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#1
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91 300SE M103 flywheel sensor
Where exactly is the flywheel sensor in an M103 (91 300SE)? I'm about ready to lift the head with manifolds attached. The flywheel sensor wire is clamped to the manifold in several places. I might as well lift the wire with the assembly. One end is at the ESL box, easy enough to see. Where's the other end?
Thanks, Sixto 91 300SE 87 300SDL 83 300SD |
#2
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Next to the oil filter housing ON the engine casting just above the starter.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Thanks.
Sixto 91 300SE 87 300SDL 83 300SD |
#4
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Re: 91 300SE M103 flywheel sensor
Quote:
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107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership). 107.026: 500SLC, 4-speed auto, thistle green, green velour. 124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex. 201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather. 201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex. 201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather. |
#5
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The problem I see is that with EGR, I can't part the intake and exhaust manifolds enough to let the head come through unless I first dismantle the wraparound EGR piping. Also, I can't imagine how to get to the lower intake manifold bolts without taking a bunch of fuel injection doodads like the cold start valve. In short, I don't think I'll save any time by leaving the manifolds in the car.
But thanks for the suggestion. The head's not out yet since I get to work on it about 15 minutes a day so there might be an opportunity to do it your way Sixto 91 300SE 87 300SDL 83 300SD |
#6
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Ah! You have identified a difference between engines for different markets. In Australia our M103s did not have EGR, avoiding the problem you mention. Having not seen an EGR equipped version I cannot comment on this problem (I have noticed one of the exhaust manifolds has a flat, but no holes cast on the top for the fitment of an EGR valve).
As for reaching the lower inlet manifold bolts, they were not as difficult as they looked. I did it without any special tools. For me, leaving the inlet manifold in place had the advantage of not disturbing any fuel lines, wiring associated with the fuel injection, cruise control or throttle cables, in addition to the greater ease of man-handling the cylinder head mentioned in my earlier post. The manifold stays in place by way of a support attached to the engine block (which you will need to detach to remove the inlet manifold). Maybe others who have done the head on an M103 (with EGR) could comment.
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107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership). 107.026: 500SLC, 4-speed auto, thistle green, green velour. 124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex. 201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather. 201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex. 201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather. |
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