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I have never heard of such a problem with Tim's Tool. This tool doesn't apply any pressure to the head bolts at all. All of the tension is applied to the heat treated stud that is supplied with the tool. I cant think of any possible way to break head bolts with this tool
| That's not what I meant. Tension from the metal plate is applied to the stud, which is threaded into the head. There is a known history of those "studs" breaking in the heads.
Such case is also mentioned in JmX's ls1howto website:
"The stamped steel "crowbar" shaped spring compressor available from AutoZone/Napa, and is what I show in this document, however it has a history of breaking bolts off in the head! Use this tool at your own risk!" 
Now, you specified that "tim's stud' has been heat treated. Are you 100% certan that it will not break while compressing ?
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2001 Red Camaro SS, M6; FMS F10 cam 228/228 .576/.576 LSA 112, Patriot Golds, ASP Pulley, Yella-Terra Rockers, 160 degree Hypertech Thermostat, Modified SLP "Loudmouth Exhaust" w/ Borla XR-1, Air box with K&N filter, MACs with custom catted Y-pipe, KONI DA/SA shocks, Hotchkis 1" lowering springs, SVO 42# Injectors.
325 rwhp, 333 rwtq, 1/4-mile ET 13.4 sec @ 106 mph(stock)
390 rwhp, 385 rwtq (modded) |