Question about 1987 Yamaha SDR

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93 artic cat jag head torque pattern and specs

Leaking oil around the head gasket wondering what the torque should be for the new gasket

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  • nuttbysteve Feb 13, 2009

    Thank-you!!!

  • Anonymous Mar 15, 2014

    Torque for head gasket in a 2008 R1

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The best place to find it is the service manual. if not avail. i usually 1, tighten it to ~10-20Nm in a 'outwards spiral' fashion, ie start tightening from centre bolts outwards. 2, spiral tighten by 1/4 turn, 3, another 1/4 turn, and 4, final 1/4 turn.

Posted on Feb 13, 2009

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Posted on Jan 02, 2017

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11_20_2011_2_46_10_pm.gif

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Oil leak in engine.Replaced the head gasket now oil is leaking somewhere in the engine. put in new head bolts 2 times but couldn't torque to specs. Why is there oil leaking and how can I find out what the...


Well, you might check the real main seals. Also, if you cant torque them to specs, the head could still be leaking. Your best bet is to lay a piece of cardboard under it and see where the oil drips from. Then trace the leak up from there. Otherwise, raking it to a shop might be your only resort. Good Luck.

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1994 4runner, six cyl. putting rebuilt heads on, toyota head gaskets, new head bolts "tvs 10.9". Torqued bolts in pattern to 33 foot pounds. another 1/4 turn in the pattern. and into my next and final 1/4...


REMOVE 3 BOLTS MAKE SURE YOU HAVE THE RIGHT THREADS.IF BOLTS LOOK OKAY.YOUR BOLTS HOLES HAS DEBRIS OR OIL AND ANTIFREEZE IN THEM.OR YOUR BOLT HOLES IS STRIPPED.YOU HAVE TO REMOVE HEAD TO FIX THE THREAD PROBLEM.IF YOU HAVE NOT MADE THE FINAL TORQUE TO CRUSH AND SEAL HEAD GASKET THE. HEAD GASKET PROBABLY ALRIGHT.YOU HAVE TO LOOSEN HEAD BOLTS IN SEQUENCE BACK OFF A LITTLE AT EACH BOLTS.IF HEAD GASKET LOOK DAMAGE AT BOLT HOLES REPLACE HEAD GASKET.

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When torquing items today very little is done with just "numbers" in the process. Now you have to have an angle meter to complete the process so when you see me say to torque a specific number "plus so many degrees", this is how it's done. This is the meter:df03f54.gif Now, Here are the specs for installing the head:
Cylinder Head Bolt
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22 lb ft
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Here is the sequence shown in picture form:
e8f4606.gif Also, you will need to discard the old bolts because they are "torque to yeild" bolts and CANNOT be reused. The reason: "Torque to yeild" bolts actually stretch during the torque process and once they've gone through this process they can't be reused because they no longer are able to "clamp" the head because they are too long. Hope this helps your repair project.








Oct 10, 2009 | 2002 Chevrolet Cavalier Coupe

1 Answer

1996 5.7 running to rich after replacing the heads, distriputer,plugs wires valvegaskets but now mprs about 8 miles and blacksmoke pretty bad increasing to around 3000rpms and missing often at a idle


I have to ask you few tough questions. You may reply via email later.


Did you send the heads out to CNC milling and re-seat all the valves?

Did you use new head bolts?

Did you use Indian Head (picture on the bottle) head gasket sealer?

Did you torque the bolts in the correct pattern and pressure?

====

The first thing to check is the intake manifold gasket leak.
Used a little Berman clear to spot check for leak around the manifold leak(s)

====

Monitor the coolant and oil level.

====

Black smoke is un-burn fuel.

Did you inspect the injectors?

Did you change the Fuel Rail O-Rings.


A dripping or poor spray pattern can lead to all the problems you posted.


===

I would use a bottle of Lucas or Seafoam fuel system cleaner and hope it's just few poor performing injectors.

Please email me you answers and I will have a better picture on hold to trouble shoot you Chevy.


Good Luck

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THE ROCKER COVER GASKET IS LEAKING OIL INTO SPARK PLUG TUBES OR HOLES VERY COMMON

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