I have a 2000 Astro van with 83,000 miles. The other morning I started the van and the lifters started tapping, I turned it off and let it sit and it did the same thing when I started it again. I changed the oil (Castrol 10-40 and fram extra guard filter) and it seemed as it was less loud although still there. I let it run about 4 minutes and the tapping went away. oil pressure is at 33 and goes up to about 42 when driving. If I'm not mistaken it used to always run at 42 and never went below that. The tapping only happens when it's cold.
What could be wrong?
When It first happened I drove it around the block to pull it in the driveway and the oil pressure went from 40 to almost 80, that's when I changed the oil and it's now at 32 to 40
Any help would be greatly appreciated I'm hoping it's not something internal and I wont to tear it apart.
Also I would like to thank Jim for the advise on my serpentine belt issue, the pulley's were out of alignment.
Gm sent out a TSB on this particular occurrence. It states that lifter noise on the initial cold start-up for about 45 seconds to a minute, then disappears, is normal for non-adjustable hydraulic lifters (which you have).
If this lifter noise doesn't disappear after your warm-up phase, then you have worn components or sticking valves.
Just a heads up here:
Exhaust leaks can sound very similar to ticking lifters and can disappear when the exhaust manifold warms up and expands back onto the head to create a seal again. This is usually related to worn exhaust manifold gaskets and another area you should have a look at to make sure it isn't that, causing the ticking noise.
Gm sent out a TSB on this particular occurrence. It states that lifter noise on the initial cold start-up for about 45 seconds to a minute, then disappears, is normal for non-adjustable hydraulic lifters (which you have).
If this lifter noise doesn't disappear after your warm-up phase, then you have worn components or sticking valves.
Just a heads up here:
Exhaust leaks can sound very similar to ticking lifters and can disappear when the exhaust manifold warms up and expands back onto the head to create a seal again. This is usually related to worn exhaust manifold gaskets and another area you should have a look at to make sure it isn't that, causing the ticking noise.
X2 on checking the exhaust system. I had a similar sound, thought I had a ticking lifter also. Found the conection from the exhaust manifold and the head pipe had a leak. It would leak till it got warmed up then stop. Alot cheaper fix than tearing into a motor!
Gm sent out a TSB on this particular occurrence. It states that lifter noise on the initial cold start-up for about 45 seconds to a minute, then disappears, is normal for non-adjustable hydraulic lifters (which you have).
If this lifter noise doesn't disappear after your warm-up phase, then you have worn components or sticking valves.
Just a heads up here:
Exhaust leaks can sound very similar to ticking lifters and can disappear when the exhaust manifold warms up and expands back onto the head to create a seal again. This is usually related to worn exhaust manifold gaskets and another area you should have a look at to make sure it isn't that, causing the ticking noise.
GM "was" very good at covering their butts. I guess their was enough attention drawn to this Cold Start Lifter Noise, they had to say something. Hopefully the new management will change this way of thinking.
I'd also replace the Fram filter with Purolator, Wix or NAPA. If you search Fram on this site, you'll find a warning from Astro355 (among others) about low oil pressure when using Fram...
Thanks for all the help! It was a sticking lifter. Let the car warm up and took it for a drive on the freeway and low and behold it hasn't tapped since.
Do me a favor and throw that FRAM filter in the deepest hole you can find on this planet! :screaming:
They wreck more engines than careless drivers do.
Please use the AC Delco filter they're the same price but have a much better flow and pressure holding capability.
As stated-don't use the Fram filter.I am a Wix user and am very happy with the results.(former 20yr Fram user)Issues like this can be a long term thing.Keep us updated.
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