What is crankshaft torque? - Cars & Trucks

First of all,
Torque standards are essential in the field of automobile engineering because they guarantee the correct assembly and operation of engine components. The crankshaft main bearings are one of these parts that is essential to keeping the crankshaft supported and the engine running smoothly. This essay explores the meaning of torque measurements for the main crankshaft bearings in a 1.4 Opel Astra carburetor engine, emphasizing their utility, typical values, and the consequences of applying torque correctly.
Torque's Importance in Engine Assembly:
In engine assembly, torque-which is the rotational force imparted to a fastener-is essential. Bolts, nuts, and other fasteners are guaranteed to be tightened to the manufacturer's requirements by proper torque application, which avoids under- or overtightening, which can result in component failure. lead to component distortion or damage to the threads. For the purpose of fastening the bearing covers to the engine block, preserving alignment, and avoiding excessive bearing wear in crankshaft main bearings, precise torque application is crucial.
Torque Reading for Crankshaft Main Bearings: Depending on the engine model, year, and manufacturing standards, different torque values for the crankshaft main bearing caps may apply to the 1.4-liter Opel Astra carburetor engine. But as a general rule of thumb, comparable engines often have torque requirements in the range of 60 to 70 Newton-meters (Nm), or around 44 to 51 pound-feet (lb-ft). These numbers are essential for attaining the correct clamping force required to hold the bearing caps in place without distorting or harming the constituent parts.

The Significance of Applying the Right Torque: Applying the right torque is crucial for a number of reasons:
Component Integrity: Using the proper torque guarantees that the engine block's bearing covers are firmly secured, preventing any movement or loosening while the engine is running.
Bearing Performance: By minimizing friction and wear on the bearing surfaces, the correct clamping force applied by torque application aids in maintaining exact alignment of the crankshaft main bearings.
Sealing: Sufficient torque guarantees correct sealing between the engine block and the bearing covers, stopping oil leaks and preserving lubrication effectiveness.
Engine Balance: By applying torque uniformly to each bearing cap, you can improve engine balance and smooth running, which lowers noise and vibration.
Procedure for Applying Torque: There are multiple processes involved in getting the required torque reading for the primary bearings on the crankshaft.
Prepare the engine block and bearing surfaces by making sure they are spotless and free of pollutants or waste.
Lubricating fasteners: To minimize friction and obtain precise torque measurements, lubricate the threads and bearing surfaces with the specified lubricant.
Sequence: To uniformly apply the clamping force to each bearing cap, according to the tightening order recommended by the manufacturer.
To avoid unequal loading or distortion, slowly reach the final torque value by gradually tightening the bolts in several steps.
Verification: To guarantee accuracy and consistency, use a calibrated torque wrench to confirm the torque readings following torque application.
of summary, correct engine assembly and operation depend on an understanding of the torque readings for the crankshaft main bearings of a 1.4 Opel Astra carburetor engine. Automobile enthusiasts and technicians can guarantee the integrity of the product by following manufacturer standards and using the appropriate torque settings dependability and durability of the engine's parts.
In addition to promoting optimal engine performance, proper torque application improves safety and lowers the chance of premature component failure. In order to maintain and repair car engines, it is imperative to pay close attention to torque readings. This enhances vehicle dependability and increases customer satisfaction.

Mitsubishi Mighty Max crankshaft bolt Questions & Answers ...

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Mitsubishi Mighty Max cars & trucks crankshaft bolt questions and answers. ...Torque specs for mighty max The head torque specs for 1991 mitsubishi mighty max 2.4 I ... 1989 mitsubishi 2.0 motor crankshaft was turned while timeing belt was off. ...how to install a clutch kit on my 1994 mitsubishi mighty max Disconnect the .

B: INSTALLATION
1) Install the crankshaft pulley.
2) Install the pulley bolt.
To lock the crankshaft, use ST.
ST 499977400 CRANKSHAFT PULLEY
WRENCH
(1) Clean the crankshaft pulley thread using an
air gun.
(2) Apply engine oil to the crankshaft pulley bolt
seat and thread.
(3) Tighten the bolts temporarily with tightening
torque of 44 N·m (4.5 kgf-m, 33 ft-lb).
(4) Tighten the crankshaft pulley bolts.
Tightening torque:
127 N·m (13 kgf-m, 94.0 ft-lb)

From FSM:

B: INSTALLATION
1) Install the crankshaft pulley.
2) Install the pulley bolt.
To lock the crankshaft, use ST.
ST 499977400 CRANKSHAFT PULLEY
WRENCH
(1) Clean the crankshaft pulley thread using an
air gun.
(2) Apply engine oil to the crankshaft pulley bolt
seat and thread.
(3) Tighten the bolts temporarily with tightening
torque of 44 N·m (4.5 kgf-m, 33 ft-lb).
(4) Tighten the crankshaft pulley bolts.
Tightening torque:
127 N·m (13 kgf-m, 94.0 ft-lb)

main bearings torque is 18 ft lbs. plus 90 - 94 degrees, rod bearings torque is 13 - 16 ft lbs. plus 90 - 94 degrees.crankshaft damper bolt torque 80 - 94 ft lbs, fly wheel bolts torques 94 - 101 ft lbs.

