is it bad to over tighten the head bolts a little bit? i torqued them at 20 ft punds and that felt like nothing so i went a little more like a half a turn more
over tighten?
- Thread starter 89blaster89
- Start date
What did you go to, because half a turn is one heck of a lot.
Over tightening will put stress on the threads in the jug,.
It should be ok if you were only just over 20 ft lbs, but half a turn more would be excessive.
I would be taking them off and doing it again because when the head and jug warm up during the heat cycles something nasty could happen if they are way too tight.
Remember about things you were taught in primary school about expansion and contraction.
20 ft lbs is what is specified, not more because you think it was not tight enough.
i already did the heat cycles lol and i just remembered that i went over 20 ft pounds, should i just take it all apart and re do it all?
Tough call right there. You would either need a new gasket or anneal the old if you do loosen/retorque. Did you go in the pattern specified? Did you torque in steps? I go like 10, 15, then 20 . That's why I like a click torque wrench, no guess work.
If you went well over 20 ft lbs the damage is already done,.
Leave well enough alone, re tension to 20 ft lbs and pray that the studs are still firmly planted in the jug.
If they hold 20 then you may have got away with it, good luck.
im just going to take it all apart tonight and re-do it all correctly. i wouldint mind it as much but this right bend pipe is a pain to take off and on
and yes i always torque in the correct pattern and go 10-15-20
Listen to Blaaster, don't touch it. You can only make it worse.
If it is damaged, the damage is done, redoing it will not fix anything.
Start it up. Heat cycle it. If it leaks you'll feel it around the head.
If it leaks you have to pull the jug and get the stud threads repaired in the cylinder.
More is not always better. More is often too much...
The whole point of higher level engineering is "just enough".
Steve
When I find a little time I am going to set up a test to see what tension half a turn of the wrench will read in ft lbs on a head nut.
Well it got the better of me, I found my old dial wrench, put it on a nut of similar size and tourqued it up to 20 ft lbs.
I then proceeded to turn the nut 180degs (half a turn more) and watched as the ft lbs increased.
I did it very carefully in fear of the stud breaking, but it held as it reached 55 ft lbs.
Take note my test was done with the stud inserted into a steel block.
I cannot imagine how an aluminium block could survive.
I then proceeded to turn the nut 180degs (half a turn more) and watched as the ft lbs increased.
I did it very carefully in fear of the stud breaking, but it held as it reached 55 ft lbs.
Take note my test was done with the stud inserted into a steel block.
I cannot imagine how an aluminium block could survive.
I agree,I would have to believe the head studs would not hold 55ft lbs and would have pulled out by now.
