j-mart32

iTrader: (4)

Got everything off. It all looks pretty good. The lifters come in and out nice and smooth, and the wheels on them are like new.

Is it possible the pushrod jumped the lifter when the rocket blew off? I put the pushrod back in and I was able to angle it back into the buried position past the lifter.

Also when I took the rockers off, 3 of the bolts were barely hand tight. Thinking the broken ones must of been loose and caused all this ?

Added a few pics as well

01CamaroSSTx

iTrader: (3)

So improperly torqued bolts led to the rocker finally breaking off. That really sucks but on the brighter side it could have been a whole lot worse.

Ls7colorado

iTrader: (3)

Bingo

And yes the pushrod got thrown off the lifter when this happened, especially with those being link bar lifters.

vettenuts

iTrader: (4)

Measure those bolts that were loose with a new one or one that was tight. You still must check coil bind. That will break the bolts and the rockers along with other damage. Don't jump to conclusions, loose bolts may be a result, not a cause.

KCS

iTrader: (20)

If the shop that built this couldn’t make sure the rocker stand bolts were tight, I’d want to to go back through the whole engine and make sure nothing else is wrong. Glad you are starting to get it figured out.

j-mart32

iTrader: (4)

Yea that definitely doesn’t give me any warm and fuzzy feelings I’ll say that for sure. But I just dropped the head to a shop near by (different shop) to go through it and see that valves are ok etc before I bolt it back on with a few new rockers and pushrods

Anyone in the CT area that wants to do some volunteer work to check the valvetrain / adjust it with me 😂

wannafbody

iTrader: (2)

Could an incorrectly sized pushrod cause this?

j-mart32

iTrader: (4)

I dropped the head off at an engine shop first thing Saturday morning. He said he’s seen this before and it’s from incorrect torque. They backed out or were overtightened causing the shafts to break. The pushrod may have jumped the lifter cup when all hell broke loose and the rockers were flopping around lol.

Im starting the block prep to get it back together if the engine shop says the head is good to go, hoping to get it back Wednesday. I’m going to re do all the rockers on the driver side too just to be safe.

Im gunna find TDC on #1 using the piston stopper method. When I find TDC, if it’s not on the compression stroke, 1 full 360* turn of the crank should put me to TDC on the compression stroke. My line of thinking correct here?

pdxmotorhead

Did you re-check the bottom end torque ? Rods and Mains? If they couldn't get one side right... Ya never know..

j-mart32

iTrader: (4)

Have not checked anything there yet. Oil pan is still on the car

s30.hybrid

iTrader: (3)

I’d say you’re pretty lucky if the damage is isolated to a couple of rockers. I would pull the engine and go through everything myself (disassemble, CLEAN, measure clearances and retorque) or find a reputable shop that knows these engines who will. You have a lot of nice hardware there. It not worth risking finding anymore of someone else’s mistakes.

j-mart32

iTrader: (4)

Got the head back from the shop. Went through it and saw no damage. Thinks it was just a straight up hard parts failure on the shafts of the rockers.

thinking of upgrading pushrods from 5/16 to 11/32. Has any one fit these on afr heads before without modification?

69gto96z

iTrader: (13)

My mamo heads used 11/32 pushrods. They are AFR cast. I would think 11/32 would drop right in.

j-mart32

iTrader: (4)

Thats what I like to hear. Would get a set of Manton 11/32 .120 wall push rods

j-mart32

iTrader: (4)

Anyone know by chance the preload of morel 5850 short travel lifters?

Called morel and had to leave a message with tech department

G Atsma

Maybe call Summit Tech line, or WS6store. They might be able to help.

01CamaroSSTx

iTrader: (3)

Lunati High RPM 72532's like .020-.030 which are Morel's and I'm thinking .010-.015 for the 5850's

j-mart32

iTrader: (4)

Lunati and morel are one in the same right? My build sheet says morel 5850, but when I took them out to inspect, the link bar actually said lunati on it. Wtf lol

Since it literally says lunati on it, I’ll give it .020 I guess?

Summitracing

11/32 .120 wall Summit HDR pushrods available in .025 increments are a good idea, but more importantly the other shafts are likely fractured and about to break. It would be prudent to replace all 16 shafts at once.

j-mart32

iTrader: (4)

Ordered a set of Manton pushrods in 11/32 .120
wall. Ordered everything else I needed from you guys though. Your overnight shipping gets to me by 1030 am if I order by 7PM. It’s absolutely awesome!