W124 coolant fan options - PeachParts Mercedes-Benz Forum

speednjay · #1 07-06-2020, 12:02 PM

Quote:

Originally Posted by Zulfiqar

does the main cooling fan roar at all?

in february, I helped a person here with a W124 E320 and got him a good fan clutch and installed it. That thing definitely roars now when driving in 99F weather and the AC cranked up, the engine temperature is pretty stable at the usual 100C mark.

It pulls air but I can’t say it roars. It’s a bran new behr. All 3 cars have the same Setup.

Zulfiqar · #2 08-06-2020, 05:51 PM

Quote:

Originally Posted by speednjay

It pulls air but I can’t say it roars. It’s a bran new behr. All 3 cars have the same Setup.

If its the same quality as the BEHR found on the 95 E300, then its a poor excuse of a fan clutch, I actually refilled the fan clutch of my old E300D with a thicker oil and got great results, uptil the time I changed it for a sachs branded one.

The fan was extremely loud when locked on, I think the original fluid in the clutch is too thin and causes too much slip and leaks too easy.

The guy whose W124 E320 I helped with had a sachs/horton clutch installed by me on his car and it was perfect - I had to use compressed air to clean the condenser fins and also washed it off of some non-corrosive condenser coil cleaner to remove road grease from it. This work definitely improved airflow a great deal lot.

Ivanerrol · #3 08-07-2020, 06:34 AM

Have you had the cooling system pressure tested?

These are old cars. Water pumps have probably deteriorated on all three cars.
I've had the same problem on W124's I've owned and then made the misfortune to install a cheap PRC water pump. Replacing a water pump on the M103 is a job you only want top do once.

After two less than effective pumps I bit the bullet and installed an OEM Graf. Never had an issue after. Even 40+ degree (110F) days, the auxiliary fan hardly came in.

And I'll put my habd up as well and recommend the Sachs fan. Beware there are a lot of cheap fan knockoffs with the Behr name on them.

Zulfiqar · #4 08-07-2020, 06:37 PM

Quote:

Originally Posted by Ivanerrol

Have you had the cooling system pressure tested?

These are old cars. Water pumps have probably deteriorated on all three cars.
I've had the same problem on W124's I've owned and then made the misfortune to install a cheap PRC water pump. Replacing a water pump on the M103 is a job you only want top do once.

After two less than effective pumps I bit the bullet and installed an OEM Graf. Never had an issue after. Even 40+ degree (110F) days, the auxiliary fan hardly came in.

And I'll put my habd up as well and recommend the Sachs fan. Beware there are a lot of cheap fan knockoffs with the Behr name on them.

even the original slim type behr clutch is useless, to make it work you need to fill it with 12000 cst oil, otherwise it doesnt engage.