Question about 1987 Mitsubishi Passenger
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Posted on Jan 02, 2017
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.
Posted on Feb 15, 2009
SOURCE: Why is it important to
If it's tightened within reason it is ok, but an overtightened bolt can put to much pressure on other parts, or break, and if it's under to much pressure from being overtightened it can snap under use. Also if under tightened it can come loose, or leave to much variance in other parts. If you can get it somewhat close it will not be a problem, if it says to use a specific locktite I'd also recommend using the correct kind. Good luck.
Posted on Mar 30, 2011
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