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For the 3.9 head bolts (streach bolts) only use new bolts and follow this sequence: Tighten to 20nm in correct sequence. Then tighten each bolt 90 deg turn in correct sequence. Wait 15 minutes. Then tighten each bolt a further 90 deg turn in correct sequence. Done.
NOTEStep 1: Tighten all bolts to 22 ft. lbs.Step 2: Tighten all bolts to 51 ft. lbs.Step 3: Loosen all bolts, in reverse torque sequence, by 180°Step 4: Loosen all bolts, in reverse torque sequence again by 180°Step 5: Tighten bolts #1 and #2, in the torque sequence, to25 ft. lbs.Step 6: Tighten bolts #3,4,5 and #6, in the torque sequence, 11 ft. lbs.Step 7: Tighten all bolts, in torque sequence, by 80-90°Step 8: Tighten all bolts, in torque sequence, again by 80-90°
{| |- | NOTE Step 1: Tighten all bolts to 22 ft. lbs. Step 2: Tighten all bolts to 51 ft. lbs. Step 3: Loosen all bolts, in reverse torque sequence, by 180° Step 4: Loosen all bolts, in reverse torque sequence again by 180° Step 5: Tighten bolts #1 and #2, in the torque sequence, to25 ft. lbs. Step 6: Tighten bolts #3,4,5 and #6, in the torque sequence, 11 ft. lbs. Step 7: Tighten all bolts, in torque sequence, by 80-90° Step 8: Tighten all bolts, in torque sequence, again by 80-90° |}
Tighten the bolts to 60 nM (44 ft. lbs.) in sequence. Tighten the bolts to 60 nM (44 ft. lbs.) in sequence.
Every proper wrench will tighten or loosen bolts. -If this is a riddle or joke, please enter it in that category.
The torque loading for head (and many others) bolts varies with the engine concerned. It is important to check the manufacturers handbook to ensure the correct loading is applied. It is also important to tighten the bolts on the sequence indicated in the manual and by increments to the final loading. If no sequence is given then it is good practice to tighten from the centre out. For most 'standard' car engines it will be around 50 ft lb.
no the gasket should be rubber and should be bendable all you do is install it in the correct position and tighten the bolts in the right sequence
for 88 thru 95 Step 1. Tighten all 10 bolts in sequence to 14 ft/lbs (20 Nm). Step 2. Tighten all 10 bolts in sequence to 36 ft/lbs (49 Nm). Step 3. Tighten all 10 bolts in sequence to 49 ft/lbs (67 Nm). Step 4. Tighten bolts 1 and 2 to 49 ft/lbs (67 Nm) again.
I just did an intake manifold job on a 1999 5.7L suburban. The intake manifold to the heads, note this sequence....from front to back on the passenger side 7,1,3,5......from front to back on the drivers side 8,4,2,6. Tighten # Tighten the bolts on the first pass in sequence (1-8) to 3 N·m (27 lb in). # Tighten the bolts on the second pass in sequence (1-8) to 12 N·m (106 lb in). # Tighten the bolts on the final pass in sequence (1-8) to 15 N·m (11 lb ft). Use Loc-tite blue on these bolts and follow the above sequence and torque levels.
Install the lower intake manifold to the engine. Apply sealer, GM P/N 1052080 or equivalent, to the lower intake manifold bolts.Install the lower intake manifold bolts. Tighten the bolts in three steps:TightenTighten the bolts on the first sequence to 8 N·m (71 lb in).Tighten the bolts on the second sequence to 12 N·m (106 lb in).Tighten the bolts on the final sequence to 15 N·m (11 lb ft).I this is what you are looking for.GMmechanic@gmail.com
It is strongly recommended that new head bolts are used with threads LIGHTLY oiled.use an angle gauge to measure tightening angels.If your motor is fitted with hexagonal headed bolts-1) tighten in correct sequence to 58Nm2) slacken 1st bolt in sequence then immediately tighten to 20Nm then immediately through 120 degrees, proceed in this way until all bolts tightened3)refit all of the rest of the engine components ensure that all fluid levels are correct and its safe to start motor.start motor allow it to idle until cooling fan starts.switch off motor allow it to cool for a minimum of two hours.4)repeat process described in number 2) above.That's it done.If fitted with Torx type bolts,from early 19871)tighten in sequence to 60Nm2)slacken all bolts then tighten each in sequence to 20Nm3)further tighten in sequence each bolt through 300 degreesjob done no need for re-tightening after warm up.
Make sure you have the correct sequence Step 1 Short Bolts 43 Long Bolts 46 Step 2 Tighten an additional 90-degrees