W114 radiator cap needed. - Mercedes-Benz Forum

 
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post #1 of 4 (permalink) Old 10-14-2015, 10:03 AM Thread Starter
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W114 radiator cap needed.

It looks as though I need a new radiator cap for my 1972 250. I took the old one to autozone and o'rileys and both places did not have any information on their computers to sell me a new one. As you can see in the photo, there is no indication of how many pounds this cap should have. Any ideas from anyone as to what cap I should get?

UPDATE: I think the 120 on the cap is the bar rating of 1.20 which equals 17 psi?
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Last edited by Luna Gaudi's 72 250; 10-14-2015 at 10:29 AM.
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post #2 of 4 (permalink) Old 10-14-2015, 10:36 AM
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W114 radiator cap needed.

@dgosh28 had to get a radiator for his. I don't know if you are seeking a new or used one. If used, I think my 1975 part out radiator probably has a cap on it. I have a few r107 radiator (overflow) caps, but thought they were much lower psi than that.

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post #3 of 4 (permalink) Old 10-14-2015, 11:33 AM
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Original was probably 100 kPa which is now next to impossible to find. M-B now offers only 120 kPa as replacement items. Pressure increases from 14.6 psi to 17.4 psi so you should be OK with a radiator in working order. Wouldn't recommend going to a 140 cap unless the rest of the cooling system is new. BTY, the "120" is the pressure expressed in kilopascals.
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post #4 of 4 (permalink) Old 10-14-2015, 08:13 PM Thread Starter
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Originally Posted by ejboyd5 View Post
BTY, the "120" is the pressure expressed in kilopascals.
Thanks guys! I definitely learn something new everyday.
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