Author Topic: Correct injection pump air filter for 1965 230SL  (Read 451 times)

franjo_66

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Correct injection pump air filter for 1965 230SL
« on: October 11, 2021, 06:19:25 »
Hi all

Had an issue with cold start (ie engine struggling to idle and rpms not @ 1000rpm)
Traced it down to a faulty air filter on the injection pump. As soon as I pulled it off, it was sucking air and cold start no longer an issue.

What I did notice was that the filter on my pump has the larger 18mm thread and 22mm hex head. This I believe is the same version as fitted to pumps on the 250SL & 280SL.

My pump version is the PESK6KL70/120R11 unit.

Does this mean that my pump has been retrofitted with the later version WRD? Or did some of the 230SLs use the later version of the air filter?  I was thinking of replacing the thermostat in case I have the later version. Is it simply a matter of measuring the thermostat housing to verify which version I have. I think mine was around 74mm from base to top

Regards
Franjo
Franjo

1965 230SL Black/Auto/RHD
2005 Porsche Cayenne Turbo
1983 BMW 735i
1986 560 SEC
1991 500SL
1982 Holden Statesman DeVille

Pawel66

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Re: Correct injection pump air filter for 1965 230SL
« Reply #1 on: October 11, 2021, 13:00:48 »
The filters are the same from what I remember. Available at the dealers. Cannot check PN now, but they will find it easily.
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

Esmo

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  • SL 230 1967
Re: Correct injection pump air filter for 1965 230SL
« Reply #2 on: October 11, 2021, 21:28:34 »
Hi I think it’s  Mann  FMH 4500162185    M18 thread

franjo_66

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Re: Correct injection pump air filter for 1965 230SL
« Reply #3 on: October 11, 2021, 23:55:29 »
Thanks Pawel & Esmo

The current filter on my pump is a Bosch one with pn 0 457 103 002. So I will order the later version

Without taking the WRD apart, is there any other way to confirm whether my pump utilises the ealier or later version of the injection thermostat?
Franjo

1965 230SL Black/Auto/RHD
2005 Porsche Cayenne Turbo
1983 BMW 735i
1986 560 SEC
1991 500SL
1982 Holden Statesman DeVille