Did my first bi-annual drain and fill. Now it runs hotter than before I guess I have an air bubble somewhere. I have driven it this way for a couple weeks and it hasn't changed and the level has not gone down. What can I do? Being a 124, even with the #17 head, I don't like it to run hot.

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K

Did you remove the upper radiator hose and fill the head completely?

Air likes to live up there........it's the highest point in the system.

I removed the temp sending unit at the highest position on the thermostat housing. and slowly poured coolant mix into the hole. Facing uphill (or on ramps) and it held slightly over a half liter.

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1987 300D (230,000 mi on a #14 head-watching the temp gauge and keeping the ghost in the machine)
Raleigh NC - Home of deep fried sushi!

Thanks!

I'll give that a try.

__________________

Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K