Are Lt1 head bolts Tty
01-24-2011, 12:08 PM
#21
ALLDATA Editor's Note
This engine uses the "torque to yield" method of tightening cylinder head bolts. In many cases, the manufacturer does not specify whether the cylinder head bolts can or cannot be reused. When it is specified, it will normally be stated under Cylinder Head Replacement (or Installation), sometimes as a "Notice ", but more frequently in a line such as "Install the new cylinder head bolts. ."
This engine uses the "torque to yield" method of tightening cylinder head bolts. In many cases, the manufacturer does not specify whether the cylinder head bolts can or cannot be reused. When it is specified, it will normally be stated under Cylinder Head Replacement (or Installation), sometimes as a "Notice ", but more frequently in a line such as "Install the new cylinder head bolts. ."
Install the cylinder head bolt finger tight. Tighten the cylinder head bolts in sequence on the first pass to 30 Nm (22 ft. lbs.) .
Use the J 36660 in order to tighten the cylinder head bolts on the second pass.
* Tighten the short bolts (3, 4, 7, 8, 11, 12, 15, 16) 67 degrees.
* Tighten the medium bolts (14, 17) 80 degrees.
* Tighten the long bolts (1, 2, 5, 6, 9, 10, 13) 80 degrees.
Use the J 36660 in order to tighten the cylinder head bolts on the second pass.
* Tighten the short bolts (3, 4, 7, 8, 11, 12, 15, 16) 67 degrees.
* Tighten the medium bolts (14, 17) 80 degrees.
* Tighten the long bolts (1, 2, 5, 6, 9, 10, 13) 80 degrees.
01-24-2011, 12:56 PM
#22
TECH Veteran
You can use the torque/angle method of tightening any bolt (if the information is provided). That does not mean the bolts are TTY type. The t/a method is more accurate that the torque only method.
TTY bolts require the t/a method, but non-TTY bolts can use either method.
01-24-2011, 06:33 PM
#24
Perhaps after GM changed to the t/a method, Alldata decided to make it retroactive.
You can use the torque/angle method of tightening any bolt (if the information is provided). That does not mean the bolts are TTY type. The t/a method is more accurate that the torque only method.
TTY bolts require the t/a method, but non-TTY bolts can use either method.
You can use the torque/angle method of tightening any bolt (if the information is provided). That does not mean the bolts are TTY type. The t/a method is more accurate that the torque only method.
TTY bolts require the t/a method, but non-TTY bolts can use either method.
01-24-2011, 06:47 PM
#25
I've reused the head bolts before, but it is a pain in the ***! Scrape out old sealant, then of course get really messy putting new sealant on the bolts during install. It is much nicer to buy a new set with sealant on them already.
In a financial pinch though, eh I'd reuse the bolts.
In a financial pinch though, eh I'd reuse the bolts.
01-24-2011, 06:52 PM
#26
I've reused the head bolts before, but it is a pain in the ***! Scrape out old sealant, then of course get really messy putting new sealant on the bolts during install. It is much nicer to buy a new set with sealant on them already. In a financial pinch though, eh I'd reuse the bolts.
In a financial pinch though, eh I'd reuse the bolts.
01-24-2011, 07:05 PM
#28
TECH Veteran
01-24-2011, 07:20 PM
#29
Nope, that was everyone else around me. I'm just the poor sucker who gets to work on all this. I've only had head gaskets go on my stock motor and now this motor. None of my engines have needed rebuilding so far. Ok so that isn't quite true, the motor for my truck needs rebuilding, it came to me that way though.
Gizmo they were all 94-95s that I've had to mess with.
I'm just the poor sucker who gets to work on all this. I've only had head gaskets go on my stock motor and now this motor. None of my engines have needed rebuilding so far. Ok so that isn't quite true, the motor for my truck needs rebuilding, it came to me that way though.Gizmo they were all 94-95s that I've had to mess with.
01-24-2011, 10:35 PM
#32
Those are some really cheap bolts. You can actually feel them stretch when you torque them down. The older motors had better bolts. I looked today to see if I still had any from core motors, but I guess I tossed a lot of old junk in my last clean-up.
01-25-2011, 07:17 AM
#36
You guys are hilarious. So my stock motor let the gaskets go around 125k miles. The stock gaskets, yes I reused my 94 head bolts. I put another 40k miles on that motor, no problems. Yanked it to finally install the motor I have now. Mind you I didn't build this motor, gaskets went with approx 40k on motor. I reused the bolts this time as they were aftermarket Manley bolts.I've never had any motor I did head gaskets on come back to bite me. I also didn't know about ls1tech until 1 1/2 years after that first project, I had no idea in 2004 when I did my head gaskets that there were raging battles on the internet over head bolts.
