) 1968 250 S (Gina) 266,000 miles! 1983 Alfa Romeo GTV6 (Guido) 1976 Jaguar XJS-saved a V-12 from the chevy curse, what a great engine! 1988 Cadillac Eldorado (better car than you might think!) 1988 Yamaha Venture (better than a Wing!) 1977 Suzuki GS750B 1976 Yamaha XS 650 (sold) 1991 Suzuki GSX1100G (Shafty Gixser) 1981 Yamaha VX920RH (Euro "Virago") Solex Moped 1975 Dodge P/U camper "Time spent in the company of a cat, a beer, and this forum, is not time wasted!"
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#3
02-05-2003, 06:05 AM
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FWIW, I am fond of cleaning these weight pivots and the plate it rubs on, then greasing them with silicone grease.
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Ed 1981 300CD (Benzina) 1968 250 S (Gina) 266,000 miles! 1983 Alfa Romeo GTV6 (Guido) 1976 Jaguar XJS-saved a V-12 from the chevy curse, what a great engine! 1988 Cadillac Eldorado (better car than you might think!) 1988 Yamaha Venture (better than a Wing!) 1977 Suzuki GS750B 1976 Yamaha XS 650 (sold) 1991 Suzuki GSX1100G (Shafty Gixser) 1981 Yamaha VX920RH (Euro "Virago") Solex Moped 1975 Dodge P/U camper "Time spent in the company of a cat, a beer, and this forum, is not time wasted!"
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#4
02-05-2003, 11:26 AM
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Hey 240Ed, I can email you the shops number, but no promises on the shop rate!
I've been going to the shop for many years and have bought them many a beer.
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63 220S W111 76 300D W115 2013 VW JSW TDI M6 previously- 73 280 SEL 4.5 86 300E 5 speed 2010 VW Jetta TDI M6
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#5
02-05-2003, 07:53 PM
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joshol:
Factory spec is 19-22 degrees at 3000 rpm, 23-27 degrees at 4000 rpm. You should be fine. Proper static timing is 7 degrees BTDC at cranking speed, in case the vac retard is screwy. Maker CERTAIN the timing is set to either 7 BTDC WITHOUT vac or 5 ATDC WITH vac, the "advance" retards the timing at idle for emissions control, it doesn't advance the timing at all. Rough idle can be pooped injectors, or more likely, a vacuum leak. Places to check are the intake manifold seals between the top and bottom halves, the vacuum lock system, and the vac modulator on the tranny. They will all cause idle problems. The trigger points in the bottom of the distributor can give you fits with idle, too, along with surging and delayed throttle response -- take them out and clean them when you have your mechanic set the timing back to spec (you ARE using only good premium, right?). You may also need to have the idle and running mixture checked -- this requires a CO meter and some time...... Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#6
02-19-2003, 12:45 AM
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BUSTED!
Peter, how did you know I was putting in the occasional tank of mid-grade!?  I did buy the thing for $500 dollars ya know, does that make a difference? BTW, the local genius is working on the car and I'll let you know what he finds. Funny thing is he insists that the advance should be mid 30s and he knows these things like bread knows butter. I do need to adjust the valves, I think that would help. Haven't performed that job before so I think this is a good car to learn on. 
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63 220S W111 76 300D W115 2013 VW JSW TDI M6 previously- 73 280 SEL 4.5 86 300E 5 speed 2010 VW Jetta TDI M6
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#7
02-19-2003, 07:31 PM
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With the appetite these things have for fuel, who hasn't tried midgrade?
Besides, mine starts MUCH better on midgrade, and gets better milage, too. Factory training manual lists the advance times I show -- the older sixes have more advance, by the way, as does the pre 72 3.5/4.5. Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#8
02-20-2003, 12:26 PM
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Randy Durrance, a long time poster with mercedesshop.com and other MB web sites, has a very informative web site concerning MB distributors. It is : http://www.durranceeng.com . He has been ill and may not be able to answer your direct questions, but the man sure knows his distributors!! Anyone have an update on how Randy is doing?
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#9
02-20-2003, 10:48 PM
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It's back.
The plates with the flyweights were all rusted up and stuck. Now It feels like it has more snarl. It sounds smoother, I could only imagine what a Really nice 4.5 sounds like. This one was left to decay after a certain point but someone attempted to restore certain things here and there. I'm lucky it runs as well as it does. So Psfred, I'm thinking that the advance is around 22 but thats including the 7 BTDC when the vac shuts off making it 30 overall. How does that sound? Thanks for the link to Randy's page, it is awesome. I have to go outside and oil the distributor on the 63 right now.
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63 220S W111 76 300D W115 2013 VW JSW TDI M6 previously- 73 280 SEL 4.5 86 300E 5 speed 2010 VW Jetta TDI M6 Last edited by joshhol; 02-20-2003 at 11:04 PM.
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#10
02-20-2003, 11:06 PM
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AFAIK, the vac only shuts off when you're running the AC or something.
__________________
Current: 2021 Charger Scat Pack Widebody "Sinabee" 2018 Durango R/T Previous: 1972 280SE 4.5 2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi" 1999 Chrysler 300M - RIP @ 221k
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#11
02-21-2003, 12:01 AM
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AC on and or temp over 212F.
Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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