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Aug 29, 2010 - Uploaded by EricTheCarGuy
How To Torque Cylinder Head Bolts - EricTheCarGuy http://www.ericthecarguy.com/ Well ... What's the reason for changing the torque pattern?Missing: yaris
Toyota 4A/ 5A-FE Cylinder Head Torque:
(a) Apply a light coat of engine oil on the threads and under the heads of the cylinder head bolts.
(b) Install the plate washer to each cylinder head bolt.
(c) Install and uniformly tighten the ten cylinder head bolts in several passes in the sequence.
Torque: 60 N-m (610 kgf-cm, 44 ft-lbf)
HINT: Cylinder head bolts are in length of 90 mm
(3.54 in.) and 108 mm (4.25 in.). Install the 90 mm
(3.54 in.) bolts (A) in intake manifold side positions.
Install the 108 mm (4.25 in.) bolts (B) in exhaust
manifold side positions.
Hi Manuel, There are a number of different engines used in the Corolla, knowing which would be a great help. The engines used in the 1993 are of the 'A' series and 'E' series. The torque for the A series is 29 nm + 90 degrees. When removing the head begin loosening from the outer bolts. When the head is off have it inspected for warpage and skimmed if it is required. Tightening any cylinder head always begins at the middle or centre and works outwards. As my friend has said, the camshaft caps are tightened to 9 nm and the inlet manifold goes to 24 nm, and the exhaust is 27 nm. The tappet cover I think is 29 nm. The tappet cover is tightened on the A series with nuts onto the plug tubes. Regards John
- Connecting rod (big ends). Tighten bolts in several steps. 1st stage 29 NM, 2nd stage, rotate further 90 degrees
- Main cap bolts (crank shaft). Tighten bolts in several steps. 1st stage 44 NM. 2nd stage, further tighten 90 degrees.