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#16
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100 = 1 bar = 14.7 psi
120 = 1.20 bar 140 = 1.4 bar Your 100 cap is fine, it simply means that you can't overheat the engine as much as you could with a higher pressure cap. If you have a leak in your system (cracked tank top or whatever), the lower pressure cap is better. Mercedes tended to increase cap pressure in later models: my 123 has a 120 cap while my 124 and 210 both have 140 caps.
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#17
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OK, I ordered my new radiator too! I'll race you getting it in...
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250 |
#18
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Quote:
Quote:
I still cannot find that fat little short hose beneath the thermostat housing. It looks pretty bad too. I guess I will wait until I have the rad out, then take it in and size it up for replacement.
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AJ 1985 300D (SOLD) |
#19
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Yes thats fine 100 is better than 120. It means that the cooling system has to build up 100 before it opens to allow coolant to overflow.
100 caps are hard to find, most people just use the 120.
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg Last edited by 79Mercy; 06-16-2009 at 07:16 PM. |
#20
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I don't think that's right at all... 100 PSI would blow a cooling system apart. Cap pressures are in BAR as Jeremy stated and should open at the rated pressures he stated above.
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250 |
#21
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Your correct. I meant to say bar instead of PSI. Sorry... I'll edit my post. Brain fart...
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg |
#22
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Thanks again for the input guys. I got the idea. Basically I should stick with cap I got and just get it tested.
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AJ 1985 300D (SOLD) |
#23
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One more question. I was reading somewhere about using Zerex in the Gold bottle? I just went to 2 different auto parts stores. Neither had it and the nearest NAPA is over 30 miles away. Is there another brand or type that I can use?
Are there going to be any surprises removing and replacing this particular radiator?
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AJ 1985 300D (SOLD) |
#24
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NAPA is the only place I have seen that actually has it. You could buy it at the dealer for $25 a gallon if you want.....
Rad replacement is a fairly straight forward procedure. Just remember to have a little tranny fluid on hand. Don't go muscle man on those tranny cooler lines either, just snug them down a little, if they leak then tighten them some more.
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1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg |
#25
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Thinking that our injectors pop at 135 bar, I googled and it says 1 bar = 14.5037738 pounds per square inch, so 100 bar would be ~1450psi. Edit: well, if I had bothered to actually read the whole thread I would have understood. And btw, I'm right there with you guys. The JB weld the PO put on mine has started to weep.
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1984 300D Light Blue/Blue 2006 C280 Silver/Black Last edited by DSlater; 06-17-2009 at 07:53 PM. |
#26
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You'll have to "burp" the system when you refill it but it's not hard. Yes, you need either the MB coolant or the Zerex in the gold bottle. Not to worry if you cannot find it right now, it won't hurt anything to run plain old distilled water until you can get by the nearest NAPA. |
#27
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Found this nice replacement pictorial linked off the MBCA forums:
http://benzguy.piczo.com/engineradiatorreplacement123,126?cr=7&linkvar=000044
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1984 300D Light Blue/Blue 2006 C280 Silver/Black |
#28
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I'm headed up to Palm Bay tomorrow. I'll get the Antifreeze from Napa up there. Does anyone else carry the stuff?
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AJ 1985 300D (SOLD) |
#29
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the cap might be original and need of a change.
Mercedes has the coolant lol.. But its expensive. Glad Hatty gave me two gallons of the stuff. |
#30
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I'm thinking that since the old cap was shot, when Pierre put the new one on it has been pressurizing normally for the past few days. Then the old radiator just "gave up the ghost". It does look like the original radiator.
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AJ 1985 300D (SOLD) |
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