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#1
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Thermostat Replacement - Tempature Rating Significance? (78 450SL)
I'm looking online for a replacement thermostat, and I see that there are a variety varying from 167 degrees to 195 degrees. Can anyone tell me what significance of the temperature rating is? Does it mean the thermostat can handle up to 167 degrees? Thanks
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#2
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It means the thermostat opens at 167 or whatever temp it's rated for. Check with the dealer for the proper temperature.
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Regards Warren Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL ENTER > = (HP RPN) Not part of the in-crowd since 1952. |
#3
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That chassis/yr takes a 75 C [167 F] thermo...
http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=2AO123CS42CB0QGFCN&year=1978&make=MB&model=450-SL-002&category=G&part=Thermostat+Kit
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A Dalton Last edited by Arthur Dalton; 04-08-2008 at 12:31 PM. |
#4
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Thanks guys. I don't know if this is a dumb question, but why would someone want to place a thermostat that opens at a higher temperature then the standard 167 degree specification? It seems to me that you'd want to cool the engine as soon as possible?
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#5
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Engines tend to run more efficiently when warmer-up to a point. Too hot and bad things happen. Too cold and other bad things can happen.
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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress. |
#6
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these gals are designed to run hot, but stick to the right thermostat, no reason to mess with design specs...my 2C
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Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD 16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace |
#7
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A point missed on thermostats, there are two types ones that fail open and ones that failed closed. Whichever temp you get , you want to get one that fails open so you don't overheat. I would think, that's all that mercedes uses but I am not sure just in general for every car I have I use the fail open type.
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