Damaged the Fuel Pressure regulator O-Ring - Page 2 - Mercedes-Benz Forum
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post #11 of 12 (permalink) Old 08-13-2019, 02:55 PM Thread Starter
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Date registered: Mar 2010
Vehicle: 1977 R107 450SL / 1988 W126 420SE
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Originally Posted by okyoureabeast View Post
I don't recall what it is, but I think more shims equals less fuel. Low pressure equals rich, high pressure equals lean.
Hahahah yeah I was just kidding guess the formula to high HP may actually be running it without the o-ring I screwed up .

At least the formula to flooding the engine hahaha.
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post #12 of 12 (permalink) Old 08-13-2019, 07:18 PM
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Originally Posted by Kpeters View Post
...
Question that comes to mind, how come only changing 1 o-ring will mess up the tolerances so much as to vary the system pressure if I'm not messing with the shims?
O ring has thickness and it changes over time as the rubber settles and assumes shape. If the new o ring is 0.1mm thicker or wider, it is close to two shim adjustment. It is actually a biet less and pressure could still be within tolerance... but should be checked anyway and adjusted if needed
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