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Rounded of hex bolt in engine cylinder head

2K views 3 replies 4 participants last post by  tails13 
#1 ·
Hi

i have a .30 Nosram and one of the 4 hex bolts in the cylinder head has rounded itself off. I can get the other 3 out, but the 4th one has rounded off and just doesnt move

Any ideas or options? other than a new engine
 
#3 ·
Hi

i have a .30 Nosram and one of the 4 hex bolts in the cylinder head has rounded itself off. I can get the other 3 out, but the 4th one has rounded off and just doesnt move

Any ideas or options? other than a new engine
I just bought a bulk lot of engines and needed to drill out about 20 of the bolts, quite easy, if it's a 3mm bolt just hold it flat and square in a vertical drill and use a nice sharp 1/8th (3.2mm) drill bit and carefully drill the head off, it will break loose and stay on the drill bit, then lift the head off and undo the 'stud'.
BB
 
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