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KLW
AMC Nut Joined: Sep/02/2012 Location: MN Status: Offline Points: 488 |
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Posted: Aug/14/2022 at 11:46am |
Hi Guys! I am building a 401 that has a bad front cover. I've heard some are better than others because some wear out dizzy gears prematurely. I'd like to hear which ones you guys have had success with. Also, has anyone used the dorman one? Thanks Guys!
Edited by KLW - Aug/16/2022 at 7:49pm |
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1981 Spirit
(420 cu in stroker - 570 hp) 1966 Ford Fairlane Convertible (331 Cu In - 450 HP) |
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rgsauger
AMC Nut Joined: Aug/17/2014 Location: Houston,TX Status: Offline Points: 311 |
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About everyone on here is gonna tell you to find a good used oem one from a 304, 360, etc. what’s wrong with your cover?
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KLW
AMC Nut Joined: Sep/02/2012 Location: MN Status: Offline Points: 488 |
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It's wearing the dizzy gear and the motor only makes 30 lbs oil pressure.
I've heard the crown and the bull tear are good replacements.
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1981 Spirit
(420 cu in stroker - 570 hp) 1966 Ford Fairlane Convertible (331 Cu In - 450 HP) |
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mramc
AMC Addicted Joined: Jul/12/2007 Location: United States Status: Offline Points: 3217 |
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Crown is Chinese and has the usual 50% poor machining rate. Bull Tear has a JIG that is used to check the timing covers for correct machine tolerances. If you get a new cover you want to get it from Bull Tear. I know there a CHivy vendor out there trying to sell all the rejects that do not meet the correct specs. LRDaum
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LRDaum
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Heavy 488
AMC Addicted Joined: Apr/27/2019 Location: In the Status: Offline Points: 3529 |
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Is it the original distributor gear or was there a swap involved?
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KLW
AMC Nut Joined: Sep/02/2012 Location: MN Status: Offline Points: 488 |
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Well, I was down to bulltear or Crown. I think if Bull Tear makes a non-nickel plated cover, that's where I'll go. Thanks!
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1981 Spirit
(420 cu in stroker - 570 hp) 1966 Ford Fairlane Convertible (331 Cu In - 450 HP) |
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KLW
AMC Nut Joined: Sep/02/2012 Location: MN Status: Offline Points: 488 |
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two originals in 5,000 miles or less. It's not my motor so I don't have all the details. My and a friend are going to be rebuilding it for the guy and we want a good cover so this doesn't happen again. I have never had this happen with an original cover. So, being those are tough to come by, I was looking for a good replacement aftermarket one
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1981 Spirit
(420 cu in stroker - 570 hp) 1966 Ford Fairlane Convertible (331 Cu In - 450 HP) |
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BU1
AMC Addicted Joined: Aug/11/2016 Location: MN Status: Offline Points: 1973 |
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You said above that it is eating distributor gears?? Have you verified that the oil slot on the face of the cam gear is aligned properly? Most all new gears need the groove re worked. What do you see that is making you lay blame on the 2 original timing covers?
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AMO #2726
#1 1968 AMX Rally Green 343 Z code 4spd since 1975 #02642 #2 1968 AMX Rally Green 290 N code 4spd since 2019 #02959 |
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KLW
AMC Nut Joined: Sep/02/2012 Location: MN Status: Offline Points: 488 |
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No, I only have the one front cover that is aftermarket. I ate 2 oem dizzy gears.
Plus, I only get about 30 lbs of oil pressure at 4,000 rpms.
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1981 Spirit
(420 cu in stroker - 570 hp) 1966 Ford Fairlane Convertible (331 Cu In - 450 HP) |
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KLW
AMC Nut Joined: Sep/02/2012 Location: MN Status: Offline Points: 488 |
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Yes, the slot seems to be right. Should I deepen it or is there some other fix for it?
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1981 Spirit
(420 cu in stroker - 570 hp) 1966 Ford Fairlane Convertible (331 Cu In - 450 HP) |
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