hlujan

Did a ms4 cam swap with all the goodies... Springs pushrods ect...6000 miles ago... I was on a road trip cruising and noticed a tick and it got louder and louder... Here is what I found... Anyone got an Idea why? Car has never sen a track I don't dog it... It's just a daily driver...

speedtigger

iTrader: (16)

MS4 had a pretty aggressive intake lobe. That is a lot of stress for driver.

sabastian458

iTrader: (5)

Yup, aggressive ramp rate, strong seat pressures, stock rocker needle fulcrum. Upgrade them and rock on

kinglt-1

iTrader: (26)

thats why they make a trunion upgrade for the stock rocker.

hlujan

What do y'all think about the damage to the spring retainer

wildcamaro

iTrader: (15)

Needs replaced...

speedtigger

iTrader: (16)

I think you are pulling that head to replace that valve, get a new valve job on that valve and replacing that retainer and locks.

hlujan

Well I have a 12 hour ride home Thursday... I got it running by putting a new rocker on for now

td1168

iTrader: (2)

That's what I'm saying! You better ask one of these guys on here if the needles are smaller than the openings in the oil pump pick-up screen. I don't recall without having both in front of me. One of those needles go through the oil pump its gonna get ugly.

xxtremes33

+1 for the trunion upgrade.

chevybayboy

iTrader: (6)

Another +1 for upgrade

PREDATOR-Z

That could happen even on stock cams. Do not panic! most likely it will all end up in your crankcase. Get a strong magnet, run it towards the oil plug to try and harness the bearings. Putting the car on an incline towards the plug helps a bit.
Look carefully at spring valley area for ones that could get stuck here and there. Do replace that valve and retainer asap.

vettenuts

iTrader: (4)

Yes, damage to valve stem has penetrated the hardening. Running it with a new rocker could cause more issues as more "fine" metal is dumped into the oil for circulation. I would flat bed the car if it were mine or fix at the cars current location.

speedtigger

iTrader: (16)

Wise advice

RockinWs6

You could disable that cylinder by removing the intake rocker and pushrod, remove the exhaust pushrod and shim the exhaust valve open a small amount Or just let it open and close as is. Then remove the fuel injector plug. Engine will run fine on 7 like this to get you home without any bs............

speedtigger

iTrader: (16)

I would not recommend that. The vibration of a running engine is sure to make the lifter fall out of the tray and crash into the spinning camshaft resulting in a broken lifter and metal fragments through the engine.

wildcamaro

iTrader: (15)

Yea that cylinder 7 idea is a bad one...

RockinWs6

BS the lifters won't jump out geez. Even if they did they can't go anyplace....ever see the inside of a LS engine?

Wait I just thought a little more about this....you actually think the lifters can come out of their bores if no pushrod is on them...hmmm then why doesn't it happen when someone breaks a pushrod.......

Its completely safe to run this way.

PREDATOR-Z

Rockin, whatever you're smoking, I want some

speedtigger

iTrader: (16)

I am not talking about the lifter jumping out of the top of the tray, I am saying that the lifter can fall back down in contact with the camshaft from the up position in the tray. With no pushrod, there is no spring pressure to keep the lifter riding smoothly on the camshaft. So the lifter can smack into the side of the lob instead or riding up the lob. This is when things break.

This even happens to some when the motor is at rest during a camshaft change. This is why most use wood dowels and/or pen magnets to hold the lifters up during the cam change.

As for the broken pushrod thing. It does happen sometimes. Also, most people aren't stupid enough to drive hundreds of miles on a bent or broken valve train.