mondial t 1992 cylinder head torque settings | FerrariChat

mondial t 1992 cylinder head torque settings

Discussion in 'Technical Q&A' started by Peppi, Aug 17, 2007.

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  1. Peppi

    Peppi Karting

    Mar 15, 2004
    75
    UK Wales Cardiff
    Just looking for confimation that for the cylinder head acorn nuts torque settings stated in the workshop manual makes me understand that they should be set to 60 Nm plus 90 degrees ,seems not very tight for cylinder head torque down ,can anyone help with this and kindly give me the procedure also for tightening these cylinder heads down ,as in torque settings and degrees to finish off .
    I have tried to look for the answer in the old ferrarichat archives ,put my pc for some reason is not allowing me to go to link, Thankyou for any kind replies.
     
  2. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
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    The Bad Guy
    I don't know off the top of my head but that sounds about right.

    A couple of months ago I pulled the head off my Integra and replaced the head gasket. The torque specs for the head bolts were 61 ft/lbs. Keep in mind this in on a Honda engine and these things run for a LONG time. It had just under 274,000 miles on the motor before I pulled the head. So the 60NM spec + 1/4 turn sounds right. Just make sure you are tightening the bolts down in the proper pattern, starting from the inside of the head working out, alternating back and forth in a crisscross pattern.
     
  3. ernie

    ernie Two Time F1 World Champ
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    Nov 19, 2001
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    Okay Peppi, I just looked it up in my book and that is the correct spec. (It's for a 348, but the Modial T has the same engine) Here is what it says in my book:

    1 - Use Molikote grease on the stud thread and the sliding surface between the nut and the washer.

    2 - Tighten all the nuts in order shown in Fig. 6 to a torque of 60Nm (6kgm). Ensure that adaptor AV1393 is at 90*deg to the torque wrench arm when turned.

    (Just so you understand, there is an "especial tool" :D that fits inside the head. I looks sort of like a box end wrench that has been bent up in a L-shape. Maybe Daniel-Son can post a pic of it for you? Oh yeah, about the order of tightening down the head bolts. Since I don't have a pic of it, I'll just give you the order in which they get tightened down from Fig.6)

    Fig.6 :p

    7 - 3 - 1 - 5 - 9
    10 - 6 - 2 - 4 - 8

    Continuing...

    3 - Turn the nuts through a further 90* in the specified order. Use wrench (tool no.95970034) with adaptor AV1393 t check the angle. Because the nut is housed in the head in such a way that it cannot be turned through 90* at one go, proceed as follows to carry out the last stage.

    a - Connect tool No.97950034 between AV1393 and a T wrench with a 1/2" fitting.
    b - Fix the magnet at the end of the cable to a metal previously fixed to the engine block.
    c - Turn the red dial to zero.
    d - Tighten the nuts as much as possible and read the angle off the goniometer.
    e - Remove the wrench and return to it's original position before inserting it in goniometer. Turn the dial until it has returned to the previous reading.
    f - Tighten the nut and read the new angle off the goniometer.
    g - Repeat the operation a few times (2 or 3) until the required 90* angle is obtained.


    Hope this helps.

    Happy wrenching.
     
  4. lusso64

    lusso64 Formula 3

    Apr 12, 2004
    1,535
    Simi Valley
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    David
  5. ernie

    ernie Two Time F1 World Champ
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    LOL!

    That be the one.
     
  6. lusso64

    lusso64 Formula 3

    Apr 12, 2004
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    Daniel's away for the weekend, so when the cat's away...... :D
     
  7. Peppi

    Peppi Karting

    Mar 15, 2004
    75
    UK Wales Cardiff
    Just wanted to add , I have also noticed in the workshop manual that it gives two other alternative tightening sequences for tightening the cyl head on the 348 engine , it says 80 Nm plus 40 degrees ?, and also 120 Nm plus 60 degrees ? , just wanted to ask why does it give these alternatives , and obviously the torque settings are much higher too ? , again can someone please explain to me , it just that I wanted to understand why it gives these alternatives and higher settings too ?.
    Thankyou to all that replied to my first question ,Thanks.
     
  8. ernie

    ernie Two Time F1 World Champ
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    Because the books are written like crap.

    Actually the latter specs are for use with the tool that is listed with them.

    The book says:

    Alternatively:
    if a S.P.S. Sensor 1 wrench, type 125FLT-B or similar, is available, this maybe used with the following parameters:


    Then it goes on to list the specs you gave. So unless you have that tool I wouldn't worry about those.
     
  9. lusso64

    lusso64 Formula 3

    Apr 12, 2004
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    Published by Charmin :)
     
  10. ernie

    ernie Two Time F1 World Champ
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    I'm guessing these guys publish pop-up books?


    LOL!!!!
     
  11. Peppi

    Peppi Karting

    Mar 15, 2004
    75
    UK Wales Cardiff
    Thankyou once again Ernie and Lusso for your help , I have now fitted the cambelt , it took me four hours to set the cams spot on , I can crack on with the rest now ,

    Also I was wanting to know ,

    1) Torque settings for the four camsprocket bolts ,

    2) Torque setting for cambelt tensioner idler bolt,

    3) Torque setting for cambelt idler bearing bolt,

    Once I have these settings from you kind expert people I can completely finish off the cambelt fitting.

    Thankyou once again Peppi.
     
  12. ernie

    ernie Two Time F1 World Champ
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    I can answer, but since Dave just finished doing this job I'll let him "take the mic".
     
  13. Mark 328

    Mark 328 Formula Junior

    Nov 6, 2003
    510
    Orange, Ca
    Full Name:
    Mark Foley
    My 2 cents...
    If you are just retightening during the course of a belt change, the specs may be different. I think some people just retorque them--there have been threads on this. There is a 328 service bulletin that says to check them by torquing to 52Ftlbs, then if one is loose to go thru the whole process. You may want to check if there is a SB for the 348?

    Mark
     
  14. Peppi

    Peppi Karting

    Mar 15, 2004
    75
    UK Wales Cardiff
    Mark thanks for your kind reply .

    Ernie I will await for Daves reply for the torque settings ,thankyou once again.
     
  15. lusso64

    lusso64 Formula 3

    Apr 12, 2004
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    #15 lusso64, Aug 18, 2007
    Last edited by a moderator: Sep 7, 2017
  16. lusso64

    lusso64 Formula 3

    Apr 12, 2004
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    Charmin - as in toilet paper :) So more like poop-up books... But anyway, I wouldn't waste paper printing these manuals out. Even the latest parts manuals have obvious errors.
     

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