Reuse existing head studs?
#1
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Reuse existing head studs?
I have an 89 951 with 74k miles.
Head has been off of car 1 other time.
I am putting on a rebuilt o ringed, ported/polished head. Head is flat.
What are your thoughts on reusing the factory studs with new nuts?
Planning on running 17lbs boost on E85.
Head has been off of car 1 other time.
I am putting on a rebuilt o ringed, ported/polished head. Head is flat.
What are your thoughts on reusing the factory studs with new nuts?
Planning on running 17lbs boost on E85.
#3
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#10
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The machine shop pressure tested my existing head and said there were no cracks but that there was evidence of the head lifting.
This makes sense as I had combustion gasses in my coolant tank but no mixing in the oil.
Also the HG when removed was not blown.
I don't know if the mechanic who replaced the HG last time used the new torque specs and I am fairly confident he used the old specs.
Would you guys still use the existing studs?
This makes sense as I had combustion gasses in my coolant tank but no mixing in the oil.
Also the HG when removed was not blown.
I don't know if the mechanic who replaced the HG last time used the new torque specs and I am fairly confident he used the old specs.
Would you guys still use the existing studs?
#11
Rainman
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I have only used the "old" specs without issue but I guess they were revised for a reason.
New studs aren't that expensive (like $5/ea?) if you do want to replace.
If it were my engine I'd just have the head rebuilt and skimmed flat and bolt it back on.
New studs aren't that expensive (like $5/ea?) if you do want to replace.
If it were my engine I'd just have the head rebuilt and skimmed flat and bolt it back on.