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Thread: 750il intake manifold gaskets

  1. #1
    Join Date
    Sep 2016
    Location
    Michigan
    Posts
    226
    My Cars
    1997 528i, 2000 750il

    750il intake manifold gaskets

    So I am saving my pennies to do the intake manifold gaskets on my car, hopefully before winter comes.

    Questions:

    Should I just stick with BMW OEM gaskets or would aftermarket work as well. Dont want to do this again.

    What else should I be replacing while I am in there?
    I need to get a list of things to order.
    I would imagine spark plugs...I dont know what kind they are or how old they are.

    If anyone had done the intake manifold gaskets before, how long did it take?

    Are there any pitfalls to this job, I don't want to do like I did before...breaking something that I thought was small and turned out to be very expensive.

    Thank you for reading this.

  2. #2
    Join Date
    Feb 2013
    Location
    The Motor City
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    My Cars
    1997 750 IL
    I just did my 1997 intakes when I did the head gaskets. Fairly easy to do. I never heard of aftermarket gaskets. All I ever found was the $550 set of OEM. I ended up using hylomar on my old gaskets since $550 for those is such a joke. Car runs fine but I have not smoke tested it yet.

    Anyway, new vac lines, TB gaskets, new plugs for sure since it's cake to do them and make sure you have about 14 inches of extension for your 1/4 ratchet.

    The whole job can be done in 6-8 hours for a first timer I would say and no pitfalls except make sure you do not drop hardware down the open intakes. I would spray some injector cleaner into your injectors when you get them out and replace the seals. I got tons of gunk out when I held them open with a 9v battery and sprayed them.
    Last edited by xboss; 09-18-2017 at 05:24 PM.
    ---- Processing Individual ----
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  3. #3
    Join Date
    Jul 2016
    Location
    Chicago, Illinois
    Posts
    3,842
    My Cars
    are slow
    Don't buy the gaskets.

    Reinzosil/Hylomar as said above and done.

  4. #4
    Join Date
    Dec 2013
    Location
    Newcastle, UK
    Posts
    44
    My Cars
    E46, E38, E39
    Quote Originally Posted by xboss View Post
    I just did my 1997 intakes when I did the head gaskets. Fairly easy to do. I never heard of aftermarket gaskets. All I ever found was the $550 set of OEM. I ended up using hylomar on my old gaskets since $550 for those is such a joke. Car runs fine but I have not smoke tested it yet.

    Anyway, new vac lines, TB gaskets, new plugs for sure since it's cake to do them and make sure you have about 14 inches of extension for your 1/4 ratchet.

    The whole job can be done in 6-8 hours for a first timer I would say and no pitfalls except make sure you do not drop hardware down the open intakes. I would spray some injector cleaner into your injectors when you get them out and replace the seals. I got tons of gunk out when I held them open with a 9v battery and sprayed them.
    Hi @Xboss, you wouldn't know where I can get the part number for the PCV, would you? tried Realoem website however exactly that picture does not have a number, "my friend" the specialist wants a small fortune for the job, claiming that he has to take the whole intake off, same porky that stealership will tell, at least them are not my "friends", car is 95' 740iL, symptoms are: smoke at startup and when stuck in traffic. I am going to try to change it with a buddy who has a garage but he hasn't done it before, there's a guy on youtube who changed it in 10 min.

  5. #5
    Join Date
    Feb 2013
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    The Motor City
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    5,719
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    1997 750 IL
    Quote Originally Posted by Robicoso View Post
    Hi @Xboss, you wouldn't know where I can get the part number for the PCV, would you? tried Realoem website however exactly that picture does not have a number, "my friend" the specialist wants a small fortune for the job, claiming that he has to take the whole intake off, same porky that stealership will tell, at least them are not my "friends", car is 95' 740iL, symptoms are: smoke at startup and when stuck in traffic. I am going to try to change it with a buddy who has a garage but he hasn't done it before, there's a guy on youtube who changed it in 10 min.
    Do you mean the rear manifold cover that does crank venting? Here is those, the boots sell seperate

    http://www.ebay.com/itm/BMW-E38-750i...72.m2749.l2649

    http://www.ebay.com/itm/For-BMW-E31-...9TEVMp&vxp=mtr
    ---- Processing Individual ----
    Z1XX Upholstery
    Seats front and back in Epingle / leather englishgruen,
    As Schl.Nr. B9EG.
    Front seat backrest in Montana Englishgruen (No. 8 174 861)
    Other interior equipment as for Volleder Nappa englischgruen,
    Schl.Nr. P5EG

