Mitsubishi L200 4d56 engine cylinder head bolt torque

SOURCE: Mitsubishi

The following is verbatum from the mitsu engine overhaul manual... Steps 7 and 8 are a bit cryptic, but it seems like after you tighten the bolts to 20nm in the CORRECT PATTERN... you then go around tightening 1/4 turn through the pattern, then a final 1/4 turn through the pattern... do NOT tighten each bolt to 20, the 1/4 then another 1/4 before going to the next bolt, the idea is to get EVEN tightening across the head, so tighten her three times around the pattern! Now for the verbiage from Mitsu's overhaul manual...


(1) When installing the cylinder head bolts, check that the
shank length of each bolt meets the limit. If the limit is
exceeded, replace the bolt. - Limit: Max. 96.4 mm (3.79 in.)
(2) Install the washers.
(3) Apply engine oil to the bolt threads and washers.
(4) According to the tightening sequence, tighten the bolts to
75 Nm (54 ft.lbs.).
(5) Loosen the bolts completely.
(6) Torque the bolts to 20 Nm (14.5 -ft.lbs.)
(7) Tighten the bolts l/4 turns (90”) more.
(8) Tighten the bolts l/4 turns (90”) additionally.

Jun Magno

• 175 Answers
• Posted on Jun 02, 2009

SOURCE: Blown head gasket

i think you are reffering to a 4D56 engine. just type 4D56 workshop manual .pdf download on your browser and you fill find several free downloads. everything you need to overhaul the engine is there

danoyachtcap

• 2907 Answers
• Posted on Jun 30, 2011

SOURCE: torque the cylinder head bolts

Try this
I dont know which engine you have.

420a
1. Torque all center bolts to 25 ft-lbs, torque the 4 corner bolts to 25 ft-lbs
2. Torque all center bolts to 50 ft-lbs, torque the 4 corner bolts to 50 ft-lbs
3. Re-Torque all center bolts to 50 ft-lbs, re-torque the 4 corner bolts to 50 ft-lbs
4. Tighten all bolts in the sequence from #1-#10 an additional 1/4 turn.

7-Bolt 4G63
1. Torque all bolt to 58 ft-lbs in order
2. Loosen all bolts completely to 0 ft-lbs
3. Torque all bolts to 15 ft-lbs in order
4. Tighten all bolt 1/4 turn in order
5. Tighten all bolts an additional 1/4 turn in order.

ARP Head Studs
1. Tighten all bolts to 40 ft-lbs
2. Tighten in steps of 10 ft-lbs increments until the specified torque that you are looking for is reached. This can vary with the amount of boost you plan on running.