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Author Topic: fuel injector pump oil overflow early 250sl red cap  (Read 2922 times)

merutka

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fuel injector pump oil overflow early 250sl red cap
« on: August 20, 2013, 20:59:49 »
oil was leaking out my red cap. 1 liter per 200 miles.  turned out to be 6 seals under the plungers.  a pain to replace. access from top and side cover.
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garymand

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Re: fuel injector pump oil overflow early 250sl red cap
« Reply #1 on: August 21, 2013, 20:43:11 »
So gas was leaking past the seals.  Then the oil was drained and refreshed?
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Gary
Early 250SL German version owned since 71, C320, R350, 89 Porsche 944 Turbo S

merutka

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Re: fuel injector pump oil overflow early 250sl red cap
« Reply #2 on: August 22, 2013, 19:41:31 »
no gas was leaking. it is stopped by the oil film seal between the plunger and piston case.  The seals stop high pressure oil from pushing into the lower part of the pump.
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garymand

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Re: fuel injector pump oil overflow early 250sl red cap
« Reply #3 on: August 23, 2013, 20:39:48 »
Thanks, that helps.
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Gary
Early 250SL German version owned since 71, C320, R350, 89 Porsche 944 Turbo S
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