Cars & Trucks - Recent Questions, Troubleshooting & Support
2000 Ford courier PE 2.5L turbo diesel. Just want to retorque head and tappet cover. Need sequence and tension settings. Put a brand new head on car 4 months ago.
I don't know the settings - they are often supplied with the gasket set these days.
Wanted to mention a couple of things...
Tightening sequence starts in the middle and works outwards - some manufacturers use a spiral pattern while others remain with diagonal opposites, though unless the head is quite wide with a large number of bolts the sequence makes little difference and I usually opt for the spiral but if the head (4 cylinder) is like that of the Perkins and many older engines with upwards of a dozen bolts the diagonal method is best.
If the head bolts are the stretch type (most modern engines are), the bolts are angular torqued by degrees rather than lb-ft. In this case some manufacturers specify further tightening immediately after the first thorough warmup and cooling cycle, cooling for 6 hours before tightening the final 30 degrees or whatever.
No further tightening is necessary or recommended.
If the original bolts aren't the stretch type a torque wrench will have been used for tightening and a later retorque is wise. The engine should be thoroughly cold and each bolt should be slackened and retightened in turn - important the bolt should be kept in motion until the torque wrench clicks.
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