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Old 09-06-2008, 12:27 AM   #1 (permalink)
EricN
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Loud Ticking from Engine

Just got back from testing the boost controller. Did a WOT run on the eway, short sprint, let off and heard a very loud ticking noise coming from the passenger side. No lose of oil pressure though so I drove it home (live very close) and checked out the noise. I thought it might be an exhaust leak but it appears to be coming from the back passenger side valve cover. The ticking is very noticeable at idle.

I have a comp cam roller setup w/ T&D Rocker shafts.

I just recently had some head work done where I had the heads decked due to me removing an o-ring off the heads.

My question is, what sort of problem(s) am I looking at here? Bent pushrod? Lifter issue?
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Old 09-06-2008, 08:23 AM   #2 (permalink)
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Did you pull a valve cover & look yet?
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Old 09-06-2008, 08:36 AM   #3 (permalink)
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I asked you some required basic questions in your other threads about Lifter preload, Pushrod length and Piston to valve clearance . I guess it's time now to check. Also did you either pull the oil pan or flush out the oil of debris, water, anti-freeze after the blown headgasket? If not you could also have spun a bearing.
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Old 09-06-2008, 10:37 AM   #4 (permalink)
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Quote:
Originally Posted by ULYCYC View Post
I asked you some required basic questions in your other threads about Lifter preload, Pushrod length and Piston to valve clearance . I guess it's time now to check. Also did you either pull the oil pan or flush out the oil of debris, water, anti-freeze after the blown headgasket? If not you could also have spun a bearing.
When I spoke with the mechanics, they said they measured all of that and told me everything was good.

They also changed the oil but I was going to change it this weekend anyways but never got around to it.

I plan on pulling the valve cover today and seeing what could be the problem.
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Old 09-06-2008, 11:24 AM   #5 (permalink)
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Do a leakdown test on each cylinder.
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Old 09-09-2008, 04:14 PM   #6 (permalink)
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Ok tell me if this isn't odd.

I go to start the car today. And the noise is gone completely. I let it get hot at idle and no noise. No oil pressure dropping. Could it had been a stuck lifter?
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Old 09-09-2008, 04:23 PM   #7 (permalink)
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I had that happen with a flat tappet cam once...#5 E lobe was going..wiped out the bottom of the lifter and the lifter stuck in the bore...

Next day, it seemed perfect, and it was not until I tore it down that I found the lifter was hammered (as was the cam)
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Old 09-09-2008, 04:24 PM   #8 (permalink)
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I had that happen with a flat tappet cam once...#5 E lobe was going..wiped out the bottom of the lifter and the lifter stuck in the bore...

Next day, it seemed perfect, and it was not until I tore it down that I found the lifter was hammered (as was the cam)
This is a roller setup though. I still plan on poping the valve cover (local performance shop / friends are looking at it) but I was going to tow it over there (they are 16 miles away) and now I might drive it. Good idea or bad idea?
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Old 09-09-2008, 04:25 PM   #9 (permalink)
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Might want to see if the rollers roll, or has the bearing gone and it is skipping on the cam
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Old 09-09-2008, 04:30 PM   #10 (permalink)
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the exhaust is perfect though and no skipping or funny idle. Would that matter?
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Old 09-09-2008, 04:32 PM   #11 (permalink)
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Probably not before the roller comes apart...but, I am referring to a possibility, not a fact

You took the valve cover off and examined the valve train while the engine was running?
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Old 09-09-2008, 06:07 PM   #12 (permalink)
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I think it might be a lifter issue. I am going to switch to synthetic again to see if that helps. If not, I know it is one of the back to passenger side lifters so I will just replace those 2 and see what happens. First I will do the synthetic switch and see if that helps.

I was able to recreate the noise but it wasn't as loud and it went away immediately. I got into it maybe 8 times and out of the 8 it made the sound once (not as loud) and it went away after a few seconds.
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