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Braingears Expert Date registered: Apr 2006 Location: St Petersburg, FL Vehicle(s): G320 & ML320 Posts: 1450 | G320 Exhaust Manifold My front exhaust manifold (Cyl 1-3) has practically shattered, and is missing a big chunk from the outer shell. Needless to say, I've got to replace it. The original part number is A1201422001, and is very expensive. It happens to be shared with the M120 V-12 engine used in the 600SEL, 600SEC, SL600 and shared platforms. While researching the V12 engines, I found the A1201422001 replaced A1201420801 and A1201421801. Can I assume that I can replace mine with one of these older manifold versions used in the V12s? The big assumptions are that all three are interchangeable on the V12, and that I could also interchange any one of these with my G320. | ||
#242676 | |||
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DesertStar Expert Date registered: Apr 2006 Location: San Diego, CA USA Vehicle(s): 85-280GE/95-G320/08-G500 Posts: 2156 | RE: G320 Exhaust Manifold Braingears - 4/27/2021 10:10 PM My front exhaust manifold (Cyl 1-3) has practically shattered, and is missing a big chunk from the outer shell. Needless to say, I've got to replace it. The original part number is A1201422001, and is very expensive. It happens to be shared with the M120 V-12 engine used in the 600SEL, 600SEC, SL600 and shared platforms. While researching the V12 engines, I found the A1201422001 replaced A1201420801 and A1201421801. Can I assume that I can replace mine with one of these older manifold versions used in the V12s? The big assumptions are that all three are interchangeable on the V12, and that I could also interchange any one of these with my G320. Did you ever find out if the other manifolds with different part numbers are compatible with the A1201422001 ? Thanks | ||
#242710 - in reply to #242676 | |||
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Braingears Expert Date registered: Apr 2006 Location: St Petersburg, FL Vehicle(s): G320 & ML320 Posts: 1450 | RE: G320 Exhaust Manifold I've purchased a brand new one on eBay, although I haven't installed it yet.
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#242718 - in reply to #242676 | |||
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DesertStar Expert Date registered: Apr 2006 Location: San Diego, CA USA Vehicle(s): 85-280GE/95-G320/08-G500 Posts: 2156 | RE: G320 Exhaust Manifold Braingears - 5/28/2021 9:08 AM I've purchased a brand new one on eBay, although I haven't installed it yet.
I will try out alternate part numbers that sure look the same....and update my findings. If for some reason you do not utilize your new manifold and are interested in selling, I would be very interested. Mike | ||
#242726 - in reply to #242718 | |||
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Braingears Expert Date registered: Apr 2006 Location: St Petersburg, FL Vehicle(s): G320 & ML320 Posts: 1450 | RE: G320 Exhaust Manifold The part did NOT fit. Apparently there is a Right hand drive and Left had drive that got mixed up. I still need either
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#242966 - in reply to #242676 | |||
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DesertStar Expert Date registered: Apr 2006 Location: San Diego, CA USA Vehicle(s): 85-280GE/95-G320/08-G500 Posts: 2156 | RE: G320 Exhaust Manifold My original manifold started rattling from inside. As you know the manifold is kind of a two piece unit welded together, an outer shell over an inner. I purchased another used one from Guido that had a small crack on outer "shell". I had it welded up and seems to be good so far. If yours is not rattling from inside and has small crack on outer, I would consider welding up by a competent welder that knows his stuff...or seek an exhaust guy that is not new to manifold work. | ||
#242967 - in reply to #242966 | |||
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Braingears Expert Date registered: Apr 2006 Location: St Petersburg, FL Vehicle(s): G320 & ML320 Posts: 1450 | RE: G320 Exhaust Manifold I think I'm beyond that point.
(Exhaust1.jpg) (Exhaust2.jpg) Attachments ---------------- Exhaust1.jpg (124KB - 0 downloads) Exhaust2.jpg (104KB - 0 downloads) | ||
#242972 - in reply to #242676 | |||
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DesertStar Expert Date registered: Apr 2006 Location: San Diego, CA USA Vehicle(s): 85-280GE/95-G320/08-G500 Posts: 2156 | Re: G320 Exhaust Manifold Now that is a crack. Thanks for posting as I now know what the inside is comprised of. Mine rattles on that inside part at a certain rpm and load….dont hear after 40 mph. Annoying as hell when driving slow speeds through neighborhood or scenic highways. | ||
#242975 - in reply to #242972 | |||
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