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QUICK - Please Help - Front CAMSHAFT OIL SEAL V70-XC70 1995

posted by  bhs82 on  Sun Apr 24 20:11 CST 2005
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last visit: Tue Dec 7 10:15 CST 2010
[RELATED]

Thank you for looking.

I have my 95 850 Turbo Wagon apart right now tackling several things at once (120k major service, struts, T Belt, tensioners, pulleys, water pump, etc.)and need help getting a question answered about the front camshaft oil seal. I saw in another thread here, where a guy mentioned how a leaking seal could affect the timing belt and it's components. Sure enough, my exhaust cam seal seems to be leaking. I just spent the money on new pulleys, belts, tensioners, the worx, and would hate to have that all compromised by leaking oil.

To replace the the front camshaft oil seal, I would think that I could mark the sprocket... carefully remove it, pull the old seal, put a new one in place, and re-mount the sprocket. The key being to mark the sprocket in a way that it goes back to the EXACT position it was in before removal. I currently have IPD's Camshaft locking tool in place for the T-Belt replacement. Look at the pic below. I am thinking this device would give me an exact correlation for markings from sprockets to tool to head ... all markings tied together and connected exactly via this tool.

The Haynes manual, however, states a lengthy process that involves the undoing of the top motor mount, removal of the air box assembley, distributor etc. to get to and expose the rear of the camshaft so that a camshaft alignment tool can be used for alignment. The process it calls for involves installing the T belt and tensioner, and "tapping" the belt before installing the final bolts on the sprockets and tightening them. The Haynes process is much more lengthy, involves more risk, calls for more parts (new bolts, nuts, rear seals, etc.) calls for other special tools and so on.

The only flaw I can think of with my plan would be if the sprocket to camshaft mounting could present play potential even within the 3 mounting bolts and markings.

Is there any reason that my plan would not work ???
One which would explain why Haynes has such an elaborate process laid out... or are the Haynes people just covering their butts and causing me inflated concern?
--
1995 850T Wagon 120k









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    QUICK - Please Help - Front CAMSHAFT OIL SEAL V70-XC70 1995

    posted by  bhs82 on  Sun Apr 24 20:17 CST 2005
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    last visit: Tue Dec 7 10:15 CST 2010
    [RELATED]

    One other question;

    I am obviously nervous about compromising my timing.
    Naturally I would want to replace the intake camshaft front seal while I am here, but that would involve removing the intake sprocket as well. In theory, if the markings are correct, this should not be a problem. But caution is tapping my shoulder saying that the less I disturb, the less the chance of screwing things up.

    Something tells me that if I keep the one sprocket in place, I could line up the other with less chance of compromise.

    Of course, I could do one side at a time as well, which virtually positions me as if I had never removed a sprocket...

    To those who know more about timing than I ;
    Am I worrying too much, or is my concern well warranted??
    --
    1995 850T Wagon 120k








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    QUICK - Please Help - Front CAMSHAFT OIL SEAL V70-XC70 1995

    posted by  bhs82 on  Sun Apr 24 20:13 CST 2005
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    last visit: Tue Dec 7 10:15 CST 2010
    [RELATED]

    Here is a pic of how I would mark the sprocket to camshaft
    --
    1995 850T Wagon 120k









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      QUICK - Please Help - Front CAMSHAFT OIL SEAL V70-XC70 1995

      posted by  nlemerise on  Wed May 4 04:19 CST 2005
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      last visit: Wed May 13 03:16 CST 2009
      [RELATED]

      Having never done the camshaft seals on this car, I may be blowing smoke but just thinking out loud...

      It would seem that the camshaft must be removed from the vehicle to replace the seal...is that correct? If so, then the real dilemma becomes making sure the camshaft is reinstalled exactly as it was installed prior to removal. Thus, there would be two alignments that must be done...the sprocket to the camshaft (as I think you are planning to do exactly correct, imho) BUT also, the camshaft to the engine head (for lack of a better description). If my assumption is correct (about camshaft removal required for camshaft seal installation) then this alignment would be critical. In other words, couldn't the sprocket be reinstalled perfectly, yet the camshaft be out of time aregardless, if it is not put exactly back in the same position it was prior to disassembly?

      Are you working on the B5254T engine, btw? I can provide you with head blow-ups and part lists if you tell me the engine model it is and if they would assist you in some way.







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