#32
|
|||
|
|||
Quote:
Quote:
Here's the setup you are working with. - The big bolt with 27mm head holds the outer "balancer" tight to the crankshaft. - The four small bolts with 6mm inhex heads hold the timing gear to the back of the balancer (they thread into the timing gear). So, the crank turns the balancer, which turns the timing gear, which turns the timing belt. In other words, no, the timing gear is not sandwiched between the balancer and the end of the crank. The timing gear is like a donut and just floats behind the balancer on the outer perimeter of the crank snout, it has no internal flange. The big bolt exerts no force or contact on the timing gear -- only on the balancer. Thus if you do as you say, jbg, and remove the big central bolt, then no there isn't any risk of the whole sandwich falling apart. But what WILL happen is that the key in the timing gear (which again does not fit very tight in the crank keyway) will be the only thing maintaining engine timing in position. So you'd get some timing drift. And worst case, the entire balancer and gear assembly could work loose from the crankshaft as you tried to work on the inhex bolts. This is just $0.02 here, but I think if I were in your position, trying/preparing to deal with those mutilated inhex bolts, I would simply not worry about them for now. The good news is that they are in there and seem to be tight so they're not a functional threat, just an obstacle for service. It will be a battle to try to do anything with them in situ, with them on the engine down there in a hard to reach location.... but, you don't have to do anything with them there. Instead my move, whenever the time comes that you want to change the timing belt, would be this: - Loosen and remove the big center bolt (this is after bringing engine to near TDC, other timing service preliminary steps etc as per greenbook) - Use tool 5187 per greenbook to bring engine back to TDC with the center bolt removed - Loosen timing belt using your preferred method - REMOVE the entire balancer/timing gear assembly from the crankshaft as one combined unit, with the 4 inhex screws still in place and tight. Now you have the assembly on the workbench where you can easily attack it with impact tools and/or heat.... or, most likely easiest of all, simply use a large drill bit and drill the heads off those bolts. Then separate the two parts, unscrew what remains of the bolts from the timing gear, and replace the hardware with new. Fun to watch all the progress, cheers!
__________________
86 745 D24T/ZF 345k lifted 2.5" 83 764 D24T/M46 155k |
|
|