Help! 351 Windsor cam gear and distributor gear keep grindin off! - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 10 (permalink) Old 06-30-2007 Thread Starter
Rookie
5.0L Member
 
pimpenstang's Avatar
 
Joined: Jan 2007
Location: Austin
Posts: 14
 
Exclamation Help! 351 Windsor cam gear and distributor gear keep grindin off!

This is the second build on my 351 Windsor. It is a carburated 5.8, with performer rpm heads, 1.7 rockers, msd distributor and ignition set up, comp cams extreme energy race cam,and blah blah blah...Anyway this is the second time I have ground the gear off my distributor and cam, this time around I did put all new cam, distributor, oil pump, eveything in it, less than 50 miles on motor after dyno break in and poof!!! It started popping and there she went again!! Is the guy who built it a moron or what is going on here??? Can someone please shed some light on this???Thanks
pimpenstang is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 06-30-2007
GT Member
S197 Member
 
jgard07's Avatar
 
Joined: Apr 2007
Location: Eastern
Posts: 1,159
 
What type of cam have you been running, cast flat tappet or steel roller? And what type of distributor gear, iron or bronze? Sounds like you're having a problem with incompatable materials.

07 GT premium in Grabber Orange. 5spd. manual w/ a few bolt-ons.
jgard07 is offline  
post #3 of 10 (permalink) Old 06-30-2007 Thread Starter
Rookie
5.0L Member
 
pimpenstang's Avatar
 
Joined: Jan 2007
Location: Austin
Posts: 14
 
I am running a hydrolic flat tappet cam and the distributor had a steel gear on it
pimpenstang is offline  
post #4 of 10 (permalink) Old 07-05-2007
MACH I Member
Classic Member
5.0L Member
 
The Greek's Avatar
 
Joined: Nov 2006
Location: Jacksonville
Posts: 3,184
 
Can you see if there is a wear pattern on the distributor gear or is it too far gone? The wear pattern should be approximately centered on the gear. The dist. gear may have been installed on the dist. shaft in the wrong position.

There is also a conflict in the material this gear is made of. For a flat tappet cam the dist. gear should be made of either cast iron or bronze and not the hardened steel required for a roller cam. Some people also use the bronze gear on roller cams, but this isn't an issue here. ---Chuck
The Greek is offline  
post #5 of 10 (permalink) Old 07-08-2007 Thread Starter
Rookie
5.0L Member
 
pimpenstang's Avatar
 
Joined: Jan 2007
Location: Austin
Posts: 14
 
Angry

I messed up we had a steel gear the first time this happened to the motor this time we had a cast iron gear on there.

We also called the msd tech line they claim that we MUST have too much oil pressure...well thats funny because we are running a complete stock oil pump and when we had it dyno tested all our oil pressure was perfect, not at all on the high side.
The way the gears look like they are hitting is that the angles between the gear on the cam and the distributor are different.
pimpenstang is offline  
post #6 of 10 (permalink) Old 07-10-2007
MACH I Member
Classic Member
5.0L Member
 
The Greek's Avatar
 
Joined: Nov 2006
Location: Jacksonville
Posts: 3,184
 
From what you say the dist. gear is installed upside down. Is the roll pin that secures the dist. gear on top of the gear?
The Greek is offline  
post #7 of 10 (permalink) Old 09-04-2007 Thread Starter
Rookie
5.0L Member
 
pimpenstang's Avatar
 
Joined: Jan 2007
Location: Austin
Posts: 14
 
the gear was installed properly. It was brand new. We figure we found the trouble though. We decided after all the bs to tear it apart ourselves pulled the timing chain cover off and the cam bolt fell out and had about three threads left on it.Beautiful, huh? Well we figure either mr builder boy didnt tighten it or he "forgot" to put lock tight on it. Needless to say he replaced everything out of his own pocket
pimpenstang is offline  
post #8 of 10 (permalink) Old 09-06-2007
MACH I Member
Classic Member
5.0L Member
 
The Greek's Avatar
 
Joined: Nov 2006
Location: Jacksonville
Posts: 3,184
 
Thanks for the update. ---Chuck
The Greek is offline  
post #9 of 10 (permalink) Old 09-06-2007
Apprentice
Classic Member
 
TheBarberShop's Avatar
 
Joined: Feb 2006
Location: Arlington
Posts: 68
 
Was gonna tell you to check cam end play for a "walking" cam before I saw your update!

Out of the bad distributor gear complaints I see i'd say 95% are caused by improper cam installations. Dist gears are much weaker than the cam gear -- and thank goodness, it's easier to pull a distributor! They make newer dist gears with silicon/bronze alloys, etc, but they're not a solution, more of a band-aid fix.
TheBarberShop is offline  
Rookie
 
ralc's Avatar
 
Joined: Sep 2010
Location: Davidson
Posts: 4
 
MSD distributor problems

I had 2 problems with an MSD distributor.
The first problem was where the shaft is cut down below the gear for the oil pump drive. There was a .060" extended below the gear. I didn't know any better and pit it in. It bound up in the block and sheared the gear. I sent it back to MSD and they sent me a new distributor. This 1 had the bottom of the gear flush with the shaft cut. I put it in, snugged it down and started to set the timing when the distributor spun. I figured i just didn't have it tight enough but as I tried to tighten it down, it was not seating it against the block. Took it out and the bottom of the gear looked scraped. Pulled it out out and took it to an ignition shop. They put it in a bare block and showed me that the gear was installed too far down the shaft. from the distributor housing where it contacts the block to the bottom of the gear, it was 4.095. Said it should be 4.031-4.038. They also said there should be a minimum of .020" between the housing and the shim/collar. They also showed me a new MSD gear and a Ford Motorsport gear The MSD gear had the roll pin hole in the wrong location. They installed the Motorsport gear and it works great.
ralc is offline  
Sponsored Links
Advertisement
 
 

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in









Random Question

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183