Oil on plugs after rebuild.
01-14-2018, 08:48 AM
#341
Burning Brakes
Thread Starter
01-14-2018, 08:50 AM
#342
Burning Brakes
Thread Starter
Your best bet is to actually see the valvetrain running at idle. Purchase 8 rocker arm clips that contain oil spray from the rocker. Remove one valve cover only, stick a narrow piece of bent cardboard between the valvesprings and the gasket pad. With the clips in place, start it up and look-listen to whats going on. Look for a valve that doesn't open as far as the others. Maybe a rocker stud pulled out, broken spring, bad lifter, bent pushrod, who knows?
And please stay away from that misnamed auto shop. Exhaust bolts loose? Unacceptable.
And please stay away from that misnamed auto shop. Exhaust bolts loose? Unacceptable.
01-16-2018, 07:38 PM
#343
Burning Brakes
Thread Starter
So the noise was resolved today. It was the #2 Exhaust Rocker. It was tightened down about 3/4 of a turn.
Not sure why this one needed that as the lock nut is further down on the stud compared to the other rocker arms.
Since I have screw in studs I wouldn't think it would be pulling out.
But the noise is gone now.
I only drove it back home today so I hope to get more miles on it later this week.
Not sure why this one needed that as the lock nut is further down on the stud compared to the other rocker arms.
Since I have screw in studs I wouldn't think it would be pulling out.
But the noise is gone now.
I only drove it back home today so I hope to get more miles on it later this week.
01-16-2018, 07:45 PM
#344
Team Owner
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St. Jude Donor '22
So the noise was resolved today. It was the #2 Exhaust Rocker. It was tightened down about 3/4 of a turn.
Not sure why this one needed that as the lock nut is further down on the stud compared to the other rocker arms.
Since I have screw in studs I wouldn't think it would be pulling out.
But the noise is gone now.
I only drove it back home today so I hope to get more miles on it later this week.
Not sure why this one needed that as the lock nut is further down on the stud compared to the other rocker arms.
Since I have screw in studs I wouldn't think it would be pulling out.
But the noise is gone now.
I only drove it back home today so I hope to get more miles on it later this week.
lifter.
i hope it is finally resolved and you get miles and miles of
trouble free operation.
good luck
01-16-2018, 08:22 PM
#345
Burning Brakes
Thread Starter
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LenWoodruff (01-16-2018)
01-16-2018, 09:07 PM
#348
Burning Brakes
Thread Starter
I was worried that this went back to the coolant in the oil that I drove it for a few miles.
They checked the bearings and they were ok. But there was no way to check the cam.
Is there anything to check to determine if the lobe is going flat?
01-16-2018, 09:17 PM
#349
Team Owner
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Location: Southern Cal Ca
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St. Jude Donor '22
That bothered me too. Why would just 1 rocker need to be adjusted more than the rest of them?
I was worried that this went back to the coolant in the oil that I drove it for a few miles.
They checked the bearings and they were ok. But there was no way to check the cam.
Is there anything to check to determine if the lobe is going flat?
I was worried that this went back to the coolant in the oil that I drove it for a few miles.
They checked the bearings and they were ok. But there was no way to check the cam.
Is there anything to check to determine if the lobe is going flat?
never seen a backside wipe.
if the lobe wore off, then the lift would be small.
to check, dial indicator to see if it still has the
spec lift.
01-17-2018, 07:22 AM
#351
Drifting
first it did not click..then it did, and the clicking stopped when you tightened it down much farther than the others? more likely a collapsed lifter and you just took up the slack.. now its a SOLID lifter .. next to go is the pushrod
01-17-2018, 07:28 AM
#352
Burning Brakes
Thread Starter
Ugh. These were brand new Crane Lifters to go with the Crane Blueprinter cam that was installed when they built the engine.
01-17-2018, 08:07 AM
#353
Racer
01-17-2018, 03:34 PM
#354
Le Mans Master
I had a similar issue with rockers getting loose on some roller tipped magnum rockers. Turned out to be the pivot ***** were wearing excessively due to higher spring pressures.
Take a look at the pivot ball, you’ll see the wear compared to a new one if this is what’s going on.
Take a look at the pivot ball, you’ll see the wear compared to a new one if this is what’s going on.
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LenWoodruff (01-18-2018)
01-17-2018, 06:30 PM
#355
Race Director
For what it is worth:
I got called to shop due to an engine was clicking and it had several hundred miles on the fresh rebuild.
It was the rocker arms making noise...so I took off the valve covers an using one of my small LED lights I put it down by where the push rod goes into the lifter so i could see it...and with that push rod being loose....the plunger in the lifter was stuck and not coming back up like it should....while the lifters near it worked as designed.
DUB
I got called to shop due to an engine was clicking and it had several hundred miles on the fresh rebuild.
It was the rocker arms making noise...so I took off the valve covers an using one of my small LED lights I put it down by where the push rod goes into the lifter so i could see it...and with that push rod being loose....the plunger in the lifter was stuck and not coming back up like it should....while the lifters near it worked as designed.
DUB
01-17-2018, 06:46 PM
#356
Le Mans Master
Member Since: Aug 2017
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Just to satisfy the curious, I think I would remove the valvecover, loosen the rocker arm on the trouble maker, pull the pushrod and inspect both ends. Try to wiggle the valvespring and like Dub says, shine a light on the lifter.
Then remove the rocker completely, inspect pushrod cup end, check the rocker ball.
Double check that the rocker stud is indeed flush with the head, still. And that the stud threads look all right.
Then remove the rocker completely, inspect pushrod cup end, check the rocker ball.
Double check that the rocker stud is indeed flush with the head, still. And that the stud threads look all right.
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LenWoodruff (01-18-2018)
01-17-2018, 09:26 PM
#358
Race Director
Now, where were we? Lifters and lobes. When a lifter wipes out, it doesn't change the preload, just the amount of lift. Only the lobe gets smaller, not the base circle.
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LenWoodruff (01-18-2018)
01-18-2018, 08:46 AM
#359
Burning Brakes
Thread Starter
For what it is worth:
I got called to shop due to an engine was clicking and it had several hundred miles on the fresh rebuild.
It was the rocker arms making noise...so I took off the valve covers an using one of my small LED lights I put it down by where the push rod goes into the lifter so i could see it...and with that push rod being loose....the plunger in the lifter was stuck and not coming back up like it should....while the lifters near it worked as designed.
DUB
I got called to shop due to an engine was clicking and it had several hundred miles on the fresh rebuild.
It was the rocker arms making noise...so I took off the valve covers an using one of my small LED lights I put it down by where the push rod goes into the lifter so i could see it...and with that push rod being loose....the plunger in the lifter was stuck and not coming back up like it should....while the lifters near it worked as designed.
DUB
01-18-2018, 08:48 AM
#360
Burning Brakes
Thread Starter
Just to satisfy the curious, I think I would remove the valvecover, loosen the rocker arm on the trouble maker, pull the pushrod and inspect both ends. Try to wiggle the valvespring and like Dub says, shine a light on the lifter.
Then remove the rocker completely, inspect pushrod cup end, check the rocker ball.
Double check that the rocker stud is indeed flush with the head, still. And that the stud threads look all right.
Then remove the rocker completely, inspect pushrod cup end, check the rocker ball.
Double check that the rocker stud is indeed flush with the head, still. And that the stud threads look all right.
