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#1
12-23-2008, 03:05 AM
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Strange new noise
Hiya team,
So I tried to up the '85 other day, without really considering the temperature (-20 C). Gertraud didn't look favourably upon this, and refused to start. So I glowed. And cranked. Ad nauseum. Several glow cycles and cranking attempts, and a hefty jump later, she finally did turn over under her own power, but with an odd new noise. It sonds kind of like a gasser with a hole in the exhaust manifold, like a "putt-putt" sort of noise, but it's coming from the IP sid of the engine, not the side with the manifolds. Any ideas? Could super cold cranking cause an exhaust manifold gasket rupture? Could it be something exotic, like some funny seal or other component like in the vacuum pump or SLS pump? Any ideas wold be appreciated. PS we now plug her in at night (guilty facial expression-she already had a heater), and glow mightily before cranking
__________________
George Vincent: 1984 300D - 255,000 miles - NEW! Wilbur: 1991 GMC Sonoma 2WD 2.5L 5-speed 250,000 km (top secret project) Pancho: 1992 Mitsubishi Pajero SWB RHD 2.5L intercooled turbodiesel - 215,000 km 
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#2
12-23-2008, 03:07 AM
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Is the noise constant? Doesn't go away after things warm up?
-Jason
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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#3
12-23-2008, 03:48 AM
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yeah its constant
__________________
George Vincent: 1984 300D - 255,000 miles - NEW! Wilbur: 1991 GMC Sonoma 2WD 2.5L 5-speed 250,000 km (top secret project) Pancho: 1992 Mitsubishi Pajero SWB RHD 2.5L intercooled turbodiesel - 215,000 km
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#4
12-23-2008, 10:24 AM
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There are no exhaust or intake parts on the side where the IP is located.
__________________
RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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#5
12-23-2008, 11:01 AM
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So it does not go away once the car is warm? I don't see how cold cranking could cause any gasket problems. You do have a correct antifreeze blend in the car, yes?
I would check things like the vacuum pump with a mechanics stethoscope to see if you can find the source.
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#6
12-23-2008, 02:08 PM
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Yes, bgkast, the antifreeze blend is definitely correct, I've got HOA coolant mixeed in the correct proportions for a minus 40 C mix. Also, I have decided that there is a corresponding loss of power associated with this new noise. The acceleration is now not as peppy as it used to be, even once the car has warmed up. I guess I am afraid that something in the injection pump is bunged up, and that might be beyond my level of expertise to fix. Of course, there is a "fresh" engine in stinky...
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George Vincent: 1984 300D - 255,000 miles - NEW! Wilbur: 1991 GMC Sonoma 2WD 2.5L 5-speed 250,000 km (top secret project) Pancho: 1992 Mitsubishi Pajero SWB RHD 2.5L intercooled turbodiesel - 215,000 km
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#7
12-23-2008, 02:16 PM
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The EGR could be stuck open or leaking.
__________________
RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K
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