Raptor Head bolts
#2
#4
Raptor Head bolts
In a perfect world they should be replaced every time . When you pull a bolt to toque it stretches the threads some what they will eventually loose there draw or "elastic state " and stretch out or go " Plastic " on you .
I believe the YFZ head bolt are ( toque to yield ) and they definitly should only be used once .
One other thing id you are reusing nuts flip them over sounds crazy but the threads will flex back the other direction
I believe the YFZ head bolt are ( toque to yield ) and they definitly should only be used once .
One other thing id you are reusing nuts flip them over sounds crazy but the threads will flex back the other direction
#6
Raptor Head bolts
well the head bolts dont stretch that much its the threads in the aluminum that are pulling out over time. the holes are only good for 3- 4 torque sessions. then will require heli-coils. DO NOT run a tap into the threads to clean them up because it will take material away that is used to hold the bolts in. you must use a thread chaser.
#7
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#8
Raptor Head bolts
Sparkskiller I disagree . All bolts stretch . When you torque a bolt you are stretching it and it is pulling back like a rubber band . If you over torque it loses it's elastic state and fails to pull and then it just keeps on stretching . Thats why torque values are so important . Also the cases (aluminum) are enginered with a certain amount of draw area to offset the bolts pull . I have had aluminum blocks that have had countless tear downs and reapps with NO failures .
Just always make sure the bolts or studs are lightly lubed You can still use locktite if nessacary but in small amounts .
Just always make sure the bolts or studs are lightly lubed You can still use locktite if nessacary but in small amounts .