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Re: HELP! This is driving me crazy... [LONG]
[Re: RapidRobert]
#358416
06/27/09 01:40 PM
06/27/09 01:40 PM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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Quote:
Quote:
If I have the #1 piston at TDC, how exactly do I check to make sure that the cam is correctly timed?
With the timing marks on TDC #1 compression, #6 should be on "rockover" which means that as you move the crank slightly back & forth(either side of TDC)on the harmonic dampener the #6 lifters will be at the same height & both moving.
Is this the only way to do it without having take off the water pump, timing cover, etc.?
Doesn't some of that the #6 valves are doing depend on the cam profile?
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: HELP! This is driving me crazy... [LONG]
[Re: RapidRobert]
#358418
06/27/09 02:21 PM
06/27/09 02:21 PM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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I had one of those Chinese starters and after three ring gears went back to my old reliable mopar performance on and no more broken ring gears. looks like the Chinese starter holds crooked off the block. A friend had this problem too 3 or 4 ring gears then ground the block till the starter sat nice and straight! I personally won't try that $%@ again. 3 ring gears in 3 weeks sucked big time. only time in 33 years with this car I had a ring gear problem and now 2 1/2 years without a problem again just using my 1991 MP performance one though I had it rebuilt this winter!! 
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Re: HELP! This is driving me crazy... [LONG]
[Re: Dodgem]
#358419
06/27/09 05:09 PM
06/27/09 05:09 PM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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Quote:
I had one of those Chinese starters and after three ring gears went back to my old reliable mopar performance on and no more broken ring gears.
looks like the Chinese starter holds crooked off the block. A friend had this problem too 3 or 4 ring gears then ground the block till the starter sat nice and straight!
I personally won't try that $%@ again. 3 ring gears in 3 weeks sucked big time. only time in 33 years with this car I had a ring gear problem and now 2 1/2 years without a problem again just using my 1991 MP performance one though I had it rebuilt this winter!!
This starter/727/converter combo worked fine with my last motor. Since the starter is bolted directly into the transmission, I don't see how the new engine would have made a difference (if the starter is to blame).
But there could be something that I'm missing... 
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: HELP! This is driving me crazy... [LONG]
[Re: RapidRobert]
#358420
06/28/09 12:32 PM
06/28/09 12:32 PM
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Joined: Jan 2003
Posts: 1,043
Slidell, La.
doctor_mopar
super stock
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super stock
Joined: Jan 2003
Posts: 1,043
Slidell, La.
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The kickback/ backfire can have an effect on shearing the woodruff key in the cam .
------------------------ It doesn't matter what you do.........As long as you look good doing it !
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Re: HELP! This is driving me crazy... [UPDATED]
[Re: doctor_mopar]
#358421
07/09/09 03:06 PM
07/09/09 03:06 PM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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So I took out a new set of teeth today...  I hope that the 4th time is the charm...I'm ordering a new MP starter (instead of the 440 Source one) and I'm going to go ahead and buy a new converter (I'll probably fix and sell the old one once it's out). When I fired up my car earlier today, it back-fired a few times, but only at low RPM. At higher RPMs it seemed fine. Once it was running hot I advanced the timing and I think that the low RPM back-fire went away (the car is VERY loud, so it's kind of hard to tell). This makes me think that my problem ISN'T with the cam timing, but I might replace the cam with a three-bolt soon anyway. I'm thinking that the starter I have just isn't kicking out the bendix far enough, and the high compression is killing the teeth. I hope the new starter solves the problem. More $$$ and time... Any comments / suggestions?
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: HELP! This is driving me crazy... [UPDATED]
[Re: stumpy]
#358423
07/09/09 03:41 PM
07/09/09 03:41 PM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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I have the initial timing set at about 12 degrees BTDC when I start it, and I'm advancing it to about 18 BTDC initial once it's started.
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: HELP! This is driving me crazy... [UPDATED]
[Re: 1968RR]
#358424
07/09/09 08:46 PM
07/09/09 08:46 PM
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Joined: Jan 2003
Posts: 5,789
Hamilton, Ontario Canada
Magnum
master
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master
Joined: Jan 2003
Posts: 5,789
Hamilton, Ontario Canada
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Hard to believe this is because of timing or compression.
I would think if the starter can't turn the engine. It would sit there and melt the starter wire off before it would sheer the teeth off.
If it did have enough nuts to grind off teeth. Why wouldn't it just kill teeth where it is. Not all the way around.
69 Super Bee, 93 Mustang LX, 04 Allure Super
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Re: HELP! This is driving me crazy... [UPDATED]
[Re: Magnum]
#358425
07/10/09 10:15 AM
07/10/09 10:15 AM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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The one thing that I'm sure of is that it's the starter bendix that's taking off the teeth. It's not taking off all of the teeth, just the ones that it comes into contact with. I'm thinking that maybe the 440 Source starter just isn't kicking out the bendix far enough, and the combination of compression and lots of torque (since the bendix is just barely engaging with the teeth) is what's killing the teeth.
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: HELP! This is driving me crazy... [LONG]
[Re: Jwilli500]
#358427
07/11/09 10:35 AM
07/11/09 10:35 AM
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Joined: Nov 2008
Posts: 671
Wisconsin USA
Bill MeLater
mopar
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mopar
Joined: Nov 2008
Posts: 671
Wisconsin USA
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Quote:
Seems like I remember that there was occasionally a slight problem on some big blocks that some of the mini starters actually hit aganst the block and caused a mis alignment. Some slight grinding on the block was necessary? It varied from block to block, you now have adifferent block right? See if a piece of paper will slide between the block and the starter. If it is hitting the block it wont sit square with the transmission.EXACTLY: Not all blocks are the same..The easy fix is to simply grind the starter case instead of the block. Bet that'll fix your problem. 
Quote:
This starter/727/converter combo worked fine with my last motor. Since the starter is bolted directly into the transmission, I don't see how the new engine would have made a difference (if the starter is to blame).
But there could be something that I'm missing...
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Re: HELP! This is driving me crazy... [SOLVED!!!]
[Re: Bill MeLater]
#358428
09/07/09 02:01 PM
09/07/09 02:01 PM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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So I decided to replace my cam, and I noticed that my brand new chain had indeed jumped three(!) teeth on my brand new gears. This is what's been causing the backfire that's been causing my ring gear teeth to get cut off by my starter gear. Why did the chain jump? It may have had something to do with the aftermarket woodruff key that I bought. I noticed when I was removing the old cam, that the crank sprocket seemed loose on the crank/woodruff key. I checked the sprocket on an old crank that I had lying around, and it fit really snug. I don't know how I missed this when I was putting my engine together, but I guess I did. I'm not trying to blame the company that sold the woodruff key (you can guess who they are) since I should have made sure that everything was snug before I buttoned up the engine. Needless to say, however, that I'll be replacing the aftermarket key with a stock on now... I'm just glad I finally figured out what the problem was...3 months later... 
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: HELP! This is driving me crazy... [LONG]
[Re: cptn60]
#358429
09/07/09 04:17 PM
09/07/09 04:17 PM
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Joined: Nov 2004
Posts: 2,825
Sk. Canada
RemCharger
master
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master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
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Quote:
Check your cam timing. damhik 
 
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