  6. #6
    Join Date
    Dec 2013
    Location
    Newcastle, UK
    Posts
    44
    My Cars
    E46, E38, E39
    Quote Originally Posted by xboss View Post
    Do you mean the rear manifold cover that does crank venting? Here is those, the boots sell seperate

    http://www.ebay.com/itm/BMW-E38-750i...72.m2749.l2649

    http://www.ebay.com/itm/For-BMW-E31-...9TEVMp&vxp=mtr
    Thanks for the link, I went to "stealership" and got the right part for V8, £54.00 with the gasket, cheeky specialist who claims is my friend wanted £178.11 (don't ask where the £0.11 from) plus 2 days labour, like BMW would charge, should have asked them for a quote, I will cut my dishonest pal loose and attempt to do this myself, quite a few videos on youtube, fingers crossed.

  7. #7
    Join Date
    Jun 2012
    Location
    Long Island
    Posts
    583
    My Cars
    00 750iL 01 S8 96 Vette
    i highly recommend buying magnetic sockets for the intake manifold nuts. that, and a head-strap flashlight. came in handy when I did mine....
    WTB the following Highline/Individual parts for my 2001 750iL in Black (updated Apr 2016):
    -front sport seat-back cushion
    -rear U.S. entertainment armrest with radio/MID/seat/phone/shade/etc controls
    -rear digital climate control with rear blower and black leather housing/console
    -glovebox and rear right 2001 LHD 750iL wood trim with flag inlay; maybe the dash pieces too
    ~
    Ryan


  8. #8
    Join Date
    Jul 2015
    Location
    Dallas, Texas
    Posts
    582
    My Cars
    98 750iL, 01 740iL
    good idea. or put some of the door vapor barrier gum in the socket lol

  9. #9
    Join Date
    Feb 2013
    Location
    The Motor City
    Posts
    5,719
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    1997 750 IL
    Quote Originally Posted by MKIVJZA80 View Post
    good idea. or put some of the door vapor barrier gum in the socket lol
    Heh, what I did. Butyl is awesome
    ---- Processing Individual ----
    Z1XX Upholstery
    Seats front and back in Epingle / leather englishgruen,
    As Schl.Nr. B9EG.
    Front seat backrest in Montana Englishgruen (No. 8 174 861)
    Other interior equipment as for Volleder Nappa englischgruen,
    Schl.Nr. P5EG

  10. #10
    Join Date
    Jul 2008
    Location
    new york
    Posts
    395
    My Cars
    1999 750il, 1995 325i, 1995 trans am, 1985 corvett
    Hey guys,

    I am getting ready to replace both the intake and valve cover gaskets on my 99 750il. I was able to find genuine BMW intake gaskets from a cali dealership for $412.
    Would you suggest using the hylomar sealant only one or both sides of the intake gasket and valve cover gaskets?

    Thanks

  11. #11
    Join Date
    Feb 2013
    Location
    The Motor City
    Posts
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    My Cars
    1997 750 IL
    Well,

    I'm no expert but I'm the last guy on this forum to have the heads off (6 weeks ago) and I would say yes, use a tiny film of hylomar because the intake mounting surfaces on both sides will have pitting and dings and such.
    ---- Processing Individual ----
    Z1XX Upholstery
    Seats front and back in Epingle / leather englishgruen,
    As Schl.Nr. B9EG.
    Front seat backrest in Montana Englishgruen (No. 8 174 861)
    Other interior equipment as for Volleder Nappa englischgruen,
    Schl.Nr. P5EG

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