look for timing marks????
Align groove of crankshaft timing pulley with mark on oil pump.
Align the marks on the camshaft timing pulleys with the corresponding dots on the front plate. (i can email pic if needed)
When timing marks are aligned, no pistons will be on T.D.C.
install timing belt. Align the dotted alignment mark on the timing belt with the mark on the crankshaft gear.
For correct belt installation, the letters the belt must be able to be read as viewed from the front of the vehicle. It is recommended for easy installation that the belt be secured with double clips after it is installed to each pulley. Align the alignment mark (white line) on the timing belt with the alignment mark on the RH bank camshaft timing pulley (on the left side as viewed from the front of the vehicle Secure the belt with a double clip.
Align the alignment mark (white line) on the timing belt with the alignment mark on the RH bank camshaft timing pulley (on the left side as viewed from the front of the vehicle Secure the belt with a double clip.
Turn the crankshaft counterclockwise to remove the belt slack between the crankshaft timing pulley and the RH bank camshaft timing pulley.
Install the belt on the water pump pulley. Remove double clips from pulleys. Turn the crankshaft pulley clockwise by two turns. Measure the rod protrusion to ensure it is within the standard. Standard 4-6 mm (0.16-0.24 in)


13) If out of standard, remove pusher, loosen adjusting bolt, and readjust. (Repeat from step 11). Tighten adjusting bolt to the specified torque. Torque 42 N-m (31 lb-ft)

1. Pusher

• Tighten bolt to the specified torque.

Torque 19 N-m (19 lb-ft)

1. Timing belt cover

• Remove crankshaft pulley that was installed in step 9.
• Tighten bolts to the specified torque.

Torque 17 N-m (12 lb-ft)

1. Oil cooler hose

• Tighten oil cooler hose bracket bolts to the specified torque.

Torque 22 N-m (16 lb-ft)

1. Crankshaft pulley assembly

• Using special tool J-8614-01, hold the crankshaft pulley.
• Tighten center bolt to the specified torque.

Torque 167 N-m (123 lb-ft)

1. Crankshaft pulley; P/S belt

• Tighten fixing bolt to the specified torque.

Install the belt on the idler pulley.

Disconnect battery earth lead. Do not turn crankshaft or camshaft whn timing beld removed. Remove spark plugs to ease turning engine. Turn engine in normal direction of rotation (unless otherwise stated) Do not turn engine via camshaft or other sprockets. Observe all tightening torques. Remove engine, remve RH engine mounting. Remove auxiliary drive belts, water pump pulley, crankshaft pulley, timing belt upper cover, timing belt lower cover. Turn crankshaft clockwise to TDC on No. 1 cylinder, slacken tensioner bolts 5 & 6. Move tensioner away from belt and lightly tighten bolts. Remove timing belt. Remove water pump and replace with new one. Suggest to replace cambelt as well.
Installation
Ensure timing marks aligned3 & 4. Fit timing belt in anti-clockwise direction, standing at crankshaft sprocket. Ensure belt is taut between sprockets on non-tensioned side. Slacken tensioner bolt 5. slacken tensioner bolt 6. Allow tensioner to operate. Tighten tensioner bolt 6. Tighten tensioner bolt 5. Turn crankshaft on turn clockwise. Ensure crankshaft sprocket timing marks aligned 4.
Slacken tensioner bolt 5. Slacken tensioner bolt 6. Allow tensioner to operate. Tighten tensioner 6. Tighten torque: 20 - 26 Nm. Tighten tensioner bolt 5. tighten torque: 20 - 26 Nm. Apply thumb pressure to belt at middle. Approximately 5kg. Belt should deflect to 1/4 of tensioner bolt head width 7. Belt tention can also be set using burroghs (BT-33-73F) tension gauge 10 at middle. Turn crankshaft 90 ° anti clockwise. Check belt tension is 9.5 16,5kg (engine must be cold). Install components in reverse order of removal. Fit cranckshaft pully. Tighten crankshaft pully bolts 8. G4-J: Tightening torque: 12-15Nm.
G4-N/G4-k: Tightening torque: 10-12Nm
G4EA: Tighten crankshaft pully bolt 9. Tighten torque: 140-150Nm.

if your installing your crankshaft the Torque: 27 N·m (275 kgf·cm, 20 ft·lbf). And for your camshaft the 25mm bolts [2] are 7.5 N·m (80 kgf·cm, 69 in.·lbf) and the rest are 16 N·m (160 kgf·cm, 12 ft·lbf)

not sure if this link will help you out... Torque spec for 1993 stealth RT front crankshaft pulley bolt Google Search