I flushed the antifreeze in my car a while back - radiator and block. Sometimes it runs a little hotter than it should. I'm thinking I may have an air bubble but I'm not sure how to get rid of it. I used Zerex G-05 and blended it with distilled water.

How can I make sure there isn't any air in there? '82 240D.

Thanks,

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)

Fill the engine thru the top radiator hose while the car is pointed uphill. Afterwards, run it with the heater wide open until all the air is purged.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

That seems to work for me too, then I just drive it keep an eye on the coolant level for a few days.

I might add that you can remove the "block to fire wall heater hose" at the fire wall and wire it up. When coolant comes out that hose while filling via the upper radiator hose, reattach it. Maybe that step isn't necessary with just a T-stat change but if the block has been drained, I think it helps.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

if you use one of those "flush and fill" tees in the upper heater hose, it makes life simple.
just take off the cap, fill block with distilled water, then pour in 1.5 gallons of G-05 and tighten the cap up.
perfect mix and no air every time.
also, on an 82, with the upper bleed hose on the radiator tank going to the expansion tank, with the car pointed uphill, there should be no air in the system when you fill through the expansion tank.
John

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

No expansion tank on a 240D tho, goes right overboard

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

A word to the wise, AVOID leaving the TEE in line if you ever decide to use that Prestone ENGINE KILLER!
Do a search. Its proven at least two people I know (one is my brotyher) totalled an engine when the cap blew off of the damn things!

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!

I made up a fitting for flushing the system. It a 1/2 pipe nipple (fits into the heater hose) with a gate valve and "garden hose" thread adaptor, works great.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

heh, yeah, I meant, all TURBO 82's... sorry.
if it's not got an expansion tank, it should have a vent drain plug in the thermostat housing.
John

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

I have always had success running the engine at high RPM for a minute or two.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Take off the cap, run the engine up to 3000 rpm's three times. Works everytime.

John

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President Minuteman Section MBCA
www.mbca.org/minuteman

The MB Engine Service Manual has a nice description of the cooling system, see 20-005.....please note that the system as described is self venting! Also, section 20-010 will explain the proper method of draining and filling the cooling system.

SB

Note: As I am most familiar with a 300D (but have owned a 240D), I checked that the manual is the same for both.....it is.....

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Diesels:
'85 300D, "Max, Blue Benz", 155K, 27.0 MPG
'84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG
'77 240D (parts car)
'67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP)
Gassers:
'94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG
'85 190E 2.3, 148K....Parts Car
'58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG