I've got a 360 here right now that has the crank bolt so tight that I'm pushing through the brakes. I've never had one this tight. I've heated it with a torch and it's still turning over the engine, through the brakes. I'm watching the wheels turn as I push the breaker bar. I'm a big guy and I've got a big guy in the car on the brakes. I know there is a flywheel lock tool, but I've never had to use one. If it's this tight is that going to help?
Having the right tools makes all the difference. Also pretty hard to justify extra normal procedures to a client when the correct tooling and procedures are not used. I always use the flywheel locking tool and have never needed a second person to perform the operation. All that said who knows if that tool will get you where you need to be but the correct way needs to be tried first.
I was thinking the same thing. I suppose it could hammer rod bearings to use an impact in that application.
Better tell the factory that. Not to mention every mechanic for the last 75 or so years with compressed air at his disposal.
Not in the car. Besides, a good breaker bar gives you more torque. Like I said before, right tools for the job.
Like this courtesy of Ricambi: http://www.ricambiamerica.com/advanced_search_result.php?keywords=95973207&osCsid=1998157e2445f5faebc3a7486ac6d2c1&x=7&y=8 Image Unavailable, Please Login Image Unavailable, Please Login
Too bad about the impact wrench, worked great on my 348. Here's an even crazier idea: When I changed the timing belt on my MR2 years ago, the method recommended by someone was to put a breaker bar on the crankshaft nut, with the other end of the breaker bar against something solid, then hit the starter for a millisecond. Worked like a charm. Now whether the engine in a Ferrari turns the correct direction, or if I would be willing to risk doing that procedure on a $$$ Ferrari is a whole different question.
Which gear do you have it in? Try 6th instead of 1st - has made all the difference in the past for me.
Take the under shield off the car. Undo the screen under the transmission and lock the ring gear in place. Losen the crank bolt with a 36mm socket. I have never had one not come out. Work from under the car, much eaiser. The method your using holding the brakes could result in the belt sheering teeth off of it, and as a result you could bend a valve if the teeth on the belt suddenly let go
Seeing as the 360 uses cam drive pullys, rather then just running the belts off the crank, you might be OK, doing it as described. But it give me the willies to think what could happen if that belt slipped. When you step on the brake, you are not locking the crank. You are trying to turn the engine against the force of the brakes. Turning the engine results in a lot of stress on the belts when trying to overcome the brakes. The entire cam drive system wants to turn with the crank. When you lock the crank, you are completely locking the engine from moving. All the force you put on that bolt will be used to loosen it, not trying to turn the wheels. The poster even said the back wheels were still turning even though his helper had his foot on the brake. That a lot of force placed on the rotating assembly of the engine, including the belts.
But the cam drive system is just a slave to the crank at that point. There is no more stress on the belts, compared to turnining over the engine by hand, and there is no more risk to the belts compared compared to a locked crank, unless you consider the engine rotating a risk to the belts... Though, that would be bad news for running your Ferrari
Well..for me its better to be more safe then sorry I guess..I tend to over think things sometimes. Carry on....
Howie, the turning action on the crank pulley nut sends it's force straight on down the crank to the clutch, gearbox, tranny, driveshafts, brakes. Any movement affecting the timing belts is just the normal movement that would occur when the engine is running. No special force going through the belts at all. OP, I would have thought that using the highest gear (as already suggested) should do the trick unless there's something wrong with the brakes. You can also pre-tension your breaker bar into a good position for leverage by pushing the car forward or back (assuming wheels on the ground). Locking plate is probably best though. Perhaps you could make something up like this ....... http://www.ferrarichat.com/forum/142883214-post61.html
A couple of questions What size is the bolt (MM) Head size? Are you using a 1/2 in or 3/4 inch socket and breaker bar? If you are using a 1/2 socket go buy a 3/4 socket and breaker 3/4 bar or ratchet. The 1/2 inch just flexes too much A note on impacts. The new 1/2 inch electrics are unbelievable. The largest Snap On one is the most powerful 1/2 inch I have ever used. Bolt Break Away Torque, ft. lbs. (N•m) 620 (840) Stock # CT6850P Name Impact Wrench, Cordless, 18 Volt, Pinned Anvil, Slide-on Battery, 1/2" Drive (U.S.) Price** $605.00 Brand Snap-on Country Of Origin USA Anvil Type Pinned Battery (qty) CTB4187 (2) Battery Capacity 2.5 Ahr Battery Charger CTC620 Battery Type Ni-Cad 2.5AHr Battery Voltage 18V Blows per Minute, BPM 2,100 Bolt Break Away Torque, ft. lbs. (N•m) 620 (840)
It is 36 mm, 1/2" should be fine - worked for me. You cannot get an impact gun on it with engine in car. Jes
If you are still having problems, and you don't want to try the starter trick noted above, a gentler way to possibly achieve the same effect would be to put the wheels on, put it in gear, and roll the car slightly to determine if 5th gear or reverse will turn the engine in the desired direction to then put the breaker bar on the nut, fix the handle to a chassis member with zip ties, disengage the clutch, have someone push the car a bit, pop the clutch and hopefully that will do the trick.
Just lock the crank, like Brian said. You can even wedge a large screwdriver against the flywheel or make a simple tool to do the job. The factory tool from Ricambi is only $271 and will be reused every three years or so. Pays for itself if you count your labor hours.
I agree. lock the Flywheel. i have never had a problem undoing a crankshaft bolt , & i have done it more than 100 times
