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  1. #1

    Angry Need help with engine noise.

    I have a 2000 K2500 (old body style) 7.4L a/t, a/c, long bed extended cab 4x4

    Engine has a ticking noise mostly when cold. I think it is the lifters or maybe the rocker arms. Is there a way to test the lifters? This has 173k miles, so I dont know if I want to put alot of $ in it. Also, I have noticed an antifreeze odor, but have not found a leak. I had the intakes and valve cover gaskets replaced a few years ago. The GM tech who did the work though, really screwed up everything else I had him do. He installed the carrier bearing on backwards and didn't press it on. He beat it on with a hammer. Anyway I would not be surprised if there was a problem there. Any help would be appreciated. Thanks.

  2. #2
    Jr. Mechanic
    Join Date
    Mar 2013
    Location
    adirondacks,n.y.
    Posts
    113

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    start up is tough on most motors,i.e. aged ones,try two oil changes in 500 miles,a cheap diagnosis,nothing like a good cleansing.if it goes away entirely when warm(before oil changes)then lifters are still adjusted properly,look towards real gauge for oil pressure,hopefully it is in range on startup

  3. #3

    Default

    Quote Originally Posted by Indyandy View Post
    I have a 2000 K2500 (old body style) 7.4L a/t, a/c, long bed extended cab 4x4

    Engine has a ticking noise mostly when cold. I think it is the lifters or maybe the rocker arms. Is there a way to test the lifters? This has 173k miles, so I dont know if I want to put alot of $ in it. Also, I have noticed an antifreeze odor, but have not found a leak. I had the intakes and valve cover gaskets replaced a few years ago. The GM tech who did the work though, really screwed up everything else I had him do. He installed the carrier bearing on backwards and didn't press it on. He beat it on with a hammer. Anyway I would not be surprised if there was a problem there. Any help would be appreciated. Thanks.
    173K miles is like half life for one of these ol beasts, it'll have plenty more if you don't have a lead foot, got one running on 358K with no problems. I've had the same problem on one of my trucks after I replaced the camshaft in it. Once I start it up it'll tap for a bit and go away, figured it was just needing the oil cycled to it. So I always waited for it to stop before driving. It cleared up on me after I dropped seafoam in the oil and changed the oil out a few days later. Only way I could say to test the lifters is pulling them out and checking the springs in them. You'd have to removed the intake, valve covers and push rods to do so. Before I cleaned mine out *and installed new lifters and push rods* I had it running with the valve covers off, even after warming up only about 6 of the 16 push rods where squirting oil, and the oil pressure was low. Cleared up with the cleansing and new hard ware.
    94 Chevrolet K1500 4x4. 5.7L 350, 5-speed (AKA Betty) Or Rust Bucket...depends on if I'm mad at her.

  4. #4

    Default

    I put a bottle of rislone in it and it didn't help much. 2 days later I added a bottle of cd2 (the black one) now it seems to be running alot quieter. So I am hoping a good cleaning will help. I have about 1k miles before the next oil change. Thought I might drain out 2 quarts of oil and add 2 quarts of ATF. Then run it for 500 miles or a week to clean it out. Then change out the oil and filter. What do you think?

  5. #5
    Jr. Mechanic
    Join Date
    Mar 2013
    Location
    adirondacks,n.y.
    Posts
    113

    Default

    many old school mechanics,swore by atf cleaning,that was before cats.what about half a qt.and two days easy driving,then change,and change again in a couple more days.probably purchase top quality filter both times,i hate spending big bucks on a filter but when the need arises,oh well

  6. #6
    Jr. Apprentice
    Join Date
    Mar 2013
    Location
    Huntsville, alabama
    Posts
    18

    Default

    I have tried the ATF trick on an old 383 I had a few years ago. It seemed to work great. Seafoam seems to work pretty darn well also.

    A few years ago, an old mechanic friend-of-the-family told me to break new engines in with Rotella 15-40. Since then I haven't used anything else on any oil changes. Rotella has a ton of natural attributes that make it great for breaking in motors and for use in old motors.

    I would follow the above advice and try to clean as much as you can.......and if it doesn't work then start replacing parts. I know that running Rotella seemed to quiet down some of my older jeep motors alot.

  7. #7
    Jr. Mechanic
    Join Date
    Mar 2013
    Location
    adirondacks,n.y.
    Posts
    113

    Default

    383?how few years ago?loved that motor,they should have kept that one to

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