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Thread: Removing engine/tranny from 74 R90/6 frame

  1. #16
    Registered User dmftoy1's Avatar
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    Very nice.

    Ordered oil pump cover seal and rear main seal today. I'll do some fluid sniffing and then check input shaft seal. (is it a pretty common seal failure?)

  2. #17
    Registered User dmftoy1's Avatar
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    Figured the thread is worthless wo picsImageUploadedByTapatalk1347318308.993600.jpg

  3. #18
    Registered User dmftoy1's Avatar
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  4. #19
    Superkraut typ181r90's Avatar
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    Looks like an input shaft seal leak to me, don't know how common they leak but Snowbum makes it out to seem like you won't need to replace it until you're ready for a trans rebuilt. FWIW, when I did my rear main + oil pump, my trans input seal wasn't leaking at all, but I changed it as preventative maintenance while I had everything apart, and like I said earlier it seems like BMW updated the design of that seal sometime ago as well. Gear oil wreaks of sulfur and you would definitely be able to tell the difference from motor oil, enough of a whiff will make you feel sick
    // 1975 BMW R90/6 (cafe'd) // 1957 BMW R60/69S (new project) // 1967 Aermacchi/H-D Sprint 250 SS (resto-mod) // 1973 VW Type 181 Custom SOLD )

    http://symphonyofshrapnel.blogspot.com

  5. #20
    Registered User dmftoy1's Avatar
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    Damn! Forgot to sniff it. . On the checklist for tonight

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