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m116 Overheating Questions
Hey everyone,
I've got my 420SEL here and the other day it was having some temperature issues. At Idle w/ AC On, sitting for a while in a driveway it crept up to around 110C. The aux fan works. Around town w/ac (about 35-40mph) it was around 90-100C On freeway it was around 85C with ac on. Not really sure about w/o AC. Haven't checked it yet. My mechanic said that the fan wasn't moving as much air as it normally should. So maybe clutch? Others have suggested the radiator. Right now, I'm gonna replace the cap on the bottle (which is a COMPLETE pain to remove as it is right now) and the thermostat. I'm not sure how old the radiator is, its made by "IMI Radiators." I've never heard of them, but it has a MB emblem on it and some codes. It LOOKS ok and the fins look clear of debris... Anyone have any thoughts on the whole thing or the radiator. I was hoping someone knew more about the radiator... If the cap/tstat don't make a difference..what should my next step be? Replace rad? Replace clutch? $288 (Behr rad) vs $150 (Behr) clutch? [img]
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#2
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If the issue was overheating on the road, then the radiator would be to BLAME!
Since the problem is at idle, air flow is the problem. Fan clutch is the most likely cause. OR debris between condensor & radiator.
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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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ditto.
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
#4
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I believe you guys might be right.
I drove it today, 80 on the freeway, 80 around town for the most part. Got to 100+ in the drivethru with a/c on. Got cooler the more we drove at speed. I've heard bad things about some clutches any recommended brands? Most of what I've seen are Behr, $150, Uro for $150, Meyle for $288 Auto Haus lists a Fichtel-Sachs (OES) but it has a 2100005043 part number which I can't seem to find in the EPC and they want $270 for it.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#5
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Fan clutch replaced...problem still exists. replacing t-stat and flushing system seeing if that does anything.
RANT: WHAT GERMAN MASOCHIST DESIGNED THIS THERMOSTAT HOUSING?! WHY IS THE THIRD BOLT BURIED BEHIND!? WHO PUT THIS ALTERNATOR BRACKET HERE?! WHY IS IT SO LARGE!? UGH, THIS IS MILES MORE PAINFUL THAN m103/om617! I WANT TO REMOVE THIS ALTERNATOR BRACKET ROAR /end rant. Ahem.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
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This was after sitting in the driveway for around 20 minutes with a/c on after some spirited driving...
What came out of the radiator: Performed a flush, changed t-stat (PITA)....
__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#7
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that temp looks normal, so it is fixed now?
why is the coolant so red?
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1993 300E, 2.8 M104 ..... |
#8
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temp is not normal. normal is around 80C. That temp was sitting in my driveway and it was climbing upwards, and it was only around 80 outside, the outside temp sensor on the car was under the influence...
Not sure why coolant looks red. it came out golden colored. Probably just camera/bucket. Going to order new radiator as per recommendation of Hit Man X.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#9
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Well make sure there is no crap stuck between the aux fans and the condenser too, you will be surprised what builds up after 10 years... let alone 20.
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I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG] |
#10
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New rad is partially installed. Some dumb **** killed the threads when they installed the tranny cooler lines to the old radiator...so they wont go on the new one...and i cracked the fan shroud in half.
Replacements will be here tomorrow, then refill, and will be done..hopefully Also gotta figure out why it was dead this morning...It hasn't been driven in a few days but thats no excuse. My guess is battery issues as its old and the incorrect size...
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#11
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100 is normal especially with the A/C on. Even talks about that in the owners manual. 120 is overheating. If 110 was an issue red would be at that mark. Remeber these cars are made for speed, idle doesnt do as well as movement. Age is a factor but 100 is normal with A/C on. Compressor steals power causes load and uses power and creates its own heat and moves heat that transfers to the block.
If you do a search here and benzworld.org youll see alot more of it. Since its warmer out the temps just get higher on the gages. Its gonna happen. If you want it to read lower try cool harness which tricks the Aux fans to come on sooner to keep it cooler. |
#12
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k |
#13
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Nice going. Another happy ending. I love it when guys try to tell you what's normal, when you've lived with a car for 10 or 20 years and know very well it's not normal.
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1988 California version 260E (W124) Anthracite Grey/Palomino Owned since new and still going strong and smooth MBCA member Past Mercedes-Benz: 1986 190E Baby Benz 1967 230 Inherited from mom when she downsized 1959 220S Introduced me to the joys of keepin' 'em goin' There are only 10 kinds of people in the world--those who understand binary and those who don't |
#14
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Quote:
Exactly, my 560 has never been that hot at idle in traffic here in Texas... A new radiator makes a world of difference on these cars.
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG] |
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