I just got rid of green grunge (I don't know the history of and summer is on the way in NC). Got my non phosphate antifreeze AND a service manual.

BUT the book is very vague on bleeding the upper end...I measured all that came out and accounted for spillage - MORE than is going back in!

Any ideas other than parking on a hill, squeezing the hose and shaking the car??
(tried all 3)

Thanks in advance

Fill thru the expansion tank, then undo the top hose from the Rad and fill it up

I did get that much done but I'm still about a quart and a half short. I've got an air bubble somewhere and with the reputation of 603 heads I do NOT want to drive it 'till it's out like an older iron head.

Raise the front of the car a little so the air will migrate to the Rad. Undo the hose from the Expansion tank to the top of the rad at the tank end. Keep the hose above the level of the rad and use a small bore funnel to slowly top up the cooling system. Keep an eye on the level in the expansion tank to avoid spillage from the open end. Air should work its way out through the hose. Once the hose stays full reconnect it to the expansion tank.

Until you run the engine and open the thermostat you aren't going to get rid of all the air in the system.

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1991 M-B 560SEL Arctic White/Grey 99,000 Miles
1987 M-B 300SDL Ivory/Palomino 229,000 Miles (sold but never forgotten)
2006 Volvo XC70 Blue/Beige
1999 Porsche Boxster Arena Red/Savanna Beige
1986 Porsche 928S Goldweiss/Brown

how do u know you have air in system? usually the air will find its way out if you leave cap off while running / filling for the 1st few minutes.

i did my water pump, didnt have much trouble refilling and i didnt bleed coolant. theres alot of coolant down in block that doesnt come out, usually you can never fill as much as what comes out. takes a few hrs of running engine, just keep a close watch on level for 1st few days and keep filling as reqd. as long as there is atleast some coolant in the res it shouldnt overheat.

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Paul
Benz-less
I need an SDL !

I just let mine idle with the heat on full blast and she bleed herself. Burped a few large bubbles the next day when I was out driving but nothing major, just had to add a little coolant.


These engines take a very long time to warm up at idle, and remember the T stat has to open to really get the coolant flowing.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200