S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

Radiator fan swap. my cooling is not where it should be

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Old 06-03-2018, 05:17 AM
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S500 w140
Radiator fan swap. my cooling is not where it should be

Can i replace the single radiator fan on my s420 with a dual radiator fan of a s500?
Old 06-26-2018, 08:23 AM
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why not? however radiator do get clogged,and will need replacing,cooling system flush,new or lower tstat.
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Old 06-28-2018, 02:59 AM
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S500 w140
Uh huh. Noted, will change my tstat and see how that goes. Thanks for the reply.
Old 06-28-2018, 07:36 AM
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If you have not done so flush system,I use a racer's trick.I remove tstat,and put neck back on,I drain system then use one gal. vinegar with water. I turn on heat and drive 30 minutes. Come back,and let engine cool over night,drain flush system with water. Then fill with coolant.I use Evan's PG coolant at 100% so I'm good for 10 years. I always drill a hole in stat so it will bleed easy.
Old 07-14-2018, 05:51 AM
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Got the temperature to where it should be. It doesn't go above 80.. Whoop whoop. Got a new radiator fitted and changed a new tstat.. She's cruising so well.. Though I noticed my tranny slipped. Kinda missed 3rd gear. Gear 2 held high rpm before it went to the 4th gear. Anyway back to the garage..

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