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V8 Head bolts


Sabre
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I 'm busy replacing head gaskets on a friend's V8 3.9i Disco. The head bolts that we removed were VERY tight. So much so that I initially thought they were "stretched bolts" They appear not to be. To my knowledge stretch type bolts narrow just below the bolt head. The ones that we removed are straight.

The LR manual indicates that, for the 3.5, 3.9 and 4.2, head bolts with suffix B needs to be torqued in 3 stages, of which the last 2 are through 90 degrees each. Which I presume are the specification for the stretched bolts. They, however, indicate 2 different bolt lengths.

Engines who do not have suffix B, have a final torque figure only, and I take it that that is for non-streched bolts. But they indicate 3 different length bolts

The engine Im working on has only 2 different length bolts. Would they be stretch type or not ? Can I re-use the bolts that I took out ?

Thanks

JZ

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I 'm busy replacing head gaskets on a friend's V8 3.9i Disco. The head bolts that we removed were VERY tight. So much so that I initially thought they were "stretched bolts" They appear not to be. To my knowledge stretch type bolts narrow just below the bolt head. The ones that we removed are straight.

The LR manual indicates that, for the 3.5, 3.9 and 4.2, head bolts with suffix B needs to be torqued in 3 stages, of which the last 2 are through 90 degrees each. Which I presume are the specification for the stretched bolts. They, however, indicate 2 different bolt lengths.

Engines who do not have suffix B, have a final torque figure only, and I take it that that is for non-streched bolts. But they indicate 3 different length bolts

The engine Im working on has only 2 different length bolts. Would they be stretch type or not ? Can I re-use the bolts that I took out ?

Thanks

JZ

Oh, forgot to mention that the engine has suffix C

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