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401 rebuild |
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odd401
AMC Apprentice Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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Posted: Oct/15/2014 at 7:36pm |
just dropping 401 in again,it ran for about 5 minutes and shelled the cam gear,dist gear barely has any damage,pulled it back out ,had the shop come get it last week,made them bring it back to me today,they did not start it,should i continue installing it?i paid to have it pre ran and be present during,didnt happen,they pre ran it and charged me 300 bucks,asked to pre run this time and was told they wont do it again.what would you do?thanks
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ghinmi
AMC Addicted Joined: Apr/04/2010 Location: Grand Rapids MI Status: Offline Points: 978 |
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Original timing cover or aftermarket replacement? Also, what brand cam/dist gears did they install? Hopefully they did not re-use the cam gear and installed a matched set.
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1975 Cherokee S - Turbo Hemi stick shift autocross/drag race/street 9.97 @ 140.4
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68-73 amx
AMC Addicted Joined: Jun/14/2012 Location: Pa. Status: Offline Points: 533 |
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I would start it like a never run motor,oil change with right oil. Are your sure there's no oiling problem's in the front of the motor?Gear's getting oil, Distributor too far up or down ? Oil pathways to gears clear of obstructions, lined up right? What did shop do? Might want pull front cover off to recheck.
Edited by 68-73 amx - Oct/15/2014 at 7:54pm |
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Airdrie AMX
AMC Nut Joined: Aug/08/2010 Location: Alberta, Canada Status: Offline Points: 329 |
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I would want to know from them the cause of the damage and what they did to correct it. We all know there are bad aftermarket timing covers, bad dist. gears (msd) and timing sets that have the oil slot in the wrong location etc... Hopefully they didn't just throw another gear in there and kick it out the door, if it were me I would find out first what was done before wasting time dropping the motor back in.
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72 amx javelin 401 4spd
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odd401
AMC Apprentice Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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its an original cover,not sure if it is off one of the 360's sitting my garage.has the same casting number as the other one they cracked,top locating pin,i already had an external line to the cam and dist.gears,had them install the one under the intake,when i picked it up the first time he said gears looked fine,not true,he used the gear that came with the dist,and a new msd cam gear,lasted 5 minutes,i schooled him on some of the tricks to get it right,asked to have other tech,the guy that originally built it to work on and was told he wasnt available.they installed msd cam and dist. gear,new oil pump gears and the other oil pump adapter that i ported,and surfaced the face,other one is trashed, almost ready to start it,im gonna turn it over without spark,pull the dist out and check gear patter,wish me luck
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odd401
AMC Apprentice Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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i fired it up,ran for 5 minutes,pulled dist.gears looked fine,wear pattern in the middle of both,runs really rich,reset the floats,test drove 10 miles,every stop almost died,shut it off and it barely started again,smoke out the pipe,oil and gas.no power at all.shop that built it,just towed it to another shop.over 3 grand and havent done a burnout.im at a loss
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69 ambassador 390
Supporter of TheAMCForum Joined: Nov/22/2009 Location: Peoria, AZ Status: Offline Points: 3539 |
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Replace the carb with a brand new one so you know what you have.
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Steve Brown
Algonac, Mi. 69 Ambassador sst 390 84 Grand Wagoneer 69 Cougar XR7 65 Fairlaine 500XL 79 F-350 Super Camper Special |
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odd401
AMC Apprentice Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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i just picked my truck from machine shop,what a waste of three grand,has no power at all,wont even do a burnout.completely drained my bank on this one,i dont understand it,ran pretty strong before this,im about to give up on it
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purple72Gremlin
AMC Addicted Charter Member Joined: Jul/01/2007 Location: Illinois Status: Offline Points: 16591 |
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ghinmi
AMC Addicted Joined: Apr/04/2010 Location: Grand Rapids MI Status: Offline Points: 978 |
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Or borrow one and try it out.
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1975 Cherokee S - Turbo Hemi stick shift autocross/drag race/street 9.97 @ 140.4
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