Top end troubleshooting...
03-20-2005, 03:27 PM
#1
Top end troubleshooting... 00 Z28 M6
Engine was ticking, suspected bent pushrods. Suspected right. Took off the valvecovers, popped off the rocker arms, found a couple bent ones and a couple marginally bad ones...replaced those with straight stock ones, made sure all of the pushrods were okay. Put them back in, reattached rockers...tightened to 22 ft/lb, rotated engine 180 degrees & rechecked torque (<-- per ls1howto.com). Put valvecovers etc back on.
Started it up, ran great, ticking gone. Drove easily to gas station, drove great. Took it 5 miles today to take pix, also ran great. On the way back I flashed the throttle to hear the exhaust in the parking deck (4,000rpm or so rev). Ever since then the ticking is back and may even sound worse.
Did I mess something up in the install, or is there more to this problem?? My car only has a couple boltons, nothing internal/major.
Thanks in advance....
Engine was ticking, suspected bent pushrods. Suspected right. Took off the valvecovers, popped off the rocker arms, found a couple bent ones and a couple marginally bad ones...replaced those with straight stock ones, made sure all of the pushrods were okay. Put them back in, reattached rockers...tightened to 22 ft/lb, rotated engine 180 degrees & rechecked torque (<-- per ls1howto.com). Put valvecovers etc back on.
Started it up, ran great, ticking gone. Drove easily to gas station, drove great. Took it 5 miles today to take pix, also ran great. On the way back I flashed the throttle to hear the exhaust in the parking deck (4,000rpm or so rev). Ever since then the ticking is back and may even sound worse.
Did I mess something up in the install, or is there more to this problem?? My car only has a couple boltons, nothing internal/major.
Thanks in advance....
03-20-2005, 03:46 PM
#2
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A rocker bolt may have worked its way loose. It does not take long to pop the valve covers again and check. What caused you to bend pushrods the first time? What all is done to the motor...cam? rockers? springs? hardened pushrods?
03-20-2005, 03:59 PM
#3
Originally Posted by chino_man279
A rocker bolt may have worked its way loose. It does not take long to pop the valve covers again and check. What caused you to bend pushrods the first time? What all is done to the motor...cam? rockers? springs? hardened pushrods?
