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Messages - Rob Roy

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1
FE Technical Forum / Re: 428 flywheel index relaive to crank
« on: June 03, 2016, 04:38:24 PM »
OK there is like 0.010 to 0.015 in clearance between the header and the top of the steering box.
You mean to tell me that is causing the constant vibration?
I need to have a good feeling of what it is before I remove the trans, bell housing etc. from underneath the jacked up car.
yes I still have to bump the engine over to see where the flywheel counter weight is to the crank.
I removed the inspection cover and everything is tight.
Thanks
Any more insight?
Rob

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FE Technical Forum / Re: 428 flywheel index relaive to crank
« on: June 02, 2016, 05:40:29 PM »
Ok Guys
Like I said I installed JBA Headers in the car, There the Tri Ys.
I was wrong I think they are contacting the top portion of the steering box.
Could that be it?
I characterize the vibration as annoying and not just light. hard to describe.  It is Not something that you get use too.
I have never driven a car with solid motor mounts so I cant even describe the level.
Rob

3
FE Technical Forum / Re: 428 flywheel index relaive to crank
« on: June 02, 2016, 05:04:40 PM »
The vibration is constant no noticeable difference through rpm range.
FYI I did install JBA headers while the engine was out.  Close fit but no contact. (Remember to reverse idler arm bolts so the Head is inside engine compartment)
Its not a motor mount, I had one go bad in a Torino so I know all about that.
I just pulled the drive shaft, every thing feels smooth.
No I did not think to index the yoke when I replaced the u joints. That vibration would be worse at a certain RPM correct?
I still need to remove the inspection pan to check orientation of the counter weight with respect to the crank counter weight.
I know its time for new flywheel.  But the only reason why they must of fiddled with the holes is for balancing.  Bozos
So a new flywheel will not do me any good because I could still be out of balance.
I will keep you informed.
Thanks
Rob

4
FE Technical Forum / Re: 428 flywheel index relaive to crank
« on: June 01, 2016, 09:44:55 PM »
I like your methodical approach to this.
Clutch is brand new Mcleod 11.5 inch same size as what came out.
I changed the U joints, both front and rear.
Did I index the drive shaft? No, never had in any of my mustangs.
You bring up a good point.  I will pull the drive shaft tomorrow and check out the U joints.
I will get back to you.
Thanks again for the help and interest.
Rob

5
FE Technical Forum / Re: 428 flywheel index relaive to crank
« on: May 31, 2016, 06:32:17 PM »
Once again I appreciate the replies.
The engine has performed well for 20 years plus.
The holes do not look mushroomed in any way, they are machined.
When I installed it after I had it ground I new it had to go on one way.
When all the bolts were in and not tight you could not rotate the flywheel relative to the crank.
its not a pure oversize issue.
I slowly rotated it until all 6 bolts lined up.  There must be another position.
I did have the harmonic balancer rebuilt but that should not mater for a 428 PI.
I had in my mind that a McLeod flywheel is the way to go.
I cant take a picture yet. The concern is cracks right?
I don't want to beat a dead horse.  I will have the fun job of removing everything from under the car to get at the flywheel.
Thanks
Rob

6
FE Technical Forum / Re: 428 flywheel index relaive to crank
« on: May 30, 2016, 07:41:28 PM »
Let me follow up
The holes in the flywheel are not excessive.
When I reinstalled I thought there was only one way for it to go back on.
the holes are not over sized, Just elongated.
The engine has been running great. I purchased the car in 1998.
I appreciate everybody's input.
I am curious why they the machine shop who rebuilt it (Prior to my ownership) would mess with the holes in the flywheel.
Rob

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FE Technical Forum / Re: 428 flywheel index relaive to crank
« on: May 30, 2016, 12:40:08 PM »
Thanks to every one who took the time to reply so quickly.
I have no Idea why they would of done this, that is elongate the holes.
The engine was nice and smooth before I removed the flywheel and had it resurfaced.
The picture tells me what I want to know the fly wheel weight lines up with the rear counter weight.
I do not beat on the car.  I am hesitant to just go by new flywheel.
The flywheel is a true 428 flywheel because it has the integral counter weight.
I am puzzled why they had to elongate the holes.
Calls into question what else is funky with the balanced assembly.
My plan is to see where the flywheel counter weight is relative to the rear crank counter weight and if it is off then to index it so its weight is aligned with the crank.
Sound ok?
Thanks all
Rob

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FE Technical Forum / 428 flywheel index relaive to crank
« on: May 30, 2016, 07:06:21 AM »
Looking for help
I removed my 428 to replace cracked exhaust manifolds.
So it was a good time to replace the clutch.
I thought nothing about removing the fly wheel to get it resurfaced.
Well when it was time to put it back on the crank I noticed the mounting holes on the flywheel were elongated.
I rotated the flywheel to align the holes with the crank and thought I had it right because there still seemed to be only one way.
Now after putting the engine back it and driving it I have a vibration through out the RPM range so I figure the fly wheel is not mounted correctly.  My question is which counter weight of the crank lines up with the weight on the fly wheel.  It must be either the front or rear counter weights of the crank which are obviously 180 degrees apart.  I figure once I know the orientation of the crank and know where to align the fly wheel I will all set. 
Thanks for the help
Rob
 

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