|
|
|
#1
|
|||
|
|||
Why is my 98 300d 606 engine sluggish cold?
I have 140k miles on this car. Its been sluggish when cold here especially now that cold weather is here. The car has had a slight surge for a while now too. It had a fuel filter at 108,000 miles in November of 2003 ? Any suggestions ?
|
#2
|
||||
|
||||
Quote:
__________________
Never a dull moment at Berry Hill Farm. |
#3
|
||||
|
||||
In Austin? Geez, how cold is it getting over there?
__________________
Rick Miley 2014 Tesla Model S 2018 Tesla Model 3 2017 Nissan LEAF Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro Chain Elongation References |
#4
|
|||
|
|||
Quote:
|
#5
|
|||
|
|||
Austin diesel
Quote:
|
#6
|
|||
|
|||
All diesels are low on power (in Texan: giddyup) when started cold on a cold morning. I've read the block and head are absorbing the heat, reducing what's available to expand the combustion gases and produce power. Sounds reasonable. Whatever, all the diesels I've ever owned exhibited the behavior. If you think your modern om606 turbo is bad, try one of the older cars!
- JimY |
#7
|
|||
|
|||
I agree. All diesels are slugs when cold.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13 |
#8
|
|||
|
|||
related question
I have a related question: is there any valid, technical merit in allowing a cold diesel to warm up before driving it, even for just a minute?
Is it ok to "floor it" even when its cold? Normally I baby the car at least until the air starts blowing warm from the heater. thx |
#9
|
|||
|
|||
There's no reason to let an engine warm before driving off. So long as the oil pressure has come up and the various internal bits are being lubricated, it's time to move off. Typically starting the engine, then fastening your seatbelt, checking mirrors, selecting a radio station matching your current mood, etc. allow sufficient time.
It don't think letting a diesel idle for a few minutes is harmful to the car, unlike a gasoline engine. On a gasoline engine, the cold engine causes the fuel to condense on the walls of the intake manifold and/or cylinders. There it washes off the oil film, and eventually runs down into the crankcase, diluting the oil. This process has bad effects on engine life. The strategy to maximize engine life is to minimize the time the engine spends cold. Driving off as soon as possible warms the engine much faster than letting it idle. From another point of view it's undesirable to let any car - gas or diesel - warm at idle because it consumes fossil fuel and generates air pollution without providing any transportation. Idling cars all get zero MPG. I could ramble on longer, but this seems sufficient. - JimY |
#10
|
||||
|
||||
I idle my car in the garage when I found out the block heater was not working.
This way I have it ready to go in the morning. Only problem is that the neighbors thought someone was commiting suicide....... |
#11
|
||||
|
||||
We started our 83SD cold and tried to drive it up on some ramps...it got half way, growled there for a bit, then rolled back down, pedal to the floor It just couldn't do it....I bet it was putting out like 25-30hp at that point. Mine is the same way, extreeeemely slow take off when its frozen, but within a couple mins of driving its doing fine, and its only on the real cold mornings when its 30 or less out that its real noticeable.
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#12
|
||||
|
||||
I have not really noticed my 603 acting any differently when it is cold. But I never let it over 2k rpm until it is warm. Not only the coolant but more importantly the oil, I won't get on it until it is idleing at 1.5bar. Turbo's spin real fast and don't like cold oil, getting on a cold turbo engine is a real bad idea.
__________________
1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
#13
|
||||
|
||||
Yeah, here in Northern California it's been getting around that same temperature... just let her warm up I dont see much wrong with flooring my car when when cold, since it doesn't even respond very much! I noticed a lot of white smoke too this morning while letting the car idle for around 6 minutes or so.
__________________
1985 CA 300D Turbo , 213K mi |
#14
|
|||
|
|||
As a M/B tech I'd agree that sluggishness while cold isn't out of the ordinary but sluggishness with a low speed surge would concern me. I've known a few OM60x.xxx diesels that exhibited this behavior right before a timing chain breakage. You could have a stretched chain that's getting ready to let go The newer diesels are not typically as sluggish cold as the older ones. You have relatively low mileage so your engine should be good and strong. I'd have the timing chain (and tensioner, and cam gear bolt, and rails ) checked ASAP and replaced if warranted. It might sound like I'm trying to scare and to some extent I am. I have a OM603.971 diesel on the engine stand right now that broke it's chain at 80k unabused original miles. It's gonna have a 7K$ repair bill to fix. Compare the price of a chain and tensioner to an engine and then get your car to a shop to have it checked. ASAP
|
#15
|
||||
|
||||
Quote:
__________________
2002 G500 74K 1998 E300 200K and rising 1995 S600 73k "Some people spend an entire lifetime wondering if they've made a difference. The Marines don't have that problem."-Ronald Reagan "Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity."-General George S. Patton |
Bookmarks |
|
|