Need help diagnosing ticking (Video)
Need help diagnosing ticking (Video) Alright, where to start. Car has had a slight tick when under load (2k+rpms) for about 4k miles. I assumed it was lifter tick and was going to wait until I picked up a set of heads before I replaced the lifters. The valvetrain was quite at idle...up until yesterday 
When driving to work, I noticed the oil pressure start to fall down to around 16-20psi from the normal 35-40psi idle. I immediately parked the car and did not start it back up for a few hours. Upon leaving work, the service engine light came on and the car started to sputter and run like **** for about 60 seconds before I parked it. At this time, the "lifter tick" was very very noticeable at idle and under any type of load...oil pressure seemed okay though.
Bent valve, pushrod, collapsed lifter? Is that basically all that could be contributing to the valvetrain noise besides maybe a broken spring or rocker? Could one of these be the source of the low oil pressure? I was told that if it was a spun bearing, the ticking noise would not increase with RPM but stay somewhat consistent while the RPMs were increased...is this true? I know there is no way to really tell what is damaged until you tear into the valvetrain, however, could a lifter or something else caused more damage to the pistons or something else?
Car has 67k miles on it.
Thunder Racing 230/224 .575
918 Springs on factory 241's
Thanks in advance for any help or advice!
http://s296.photobucket.com/albums/m...t=M4H01468.flv
When driving to work, I noticed the oil pressure start to fall down to around 16-20psi from the normal 35-40psi idle. I immediately parked the car and did not start it back up for a few hours. Upon leaving work, the service engine light came on and the car started to sputter and run like **** for about 60 seconds before I parked it. At this time, the "lifter tick" was very very noticeable at idle and under any type of load...oil pressure seemed okay though. Bent valve, pushrod, collapsed lifter? Is that basically all that could be contributing to the valvetrain noise besides maybe a broken spring or rocker? Could one of these be the source of the low oil pressure? I was told that if it was a spun bearing, the ticking noise would not increase with RPM but stay somewhat consistent while the RPMs were increased...is this true? I know there is no way to really tell what is damaged until you tear into the valvetrain, however, could a lifter or something else caused more damage to the pistons or something else?
Car has 67k miles on it.
Thunder Racing 230/224 .575
918 Springs on factory 241's
Thanks in advance for any help or advice!
http://s296.photobucket.com/albums/m...t=M4H01468.flv
doesent sound like a bearing, you wont know until you take the valvetrain apart and change oil tho. im currently going through the same thing only thing is all my stuff is new. hope fully for you its something easy like a pushrod or a rocker or something. gl
Pushrods all seemed to be okay, as well as the rockers. Still pulling the heads off but I'm hoping its a bad lifter and maybe only the valves are bent.
Finally got the passenger side head off. Pulled the lifters and they appeared to be okay as well, however I'm not exactly sure what to look for when looking for a bad one. Going to have the heads looked at tomorrow to see if a valve is bent. So basically wound up spending part of the day pulling the passenger head to find out nothing at this point as to what is wrong with the car.....
It doesn't sound promising. Hopefully it's not a bearing. And, yes, a spun bearing would increase with RPM's. Mine did. Mine sounded about like yours for a while. I changed the oil and inspected the valvetrain, and found nothing. Then, the noise quickly changed to this.
http://www.youtube.com/watch?v=uBlUSUXUaVw
#6 rod bearing was paper thin, when the motor got torn apart last week. Luckily, I didn't trash the crank though.
http://www.youtube.com/watch?v=uBlUSUXUaVw
#6 rod bearing was paper thin, when the motor got torn apart last week. Luckily, I didn't trash the crank though.
It doesn't sound promising. Hopefully it's not a bearing. And, yes, a spun bearing would increase with RPM's. Mine did. Mine sounded about like yours for a while. I changed the oil and inspected the valvetrain, and found nothing. Then, the noise quickly changed to this.
#6 rod bearing was paper thin, when the motor got torn apart last week. Luckily, I didn't trash the crank though.
#6 rod bearing was paper thin, when the motor got torn apart last week. Luckily, I didn't trash the crank though.
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It doesn't sound promising. Hopefully it's not a bearing. And, yes, a spun bearing would increase with RPM's. Mine did. Mine sounded about like yours for a while. I changed the oil and inspected the valvetrain, and found nothing. Then, the noise quickly changed to this.
http://www.youtube.com/watch?v=uBlUSUXUaVw
#6 rod bearing was paper thin, when the motor got torn apart last week. Luckily, I didn't trash the crank though.
http://www.youtube.com/watch?v=uBlUSUXUaVw
#6 rod bearing was paper thin, when the motor got torn apart last week. Luckily, I didn't trash the crank though.
That doesn't sound that expensive
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Verdad Gallardo Not my motor anymore. Fairly sure that it's just getting honed and everything cleaned up, then new bearings, and that's it though. I decided to just go ahead and buy a 6.0 and have some fun with it, instead of messing with machine work and all with the LS1.
