TDC dilemma
#17
Three Wheelin'
Join Date: Feb 2007
Location: Indianapolis,IN
Posts: 1,408
Likes: 0
Received 0 Likes
on
0 Posts
Like Tom said. The only place I would mark anything is the notch on the balance shaft sprockets. The marks can be a little difficult to see, especially the lower one. You wont appreciate this until you're head is wedged between the fans and the crank snout, trying to decide if the mark is close enough that you dont need to destroy your shop looking for your inspection mirror....
#19
Three Wheelin'
Thread Starter
eclou - having just gone thru this, I can say that as long as both FW & cam gear are set at TDC and the belt is on with tension, you should have no problems. If they are not in sink you will have issues.
m42racer - I honestly appreciated your concerns. I'll admit...I had some of my own.
m42racer - I honestly appreciated your concerns. I'll admit...I had some of my own.
#20
Addict
Rennlist Member
Rennlist Member
I set the cam at TDC, rotated the crank multiple times to set piston TDC and experienced no resistance or movement of the cam gear. I noticed at TDC of the camgear all but 2 of the lifter buckets are recessed into the tower, and the 2 that protrude on #1 and #4 are barely extended. I cannot imagine that any interference could have occurred.
#21
Quit Smokin'
Rennlist Member
Rennlist Member
eclou, If you did not feel any binding or resistance you are probably just fine. I assume some of the valves for cylinders 2&3 are open at least slightly, so its possible that leaving the cam set at TDC and turning the crank over with some force could mess up your world. I wouldn't try it. The crank is fairly easy to turn by hand when the plugs are out, so there should be no confusion if you were to make contact.
Fluid, I don't know of many things that could be knocking inside the bell housing, I guess a bad throwout bearing or torque tube bearing could make a "knocking" sound. However, if you were able to make the sound using while turning by hand, you may want to check the adjustment of the speed and refrence sensors. If they are contacting the flywheel I'm sure they would make some noise.
Glad you got it running again.
Fluid, I don't know of many things that could be knocking inside the bell housing, I guess a bad throwout bearing or torque tube bearing could make a "knocking" sound. However, if you were able to make the sound using while turning by hand, you may want to check the adjustment of the speed and refrence sensors. If they are contacting the flywheel I'm sure they would make some noise.
Glad you got it running again.
#23
Three Wheelin'
Thread Starter
It's a new TO bearing. If a sensor was that out of adjustment would the motor even start?
TT bearing?? It really never stops...someone should have warned me.
TT bearing?? It really never stops...someone should have warned me.
#25
Quit Smokin'
Rennlist Member
Rennlist Member
I have heard of the sensors contacting the flywheel, and the car keeps running. Makes some interesting noises. The good thing is if you slip them out, you will know right away if that's whats happening or not and it's fairly easy to double check. I don't think I'd be overly worried about the TT bearing, I was just trying to throw out everything off the top of my head that could be making noise in there. If I remember correctly it's not exactly a "while youre in there" for the clutch, as I believe you have to drop the rear suspension.