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Patrick,
Here's the timing tape I ended up using. As you can see, they come in many sizes on one sheet. Good luck with the fix!! |
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Around 95-100 pounds is fine. A dab of red or blue won't hurt. I have seen an ARP damper bolt come loose on the dyno once....
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http://www.clubcobra.com/photopost/d...0/barry001.jpg |
The Continuing Saga...
The new dampner has yet to arrive, but I went ahead and started on pulling off the old one. I picked up the KD Tool Harmonic Balancer Removal & Installation tool. It's like all the rest of them, you have three little claw type things, a big bolt that goes through the middle of it, and a little pole that fits in the bolt and which pushes out in to the crank thus pulling the balancer off.
http://www.clubcobra.com/photopost/d...removal001.jpg Of course, the little triangle claw things didn't fit worth a darn on my existing broken dampner and/or pulley and had a tendency to try and fall off (the dampner was on there pretty tight). The steel claw part comes apart and it was easy to fab up the pulley in front of the steel brace that the big bolt goes through, along with new two inch long 3/8-16 bolts (Grade 5) and hardened washers and then screw those new bolts directly in to the existing dampner. The little copper wire is just there to hold the steel brace lightly on to the pulley so it will self-center. http://www.clubcobra.com/photopost/d...removal002.jpg http://www.clubcobra.com/photopost/d...removal003.jpg http://www.clubcobra.com/photopost/d...removal004.jpg Once done, it comes out slowly, but easily. http://www.clubcobra.com/photopost/d...removal005.jpg http://www.clubcobra.com/photopost/d...removal006.jpg And last, but not least, a shot of my "two piece" dampner. When my new Romac arrives I'll post shots of the install. I think the KD Tool will actually work for that. http://www.clubcobra.com/photopost/d...removal007.jpg |
Harmonic balancer torque specs for a 428FE are 70 to 90 ft.lbs. Forget the spring arm torque wrench. Get a digital or a click type torque wrench. Worth thier weight in gold. I use a torque wrench all the time from lug nuts to torquing spark plugs in aluminum heads!
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ROMAC Arrived
Ahh, the new ROMAC aluminum/steel balancer is a dang nice piece. No timing marks, so I added three white lines at TDC, 10BTDC, 20 BTDC, and a RED line at 35BTDC.
http://www.clubcobra.com/photopost/d...0/romac001.jpg http://www.clubcobra.com/photopost/d...0/romac002.jpg |
Why not just TDC, your initial and total marks? 10 and 20 isn't going to help you.
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"anything worth doing is worth doing right"
Just toss it in a 4th axis rotory and machine marks the full 360 degrees... easy peasy :rolleyes:
or you could get fancy and laser etch it in an indexer... not so easy :( |
I like multiple marks myself, sometimes you need to see the transition from one mark to the next at whatever rpm to consider the timing curve.
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Good luck with it. |
She's On...
The ROMAC is on. A little anti-seize on the snout and the ARP bolt takes her right in. Torqued to 100 ft/lbs with blue loctite. With the slightly larger 7.5" dampner the water pump pulley had to come off as well. Tomorrow I'll put the pulleys back on her, adjust the timing pointer, and that should be it. Note the new-fangled ARP bolt that Barry was talking about. It has the 1/2" drive built in to it.
http://www.clubcobra.com/photopost/d...omac_on001.jpg http://www.clubcobra.com/photopost/d...omac_on002.jpg |
What was the interference number?
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My water pump pulley prevented the Romac from going "straight on." You can see it here (old pic with the original POS damper). It may have actually prevented the original damper the same way. Remember, it came off in two pieces so I'm not really sure. http://www.clubcobra.com/photopost/d...terpump001.jpg |
Let's Put this Thread to Bed...
I tightened, torqued and loc-tited the water pump pulley, crankshaft pulley and double checked the alignment before tightening up the belt:
http://www.clubcobra.com/photopost/d...nerdone001.jpg At the recommendation of one member who had a really bad experience with the outside of a dampner slipping, I added a white line on the pulley, and a white line on the crank bolt, that all line up with the TDC line. http://www.clubcobra.com/photopost/d...nerdone002.jpg Doing that makes it pretty obvious if anything has slipped or loosened -- especially under the timing light. I'm not sure where that original POS dampner came from, but I could tell from how it separated that it was about half a dozen degrees different than the new ROMAC when I put one on top of the other. I'll paint a line on the timing marker next week, after I find my piston stop, that is spot on for TDC -- it's going to be roughly where you see the 10BTDC white line in this little video I shot. You can see how the TDC line aligns with the pulley line that aligns with the bolt line. Here's the vid: Video of the Marks I think that pretty much does it. Thanks to all for their input and help. EDIT -- the follow-up thread on using the piston stop to find TDC can be found here: http://www.clubcobra.com/forums/show...=105245&page=1 |
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