Need to replace timing belt and can't undo the harmonic balancer nut, have been trying to turn anti clockwise, also jammed socket bar against car body and engaged starter motor, still no good, also tried holding a bar in bottom teeth on cog that timing belt attaches to but can't hold it
First, don't hold bar on cog as you will damage those and ruin it. Using the starter is a good way to damage starter or flywheel.
Soak the bolt with PB Blaster or WD40 and let is soak for a day. Use a large impact gun (3/4 or 1") with plenty of air flow and pressure.
If that does not work, then use a torch to heat the bolt head (not red hot or anything like that), then strike the bolt head straight on with a brass rod using a heavy hammer (32oz or so). This will break any corrosion that has welded the bolt head to the balancer.
Then use your wrenches again.
If that does not work, then try this: How to remove stuck harmonic balancer bolt
SOURCE: Trying to change the timing belt on a 2003 Hyundai
you can put a breaker bar and socket on the bolt and unplug a) the injectors or b) the coils so it wont start and crank it over like 2 times put the breaker bar on the pulley with the handle of the breaker bar touching the ground and u crank it and it'll break free
SOURCE: I need to replace the harmonic balance seal.
THE thread is a std Left hand to undo But you will need a 3/4 drive100 lbs air rattle gun to both undo and redo up the bolt on front pully.. BUT there is another way and that is as you say a big breaker bar and a good socket, but you will have to take off the starter motor and put a good fitting bar into the starter ring teeth and turn it to the top and dont let it slip out of the teeth and once locked into place gently put pressure on and undo the bolt..
But its unusual for the seal to leak on its own as its mostly due to either the front pully has worn a grove in it or the crankshaft bearing is also worn, so check the front pully for wear first. Ron
Testimonial: "This is good advice. Pretty much along the lines of what I was going to do but it is good to get confirmation from someone who knows. Cheers"
SOURCE: I need to replace my timing belt but when I tried
yes!! you need to pull the harmonic balancer !! and the center nut i do believe...is a 22 mm and yes you will need a puller
SOURCE: remove a very tight bolt from the crankshaft
have ya sprayed it with WD40 and let it soak in 4 awhile
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