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Old 12-31-2015, 01:01 PM
Zulfiqar Zulfiqar is offline
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Join Date: Nov 2010
Location: TX
Posts: 3,566
please bear in mind that the tool needed to undo the head bolts is not a triple square, its a bi hex driver - it may sound the same (12 is 12 right)

the problem is the angles between the teeth on the tool.

This is also used to undo toyota cylinder heads - and people on the internet complain that toyota tighten it too much - so much so that their "triple square" tool breaks.

If you use a bi hex socket - it wont break . I bought mine from snap on - it was surprisingly cheap. - The snap on tool is short meaning you need to remove more stuff to access the bolt heads.

the difference between the tool head shapes is this

I believe the old 61x engines had the XZN bolts.
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