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Broke Rocker Arm Rod ?????? 70 RR 383 #871976 12/05/10 02:47 PM 12/05/10 02:47 PM
Joined: Jan 2005 Posts: 1,222 okla. O okie OP pro stock
okie OP pro stock O Joined: Jan 2005 Posts: 1,222 okla.	We was going to do a parade and my 383 started rattling, took it home and the rod that holds the rockers on had broke in 2 places. What could this have messed up in my motor? The rockers weren't working on 2 cylinders. Might be my Merry Christmas, I sure hope not. Thanks for any ideals. It is newly rebuilt with Keith Black pistons and stock heads and a resto MP performance cam. Ronnie

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: okie] #871977 12/05/10 03:17 PM 12/05/10 03:17 PM
Joined: Jun 2004 Posts: 3,319 Chicago Burbs sthemi master
sthemi master Joined: Jun 2004 Posts: 3,319 Chicago Burbs	I had that happen a long time ago to a 383, the bolts for the shaft had worked loose, (leftover glassbeads in the bolt hole from cleaning) caused a incorrect torque reading. Anyway, Loss of oil pressure was the first clue something was wrong, Thre were no parts or pieces to get into the motor. No damage to my motor. Bottom line #1 concern is loss of oil pressure.. Video Little Red Wagon Indy Nats,BurnoutContest

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: sthemi] #871978 12/05/10 03:25 PM 12/05/10 03:25 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Note: Even with a loss of oil pressure to the top and the gauge, you will still have plenty of oil to the bottom end. The oil is spreading out as it reaches the top with no restriction but the bottom will still have oil feeding.

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: MoparforLife] #871979 12/05/10 03:30 PM 12/05/10 03:30 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	Unless a lifter pops out then al the oil pressure dumps right out, BTDT They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: Supercuda] #871980 12/05/10 05:43 PM 12/05/10 05:43 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Still be oil that far. The Rod and main bearings will still get oil.

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: MoparforLife] #871981 12/05/10 06:20 PM 12/05/10 06:20 PM
Joined: Jan 2005 Posts: 1,222 okla. O okie OP pro stock
okie OP pro stock O Joined: Jan 2005 Posts: 1,222 okla.	So you don't think it should have hurt my pistons are rings? I didn't know what it would have done on the 2 cylinders the rockers wasn't working on. It never lost oil pressure and I didn't drive it that far. I torgued all the bolts to the specs but 1 of them came loose and 1 broke in the head but I got it out so I'm waiting for the new parts to get here Tues. So maybe it won't be nothing bad. Ronnie

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: Supercuda] #871982 12/05/10 10:54 PM 12/05/10 10:54 PM
Joined: Jun 2004 Posts: 3,319 Chicago Burbs sthemi master
sthemi master Joined: Jun 2004 Posts: 3,319 Chicago Burbs	Quote: Unless a lifter pops out then al the oil pressure dumps right out, BTDT When the shaft breaks, it is like opening a giant drain on oil pressure, the pump doesnt make enough flow to maintain pressure..same as when a liter pops out. There should be no valve damage, unless a stuck valve caused the damage, not a loose bolt.. Ususlly the pushrod will bend before the shaft breaks.. Video Little Red Wagon Indy Nats,BurnoutContest

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: sthemi] #871983 12/06/10 08:19 AM 12/06/10 08:19 AM
Joined: Jan 2005 Posts: 1,222 okla. O okie OP pro stock
okie OP pro stock O Joined: Jan 2005 Posts: 1,222 okla.	It didn't bend a pushrod and it didn't lose all the oil pressure so maybe it will be all rite. Would you use lock tite on the bolts when I put it back together? It had a ticking in it for a while so I guess the 1 bolt had been working loose for a while. I'll find out tomorrow when i get my parts. Ronnie

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: okie] #871984 12/06/10 11:12 AM 12/06/10 11:12 AM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	When the shaft breaks, you won't lose all your pressure because of the very limited pulses the shafts get through cam rotation. I've found some of the 3/8 threads for rocker shafts are screwed up upon removal, so it is a good idea to run a tap through each one while shaft is off making sure to clean as much out of there that you can. I wouldn't loctite, just crank them down to 25-30 foot lbs.

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: buildanother] #871985 12/06/10 02:19 PM 12/06/10 02:19 PM
Joined: Jan 2005 Posts: 1,222 okla. O okie OP pro stock
okie OP pro stock O Joined: Jan 2005 Posts: 1,222 okla.	What would have made the bolt to back out? I had them all torqued. You don't think it would be safer to use the blue lock tite on it? Ronnie

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: okie] #871986 12/06/10 05:46 PM 12/06/10 05:46 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	If the bolts had good threads and threads in cyl head were good and bolts were cranked-torqued down, they should have clamped well. You CAN loctite them, but make sure the threads are allowing bolts to clamp down adequately. Easy on that loctite, especially at the pedestals that are providing the oil to the shafts.

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: okie] #871987 12/06/10 08:46 PM 12/06/10 08:46 PM
Joined: May 2004 Posts: 679 N.E Indiana R repad super street
repad super street R Joined: May 2004 Posts: 679 N.E Indiana	Quote: So you don't think it should have hurt my pistons are rings? I didn't know what it would have done on the 2 cylinders the rockers wasn't working on. It never lost oil pressure and I didn't drive it that far. I torgued all the bolts to the specs but 1 of them came loose and 1 broke in the head but I got it out so I'm waiting for the new parts to get here Tues. So maybe it won't be nothing bad. Ronnie Check that you used the corect length rocker shaft bolts, possibly the bolt that you broke was bottoming out in the hole. If the shaft was not held down properly, it may have allowed it to flex and crack.

Re: Broke Rocker Arm Rod ?????? 70 RR 383 [Re: repad] #871988 12/06/10 08:50 PM 12/06/10 08:50 PM
Joined: Jan 2005 Posts: 1,222 okla. O okie OP pro stock
okie OP pro stock O Joined: Jan 2005 Posts: 1,222 okla.	They were the bolts that was in the motor when I tore it down. I did go buy new grade 8 bolts to put back in it, just waiting to get my parts in the morning. I just hope everything is all rite. Ronnie

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