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Post by Harry on Mar 30, 2004 23:43:24 GMT 11
Can anybody tell me the torque settings for the cyl head and rocker gear on a 4jb1t motor?
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wayne
Isuzu Baby
Love mods
Posts: 47
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Post by wayne on Mar 31, 2004 7:22:26 GMT 11
My Frontera manual lists the cylinder head bolts as Stage 1 49nm/36ftlb, Stage 2 angle tighten a further 60deg, Stage 3 angle tighten a further 60deg. I guess you'll need a degree wheel if youb want to do it properly.
Rocker arm pedestal bolts are 54nm/40ftlb.
Hope thats what you are after.
W.
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Post by Harry on Mar 31, 2004 19:22:50 GMT 11
That's what I need thank you.Does the manual mention anything about lubricating the bolts before tightening.The degrees of turn is easy.On a hex headed bolt 1 point or 1 flat is 60 degrees.Also there was a post about tappet clearances a while ago.0.4 mm from memory.Hot or cold?Thanks again,Harry.
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PeterSchurms
Isuzu Junior
Black 95' 3.1 MU Auto in Melbourne
Posts: 132
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Post by PeterSchurms on Mar 31, 2004 21:50:35 GMT 11
Tappets should be set when the cold. I am not sure about bolt lubrication question though.
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wayne
Isuzu Baby
Love mods
Posts: 47
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Post by wayne on Apr 1, 2004 6:50:40 GMT 11
My manual says 'apply a smear of oil to the threads and the underside of the heads of the bolts'
W.
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Post by Harry on Apr 1, 2004 16:31:32 GMT 11
That's exactly what I wanted.Thanks guys.
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Post by rhys on Apr 1, 2004 17:45:21 GMT 11
Do remember to swab out any CRC or oil that got spilt/tipped sprayed down the bolt hols, the hydralic pressure of a head bolt squeezing half a cc of oil down the hole can crack a block... so don't over-oil.  |
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Post by dani4JB1T on Jan 19, 2005 12:00:03 GMT 11
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nealo
Isuzu Baby
Posts: 8
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Post by nealo on Sept 20, 2005 18:33:21 GMT 11
You absolutley must oil the surface where the underside of the bolt-head mates to the cylinder head in all engines. This prevents the headstud from "gripping" the head surface and giving a "false" torque reading, resulting in blown head gaskets.
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