Is lifter tick normal on a 4.9?
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HT4100 4.1, 4.5, 4.9 Discussion, Is lifter tick normal on a 4.9? in Cadillac Engine Discussion; So I've noticed on cold start ups, I have a lot of lifter noise, especially from the passenger side. When ...
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    I~LUV~Caddys8792's Avatar
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    Is lifter tick normal on a 4.9?

    So I've noticed on cold start ups, I have a lot of lifter noise, especially from the passenger side. When it's warmed up, I still can hear a bit of noise, but not nearly as much. Is lifter noise normal on a 4.9? I know some of the GM motors have it (3.1, 3.4) but I'm not sure if the 4.9 has it, I've never really given it too much thought before my dad asked about it this morning. He told me my car had gotten awful noisy on cold start ups lately, so then I started it this morning and walked around it and that's where I noticed how bad it was.


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    illumina's Avatar
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    Re: Is lifter tick normal on a 4.9?

    Roller lifters on some higher mileage 4.9's seems to get that little tick. My Seville had it since 117,xxx miles and still running (save for the tranny).

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    I~LUV~Caddys8792's Avatar
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    Re: Is lifter tick normal on a 4.9?

    I wouldn't say it's so little, it's quite loud for lifters, I'll have to videotape it sometime. Maybe it's because I've been running that 15W-40 Rotella in it for the last ~36,000 miles?

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    Re: Is lifter tick normal on a 4.9?

    I would think the Rotella would quiet things down rather than cause noises.

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    Re: Is lifter tick normal on a 4.9?

    All that thick oil trying to get squeezed through those lifters??

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    Re: Is lifter tick normal on a 4.9?

    You may have to pull them and clean them it. It common on the 3.1 and 3.4 once cleaned up they quiet up.

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    rstewart65 is offline Cadillac Owners Member
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    Re: Is lifter tick normal on a 4.9?

    A quart of Marvel Mystery Oil has cured the tapping in a few 4.3L Chevys with roller lifters in the past, may work in the Caddy.

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    behind-bars is offline Cadillac Owners Connoisseur
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    Re: Is lifter tick normal on a 4.9?

    Or maybe seafoam in the crankcase before the next oil change to help clean them up and stop them from sticking. I have noticed a knock from mine lately, not sure if its lifters or what, shouldnt be spark knock though

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    Re: Is lifter tick normal on a 4.9?

    Video I took this morning showing the tick at cold start ups.

    http://s83.photobucket.com/albums/j3...t=6ae93627.flv

    It's due for an oil change before I take it up to North Dakota this weekend. I'll either tackle that tomorrow night or perhaps Thursday night. I think I'll run a can of that Marvel Mystery Oil thru too.

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    behind-bars is offline Cadillac Owners Connoisseur
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    Re: Is lifter tick normal on a 4.9?

    Quote Originally Posted by I~LUV~Caddys8792 View Post
    Video I took this morning showing the tick at cold start ups.

    http://s83.photobucket.com/albums/j3...t=6ae93627.flv

    It's due for an oil change before I take it up to North Dakota this weekend. I'll either tackle that tomorrow night or perhaps Thursday night. I think I'll run a can of that Marvel Mystery Oil thru too.

    Hmm.. Sounds just like mine, never knew any different lol. Mine is only 98k miles. Let us know if you do anything to clean it up.

    Good luck

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