TRNW-2: MISCELLANEOUS, 2018 Silverado 5.3 with a misfire

[Tod Chretien]

I definitely want to covert it to traditional camshaft and lifters, 
deleting AFM. I was looking at this package deal but I am not so sure 
about the quality of the parts.

https://www.ebay.com/itm/405209555650?var=675310965679

What do you folks think? That one or maybe this one...

https://www.texas-speed.com/p-18933-l83l86lt1-dod-delete-kit-w-camshaft-for-2014-2018-gm-models.aspx


On 6/8/2025 7:40 AM, Jim Bockus wrote:
> Pretty common for the AFM lifters to fail and ruining the camshaft. If 
> you have to tear down the top end it's best to convert it to 
> traditional camshaft and lifters and disable AFM. Not sure if you can 
> do this legally in California but it's common in Alabama. You do have 
> to remove the heads to access the lifters.
>
> I watched a video the other day about what a PITA it is to remove the 
> oil pump which runs off the front of the crankshaft, the problem is 
> accessing the oil pump pickup bolt, you're supposed to remove the oil 
> pan to get to it but this guy modified a wrench to get to it. Then the 
> next problem is reinstalling the bolt, I guess there's actually 2 bolt 
> holes in the pump but it only uses one, he ground off the spot weld on 
> the flange so he could rotate it and used the bolt hole in the pump 
> that is accessible. I'm sure you can find plenty of information on 
> YouTube.
>
> On Jun 7, 2025 8:52 PM, Tod Chretien via trnw2 <trnw2 at trnw.net> wrote:
>
>
>     *Post ID:* 21395
>     <https://www.trnw.net/trnw/forum_thread.php?post_id=21395&forum=2>
>     *Date:* Sat Jun 7 18:52:40 PDT 2025
>     *Subject:* MISCELLANEOUS, 2018 Silverado 5.3 with a misfire
>     This isn’t a transmission problem so please forgive me for that. I
>     just bought a 2018 Silverado with 110K. It started making a light
>     tapping noise on moderate to heavy acceleration. About 3 days
>     later I had to punch it to beat some oncoming traffic and it
>     started misfiring severely. The #1 cylinder is counting misfires
>     so I pulled the spark plug and they definitely haven’t been
>     replaced yet. Hoping for the best I replaced the spark plug but
>     it’s still counting up on #1. I swapped the coil with #3 but it
>     didn’t change. I hear the lifters on these AFM engines have
>     issues. Does anyone know what goes wrong with the lifters and how
>     to diagnose it? Would it have no compression? Sorry for the dumb
>     question but book time is over 20 hours and I don’t want to do the
>     wrong thing. Any help or insight would be greatly appreciated.
>
>     Tod Chretien
>     Ralph's Transmission
>     Modesto, California USA
>     tod at trnw.net
>
>
>
>     ------------------------------------------------------------------------
>
>
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>
>
-- 
Best Regards,
Tod Chretien
TRNW Inc.
http://www.trnw.net
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