Page 3 of 3 FirstFirst 123
Results 41 to 47 of 47

Thread: Replacing a Previa head gasket.

  1. #41
    Forum Newbie
    My Van(s):
    1993 2WD Previa LE
    Join Date
    Jun 2017
    Location
    Delaware
    Posts
    11
    Rep Power
    1

    Re: Replacing a Previa head gasket.

    Although I want to minimize the work on this job, I decided I better at least replace the valve seals since I have the head off and there are so many miles on the engine. I'm glad I decided to do this as the valves for the cylinder that took the most water were pretty well stuck in the valve guides. I got them freed up. I still have a few valve seals to change. Makes me miss 2 valve per cylinder engines. I did not lap the valves as I don't want to deal with changing shims.

    Name:  20190904_205641.jpg
Views: 41
Size:  75.9 KB

    Finished replacing the valve seals.
    Name:  seals done.jpg
Views: 34
Size:  101.4 KB
    Last edited by tfreed1; 09-07-2019 at 06:06 PM.

  2. #42
    Forum Newbie
    My Van(s):
    1993 2WD Previa LE
    Join Date
    Jun 2017
    Location
    Delaware
    Posts
    11
    Rep Power
    1

    Re: Replacing a Previa head gasket.

    Cleaned up the block deck and it is in good shape other then the pitted area.
    Name:  deck.jpg
Views: 34
Size:  99.6 KB

    After reading about possible options, I decided to use a small bit of JB Weld epoxy in the pitted area.It takes at least 15 hours to cure. I will file it flat before putting the gasket and head on.
    Name:  pit.jpg
Views: 35
Size:  99.8 KB

    Name:  jb.jpg
Views: 34
Size:  98.9 KB

    Here is a SAAB TSB using this solution:
    210_1797.PDF
    Last edited by tfreed1; 09-07-2019 at 09:43 PM.

  3. #43
    Forum Newbie
    My Van(s):
    1993 2WD Previa LE
    Join Date
    Jun 2017
    Location
    Delaware
    Posts
    11
    Rep Power
    1

    Re: Replacing a Previa head gasket.

    I put on the gasket....
    Name:  gasket on.jpg
Views: 28
Size:  99.1 KB

    Torqued the head bolts....
    Name:  head torqued.jpg
Views: 28
Size:  101.1 KB

    And installed cams.
    Name:  cams on.jpg
Views: 28
Size:  102.6 KB

    Will work on connecting all the peripherals and getting the job finished as time permits.

  4. #44
    Administrator timsrv's Avatar
    My Van(s):
    Lots of them
    Join Date
    Jun 2010
    Location
    SW WA ST
    Posts
    5,997
    Rep Power
    10

    Re: Replacing a Previa head gasket.

    Quote Originally Posted by tfreed1 View Post
    Here is a SAAB TSB using this solution:
    210_1797.PDF
    Well that certainly makes me feel better about it. If I ever run into that situation I'll likely give it a try. Looking good! Thank you for the awesome documentation and please keep us posted on how things hold up . Tim

  5. #45
    Forum Newbie
    My Van(s):
    1993 2WD Previa LE
    Join Date
    Jun 2017
    Location
    Delaware
    Posts
    11
    Rep Power
    1

    Re: Replacing a Previa head gasket.

    Thanks. The TSB made me feel better about it too.

    Some additional information that may be helpful:
    I drained the oil the day after the gasket blew and there was quite a bit of water in the oil pan. I drained the coolant and refilled the oil and cranked the fresh oil around the engine using the starter. I did not want to leave water in the oil passages for an extended period of time. When (fingers crossed) the engine starts, I plan on running it for a while and then changing the oil again. I plan on adding straight water first, then draining it before adding antifreeze.
    Last edited by tfreed1; 09-09-2019 at 04:33 AM.

  6. #46
    Forum Newbie
    My Van(s):
    1993 2WD Previa LE
    Join Date
    Jun 2017
    Location
    Delaware
    Posts
    11
    Rep Power
    1

    Re: Replacing a Previa head gasket.

    I finished getting everything together and the engine is running well after a few minutes of smoke from the antifreeze in the exhaust and the oil I used while assembling the head. I ran the engine for about an hour to check for leaks and to boil off the remaining water from the inside of the engine. When it cools, I am going to change the oil, drain the water, and add antifreeze.

    Name:  done.jpg
Views: 14
Size:  98.3 KB

    Name:  manifold done.jpg
Views: 14
Size:  93.5 KB


    I would estimate I've spent 35 hours of actual work time on this job. I spent time getting 26 year old bolts loosened and figuring out what needed to be taken out. I changed the front O2 sensor and had to drill out the studs that were too rusted to get out. I spent a lot of additional time researching how to deal with the head pitting.

    Name:  o2 sensor.jpg
Views: 15
Size:  90.9 KB

    Leaving the engine in the van made the job possible to do on my own. I would not want to pull the engine without help. I also did not need anything other than a floor jack and jack stands to raise the van or the engine.

    While under the van, I found these supports rusted on both sides and will repair them.

    Name:  rust.jpg
Views: 15
Size:  95.1 KB

    I plan on using the van to commute to work and will let you know how it is doing.
    Last edited by tfreed1; 09-14-2019 at 12:16 PM.

  7. #47
    Administrator timsrv's Avatar
    My Van(s):
    Lots of them
    Join Date
    Jun 2010
    Location
    SW WA ST
    Posts
    5,997
    Rep Power
    10

    Re: Replacing a Previa head gasket.

    Awesome! Thanks for taking the time to document!

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •