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Engine Tap At Startup

ZMAN

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EDZ Z71 Enthusiast

EDZ Z71

Posted
Posted

Sometimes after setting all night and starting my truck it sounds like the lifters or something tapping for the first 10-20 seconds. It is very annoying to me. Is this normal. I just changed oil 1500 miles ago and always use Mobil 1 5w30 with a new filter. Also last night while driving to work the oil change light came on. I reset it just after the last oil change. I just checked the oil level and it is in the acceptable range (toward the top of upper limit). Whats up here? Any ideas?  Thanks ahead of time.

(Edited by EDZ Z71 at 8:49 am on Sep. 6, 2001)

chevy4x4trucks Senior Enthusiast

chevy4x4trucks

Posted
Posted

The oil change light which is supposed to tell you when to change your oil based upon your driving conditions isn't the greatest in my opinion.  When you change your oil you are supposed to reset it by putting the key in the ignitioning, turning it to the second position (just before where you would start the truck) and then pump the gas pedal three times.  As for the knock, my truck seems to make that all the time, I even noticed it this summer driving down the freeway with the construction there were those cement barriers two feet away from the truck so I could hear the sound reflecting off of it.  It made a fast tick whenever I hit the gas.

Smitty00Z71 Enthusiast

Smitty00Z71

Posted
Posted

The slight ticking/knocking sound in the morning is normal, mine does it for about 3 seconds. Anything worse may need to be looked at. AS for the oil light, it sounds like you didn't reset it right as noted above. If you did , do it again and see if it helps

ZMAN Enthusiast

ZMAN

Posted
  • Author
Posted

What brand of oil filter did you use? I have the same problem with my 5.3. I have read that using an oil filter besides genuine AC will cause this problem to start, going to change mine back to AC for S&G's

Shaners Senior Enthusiast

Shaners

Posted
Posted

Zman is right about the filter.  The AC filter has a valve in it to help prevent draining back into the pan and to give oil to the motor quicker on start-up.  I sent my wifes van to the dealer for its' complimentary oil/filter change with almost 3000 miles on the odometer but the change oil light was not on yet.  I figured the tech person would've reset it, about 400 miles later the light came on.

The change oil light doesn't actually check the oil but rather it uses a set of algorithms using engine rpm's/mph/run time hours etc. to determine when the oil should be changed.

Shaners Senior Enthusiast

Shaners

Posted
Posted
Quote: from chevy4x4trucks on 3:39 pm on Sep. 6, 2001

So what type of oil filters can you use?  I've been using fram w/o a problem

I've been using OEM filters for years mainly for warranty issues.  I also have my oil changes done at the dealer so it is all documented.  Besides the dealer guarantees 30 minutes or less and only ?.95.  I personally can't run to Walmart and buy my supplies and then get home and change my clothes and do the work and then get rid of the used oil any faster or much cheaper.  I just check the level on the stick and look for leaks for a couple of days and don't worry about it...

To answer your question I don't know what other brands of filters have the "anti-drain back valve" in them...

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