The World's Tightest Bolt

[GreenPump]

So, my first timing wrestling with the 1HD-T crankshaft pulley / harmonic balancer bolt. It's kicking my ass.

I tried bumping the starter; disconnect fuel cutoff solenoid, long breaker bar. Starter doesn't have the guts to break it lose.

I then proceeded to snap my SST #09330-00021 in half doing it the way the factory manual recommended.

Thoughts? Suggestions?

 

[duncanrm]

Any mates got a big ass 18V impact wrench?

 

[ceylonfj40nut]

Any mates got a big ass 18V impact wrench?

^^^ this. Get some penetrating oil and light heat to it.

 

[GreenPump]

Any mates got a big ass 18V impact wrench?

I was kinda hoping not to have to take off my radiator, intercooler and the entire front clip to fit an impact.

 

[Squash]

Having done this job twice.
Once one the side of the road in a snowstorm between Revelstoke and Roger's Pass with the tools I had on board....got me home 4000km away.
Pull the rad, batteries and whatever.
You can lock in low up against a solid object, go to a big truck tire shop and get a huge torque wrench.
Put it back together with the best loctite and torque to specs.

 

[GreenPump]

Having done this job twice.
Once one the side of the road in a snowstorm between Revelstoke and Roger's Pass with the tools I had on board....got me home 4000km away.
Pull the rad, batteries and whatever.
You can lock in low up against a solid object, go to a big truck tire shop and get a huge torque wrench.
Put it back together with the best loctite and torque to specs.

I'm pulling everything off right now. I kind of came to the same conclusion as you.

Interesting enough, the "Gregory's" aussie manual says to jam a prybar into the inspection port to stop up your flywheel ring gears.


I've got a buddy coming over with his air tank and 1/2 impact. I think it's good for about 750ft/lb loosening.

 

[AirheadNut]

I don’t have any direct experience with them, but I’ve heard that weighted impact sockets really help too.

 

[GreenPump]

On a side note.... any of you 80 series folks. I need to turn up a factory non-EGR 1HDFT crossover pipe.

I'm sure someone has ripped one off for an intercooler. I tried classifieds but haven't had much luck

 

[GreenPump]

I went out and bought a 20v dewalt impact. Zipped it off like nothing. Had to rip the whole front apart though.

Machine shop is making me a special tool out of 1/2" steel. It will go over the balancer and connect to all 6 (or 4 for 1HDFT) bolts. Super beefy.

 

[yOHda]

I wrestled with one on a 2jz engine recently. I bought the car cheap because the mechanic chip couldn’t get the crankshaft pulley bolt out. I went through 3 breaker bars before I figured it out.

For anyone else that ever wrestles with this.


Step 1: buy a new bolt from Toyota.
Step 2: cut a t or x in the head of the stuck bolt to relieve tension.
Step 3: unthread bolt by hand.

 

[TheBussman]

or heat up the bolt with an oxy-fuel torch. that always works.

 

[AussieHJCruza]

or heat up the bolt with an oxy-fuel torch. that always works.

Don't overdo this on the harmonic balancer

 

[duece71]

Someone on here made a plate to help with getting that HB bolt off. I bought the plate and will probably tackle this job when the water pump and timing belt need to be done again. I don’t remember whom made/sold the plate.

 

[GreenPump]

Someone on here made a plate to help with getting that HB bolt off.

The big advantage of having the plate/SST is that you save a lot of time in disassembly/assembly. The plate "tool" is thin enough to fit in between your front steering damper/support, and brace against the frame rails on either side.

I have now parted with the last of my Hilux with the 3L engine, but with those engines you must remove the harmonic balancer and crankshaft bolt when performing timing belt/water pump routine maintenance. The SST was more than up to the task, and I have removed and re-torqued many of them. That being said, we are talking about 173ft/lb for the 3L engine vs. 365 ft/lbs on a 1HD-T. I was surprised that the factory service tool was the same stainless-steel arm, with a different attachment for the pulley.

I will post a picture of the tool when I pick it up from the machine shop, and report back on how it does with re-torquing. On all the 3L crank bolts, I used Loctite 242, I plan to do the same with 1HD-T. I may invest in a longer 1/2 breaker bar, I think a 4ft bar will fit under the truck.

As a last resort I have now bought that Dewalt 20v impact, which was on sale at Lowes. Tool #DCF900, allegedly it is good for 1400ft/lbs of breakaway torque, which I have no way to test, but it sure made short work of that crank pulley bolt.

 

[HDJ80L]

Had a similar experience not on the LC but with the axle nuts on my Supra, just couldn't get them to break loose with the air impact even with heat (~800ft/lbs breakaway torque). Borrowed a big Dewalt impact with the same 1400ft/lbs and they came off fairly easy, amazing tool.

 

[GTSSportCoupe]

I made a tool kind of like this (not my picture, but right idea). I made it four feet long. I have a four foot breaker bar too that is 1/2" drive. Easy Peasy.