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06-13-2008, 09:35 PM
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#1
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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Roller rockers failing.
Apparently God hates me, and my roller rockers.
I noticed today while I was cleaning my engine that the tips (not the fulcrum) of my roller rockers are failing, after only 15K miles! Gay.
This is why I'm an agnostic Sean, it seems to me that God must have seen that I've already spent over a grand in car parts over the last few weeks and he decided "Hey, let's watch him squirm!" 
I guess on the plus side I can buy some 1.65 rockers now and up the valve lift. Should be good for another 20? hp. |
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06-14-2008, 12:37 AM
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#2
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by enkeivette
Apparently God hates me, and my roller rockers.
I noticed today while I was cleaning my engine that the tips (not the fulcrum) of my roller rockers are failing, after only 15K miles! Gay.
This is why I'm an agnostic Sean, it seems to me that God must have seen that I've already spent over a grand in car parts over the last few weeks and he decided "Hey, let's watch him squirm!"
I guess on the plus side I can buy some 1.65 rockers now and up the valve lift. Should be good for another 20? hp. |
Kinda sounds like an oiling or geometry problem. Are you just firing the thing up and nailing it? You should treat it like a lady and you may not have such problems. 
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06-14-2008, 01:34 AM
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#3
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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Not a geometry problem, the rocker pushrod geometry is perfect (because I set it up myself  ). Not an oiling problem, all of the pushrod holes were clean. The problem is the no-name rockers, if you look in my garage under engine specs you'll see that my rockers are the only no-name part on the engine. Bought them cheap from an E-Bay company. Looks like it cost me money in the long run. |
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06-14-2008, 06:36 AM
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#4
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by enkeivette
Not a geometry problem, the rocker pushrod geometry is perfect (because I set it up myself ). Not an oiling problem, all of the pushrod holes were clean. The problem is the no-name rockers, if you look in my garage under engine specs you'll see that my rockers are the only no-name part on the engine. Bought them cheap from an E-Bay company. Looks like it cost me money in the long run. |
Cheap stuff usually is more expensive. . .
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06-14-2008, 07:50 AM
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#5
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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I think my dual valve springs might be to blame for the excessive wear on the roller tips.
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06-14-2008, 11:41 AM
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#6
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Neanderthal
Join Date: Mar 2008
Posts: 5,320
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Quote:
Originally Posted by enkeivette
I think my dual valve springs might be to blame for the excessive wear on the roller tips.
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What kind of damage to the roller tip?
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64 Vette Roadster 400 ci
1990 F150 351 ci SuperCharged
48 Harley Pan Head 76 ci
2016 Nissan Altma
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06-14-2008, 03:46 PM
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#7
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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The roller itself is fine, the damage is internal. Some of the rollers feel rough as in they don't spin freely. Feels like the bearings or whatever's in there has flat spots.
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06-16-2008, 08:12 AM
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#8
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Neanderthal
Join Date: Mar 2008
Posts: 5,320
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Quote:
Originally Posted by enkeivette
The roller itself is fine, the damage is internal. Some of the rollers feel rough as in they don't spin freely. Feels like the bearings or whatever's in there has flat spots.
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Ok, now I understand. Well, at least the best "I" can. 
__________________
64 Vette Roadster 400 ci
1990 F150 351 ci SuperCharged
48 Harley Pan Head 76 ci
2016 Nissan Altma
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06-16-2008, 11:32 AM
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#9
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Super Moderator
Join Date: Dec 2007
Posts: 6,850
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No it was my bad, I said damage to the roller tips, didn't specify.
Don't remember deleting that post above, what I said was... I figured out that with 1.65 rockers my lift would go from .520/ .540 to .576/ .594.  |
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06-16-2008, 01:19 PM
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#10
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Neanderthal
Join Date: Mar 2008
Posts: 5,320
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Quote:
Originally Posted by enkeivette
No it was my bad, I said damage to the roller tips, didn't specify.
Don't remember deleting that post above, what I said was... I figured out that with 1.65 rockers my lift would go from .520/ .540 to .576/ .594. |
Make sure you check push rod clearence at the head and rocker clearence at the spring. 
__________________
64 Vette Roadster 400 ci
1990 F150 351 ci SuperCharged
48 Harley Pan Head 76 ci
2016 Nissan Altma
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