[Technotronic]

LT1 engine drain except: camshaft 264HR-12,Rocker Arms:1417-16,Valve Springs:26918-16,Head stock.
rockers flies off the valves.
the photo is not mine , but the situation is similar
what could be

 

[tayto]

maybe post a picture of your setup. perhaps you got non-self aligning rockers in the wrong box.

 

[Jim Paley]

I’m seeing guide plates in that picture. Seems to me I’ve read here before that many guide plates don’t fit quite right and need to be “adjusted”. Sorry, no first hand experience.

 

[buickman1]

Check that rocker vs. the other rockers to see if there is a difference.

 

[BALLSS]

If you are using Guide Plates, use ISKY "adjustable" ones so RR lines up dead nuts to valve tip. You may need to grind some of the fingers down on adjustable ones to move the 2 halves closer together, normal, what they are designed to do

when your 918's break, replace with the Lunati LT1 spring kit

 

[95wagon]

His post said Magnum Roller Self-Aligning Rocker Arms: Chevy; 3/8" Stud, 1.52 Ratio-1
The picture isn't his so nothing seen there is relevant.
We need actual photos

 

[Jim Paley]

The picture isn't his so nothing seen there is relevant.

Ah, yes. I read that and promptly forgot it.

 

[Technotronic]

Sorry, rocket arm 1.6 COMP Cams 1416-12
At the moment I can't take photo but rockers fly off when the engine is running
Push rods stock lt1

 

[95wagon]

Your first post , you said you 1417-16 which is a set of self align for a V8 which would be OK.

Now you say you have 1416-12 which are NON self align . If you have non self align rockers , no wonder they wander off the valve tip!
BTW 1416-12 is only 12 rockers so one can only guess you mean 1416-16 ??

 

[Technotronic]

Your first post , you said you 1417-16 which is a set of self align for a V8 which would be OK.

Now you say you have 1416-12 which are NON self align . If you have non self align rockers , no wonder they wander off the valve tip!
BTW 1416-12 is only 12 rockers so one can only guess you mean 1416-16 ??

Yes,1416-16, If non self align rockers,what to do?

 

[95wagon]

what to do?

Stock iron heads with pressed studs ,

Sell the the rockers and get the right parts

 

[95wagon]

To add , 1.6 rockers + more spring pressure on stock pressed studs not the smartest plan even with a stock cam.
Sure lots get away with it,,,,,,,,, large number of cases , it will pull studs.
Seen it more than twice first hand ,where guys havn't got away with it.

 

[tayto]

i think we're past doing things right here Gerry....

 

[Jim Paley]

To add , 1.6 rockers + more spring pressure on stock pressed studs not the smartest plan even with a stock cam.
Sure lots get away with it,,,,,,,,, large number of cases , it will pull studs.
Seen it more than twice first hand ,where guys havn't got away with it.

For sure. I didn’t realize how little the press in studs could take until recently when I started looking into rebuilding a set of heads. IMO, They are basically ok for a stock rebuild, but aren’t appropriate for any kind of performance.

 

[BALLSS]

OP

unless you are going t have the iron heads machined for screw in studs, you will need to run slf aligning RR. I still believe your will have to much lift with that cam for iron head push rod passage interference.

Stock iron head with stock cam will work fine with 1:6 RR. Crane Gold "narrow body" are the only ones though that clear stock valve cover baffles without trimming.

Back in the day the Crane 227 cam with iron heads and a split 1:5/1:6 RR set up was a common mod. IIRC the 1:5's needed to be on exhaust side

 

[Technotronic]

Thank you all , I will change the rockers

 

[TowFastWithClass]

Thank you all , I will change the rockers

PM sent.