Are Lt1 head bolts Tty
A lot of debate on this and I don't think there is a proper decisive answer. IMO if some are TTY it would have started around 96-97, a lot of folks have reused stock bolts and I believe at least on the earlier years GM approved reusing them once.
Pretty sure the 96 motor I tore down had a different looking bolt than the several 94-5 motors I have torn apart.
Pretty sure the 96 motor I tore down had a different looking bolt than the several 94-5 motors I have torn apart.
My 95 camaro had TTY bolts as well. I replaced them with ARP's which I believe are re-usable. I always look at it as its cheaper to just buy new ones, then tear it down again for a over stressed head bolt that may cause some expensive problems.
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From: Little Rock, AR
I say the bolts are not TTY. I have researched this many times and find nothing to indicate they are. The torque/angle method for tightening (does not require TTY bolts) was introduced in the factory manual for 1996. The long and short bolt part numbers for the head bolts never changed 93-97 (the medium bolts did change p/n for some reason). They would not have mixed TTY and non TTY bolts on the head and they could not have used TTY bolts in early years without specifying the torque/angle method of tightening they must use.
My 95 had no TTY bolts..
My 95 had no TTY bolts..
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Joined: Dec 2008
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From: Little Rock, AR
Pretty confusing that the stock bolt part number is the same 93-97, but later years used different bolts? Does not make sense to me.
I guess this is why this question never gets resolved.
shbox, part numbers are superceded so often I would not count on PNs to figure this out.
My experience is along the lines of what WS Sick said.
Tomorrow I might even be able to find examples of each.
I will say if in doubt replace.
I do wish this question could be answered more definitively.
I definitely trust GIZMO's input on things so I would throw out the possibility of a mid-year change.
My experience is along the lines of what WS Sick said.
Tomorrow I might even be able to find examples of each.
I will say if in doubt replace.
I do wish this question could be answered more definitively.
I definitely trust GIZMO's input on things so I would throw out the possibility of a mid-year change.
TECH Veteran
Joined: Dec 2008
Posts: 4,147
Likes: 62
From: Little Rock, AR
shbox, part numbers are superceded so often I would not count on PNs to figure this out.
My experience is along the lines of what WS Sick said.
Tomorrow I might even be able to find examples of each.
I will say if in doubt replace.
I do wish this question could be answered more definitively.
I definitely trust GIZMO's input on things so I would throw out the possibility of a mid-year change.
My experience is along the lines of what WS Sick said.
Tomorrow I might even be able to find examples of each.
I will say if in doubt replace.
I do wish this question could be answered more definitively.
I definitely trust GIZMO's input on things so I would throw out the possibility of a mid-year change.
I agree with replacing with ARP bolts in any case. I did it on mine.
Last edited by shbox; Jan 24, 2011 at 08:15 AM.
Can you explain several of us having reported finding different style bolts in early vs. late motors?
I understand your thinking but at the same time the manual lists thermostat housing torque in ft.lbs so it is not to be completely trusted, a TTY note could have been forgotten.
I understand your thinking but at the same time the manual lists thermostat housing torque in ft.lbs so it is not to be completely trusted, a TTY note could have been forgotten.
TECH Veteran
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From: Little Rock, AR
Can you explain several of us having reported finding different style bolts in early vs. late motors?
I understand your thinking but at the same time the manual lists thermostat housing torque in ft.lbs so it is not to be completely trusted, a TTY note could have been forgotten.
I understand your thinking but at the same time the manual lists thermostat housing torque in ft.lbs so it is not to be completely trusted, a TTY note could have been forgotten.
I would say parts books are often more accurate than the manual.I know what you are saying and I am not sure that everyone would know a TTY bolt from a regular bolt if they saw one. I am not sure I could prove it, myself, not having worked with a lot of them. I have not torn down a late model or seen pics or comparison of the bolts people are talking about. I am also not calling anyone out on it. I sometimes like to see things with my own eyes to be convinced. If it is so, it is so or we can leave it at some are and some are not. LOL.
Until this thread, I have not seen anyone claim they pulled out TTY bolts from an LT1. They only said "somebody told me they were supposed to be TTY. Is it true?"
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From: Little Rock, AR
