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#1
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sudden cacophony; how screwed am i?
1700 miles ago i had an indie shop put a no-EGR turbo 617 into my 240D. after i replaced the turbocharger, injectors, filters, ALDA tampering, diesel purge, valve adjustment, thermostat, fluids, etc., i finally got it running pretty nicely. still too much smoke when cold, which i guess may be down to IP timing, but nonetheless.
i had wanted to run B99.9 all along, in order to do a somewhat more sustainable thing with higher cetane and lubricity, and when i had achieved the above and changed out all the relevant fuel lines for viton, i went ahead and filled up on it. the result was amazing: my idle smoothed way out, good power, the engine seemed really happy. i watched the (now golden) prefilter for evidence of extra sediment being loosened by the solvent fuel, but it hadn't gotten particularly dirty. last night on my way home from work the engine seemed louder than normal, more bangy or clacky. i wasn't sure if i was perceiving it correctly and thought it was likely that my air filter had fallen off again. i eased off and limped home as the noise, matching engine RPM, got louder and nastier. by the time i arrived it sounded like gnashing or scraping, as if something big was going without lubrication. to me, anyway, it was a very alarming sound. it seems clear that i've damaged the engine. oil is still there and the coolant temperature was correct throughout (no oil pressure gauge yet, since i ended up with the 126 OF housing with electrical sensor). i haven't cranked the starter since. could an oil channel have gotten clogged up? what do you all think happened?
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'77 240D, 504H, OM617.952, etc. |
#2
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could be nearly anything... alternator, fan clutch, rod bearings, Mains, cam issues, timing chain, torque converter, transmission front pump or bearings, it's a big list of possibilities...
how are the motor mounts?
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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 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#3
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I would have pulled over and checked the oil level right away, but you say that checked out?
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#4
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Probably add vacuum pump to that list of things to check.
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Current Stable
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#5
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did you lose any oil? Is there any oil in your coolant ? did you pull the valve cover to take a peek ? Will the car start ? Anything tangled up in the belts ? Can you isolate where the sound is coming from vs. the "engine bay"?
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#6
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Not enough information to do any debugging, buddy.
I'd pop the hood and check the usual things... oil level, oil quality, pull the oil filter, check for bits. Look for things that are loose. Pop the valve cover, check what you see. You can do all these things without starting the engine. Good luck! Packman
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83 240D - 4 speed manual - Manilla Beige 189K miles, Tachometer mod, cool wooden shift knob from PeachParts, CocoMats, Original factory paint, manual windows, manual sunroof. Starting to add AudioWrap to this car too! |
#7
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No reason it has to be anything really serious.
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#8
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Very bad idea to drive without an oil pressure gauge. Warned a friend of mine about that once. He ignored the warning and destroyed his engine. Get one in there ASAP.
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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 |
#9
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OK folks, thanks for responding, these are good things to check. i will pull the valve cover and inspect the chain, check the coolant for oil, and check the oil for detritus.
no oil was lost. i checked it as soon as i stopped. the motor mounts were new at the time of the swap. it's manual so i can rule out TC/trans pump issues. what should i look at vis-a-vis the alternator and vacuum pump?
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'77 240D, 504H, OM617.952, etc. |
#10
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Quote:
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#11
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Was the rear end or trans upgraded to match the turbo engine?
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#12
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Video of sound would help diagnose.
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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 |
#13
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cooljjay, trans no (it's manual), diff yes (2.88), but since the noise didn't abate with the clutch disengaged, i don't think the problem was back there.
kerry, i think i'm going to rebuild the cluster to include an electrical movement rather than swap to the other OF housing. however, i agree. if and when i start it again i will record the sound. last night it wasn't going to happen. ichris, will spin them by hand. thanks everyone for all your support!!!
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'77 240D, 504H, OM617.952, etc. |
#14
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I'd just grab a cluster from the junkyard with an electric oil pressure gauge and stick it on the dash or console and hook it up to get the info in the meantime. Or maybe just get a cheap aftermarket electric gauge and hook it up to the sender.
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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 |
#15
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A lose air cleaner is louder than some mechanically worse noises, but I'd narrow the source down before driving far. A piece of hose or screwdriver can be a useful mechanic's stethoscope. Well, worse comes to worse, you didn't scrap the 616 did you?
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CC: NSA All things are burning, know this and be released. 82 Benz 240 D, Kuan Yin 12 Ford Escape 4wd You're four times It's hard to more likely to concentrate on have an accident two things when you're on at the same time. a cell phone. www.kiva.org It's not like there's anything wrong with feeling good, is there? |
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