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Unobtanium
LSU Fan
Baton Rouge
Member since Nov 2009
869 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Replaced my engine (2008 Silverado, 198k miles) in March 2020. Bad valve wear thanks to miles and bad o-ring on oil pump suction line.

$6700 out the door, but at a local shop, not a dealer.

I would find a good independent shop and get a 2nd opinion.


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10
keakar
Member since Jan 2017
16997 posts

re: Silverado engine losing compression / dealership says it has to be replaced
i literally was at the mechanic shop yesterday and the guy was on the phone quoting a crate engine replacement for a 2006 silverado with 5.3 engine and it was $8k including labor and everything

he said he could get a low mileage running engine from salvage yard for it and that would be $3k including labor and everything

screw the dealership, they are crooks, get a real mechanic to check it out. you may only need to have the heads redone and get it fixed good as new for $1k out the door
This post was edited on 7/22 at 2:00 pm


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100
D500MAG
LSU Fan
Oklahoma
Member since Oct 2010
3069 posts

re: Silverado engine losing compression / dealership says it has to be replaced
quote:

NYCAuburn


just to confirm what you said.



performance ls


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20
kywildcatfanone
Kentucky Fan
Wildcat Country!
Member since Oct 2012
82640 posts

re: Silverado engine losing compression / dealership says it has to be replaced
12K seems like double what it should cost. I would get more estimates.


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20
bigbuckdj
LSU Fan
Member since Sep 2011
1198 posts

re: Silverado engine losing compression / dealership says it has to be replaced
They said it’s losing compression? I know the dealership will usually choose to replace engines vs changing lifters or a cam or something. It may be worth getting a second opinion.


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60
gumbo2176
Member since May 2018
9204 posts

re: Silverado engine losing compression / dealership says it has to be replaced
quote:

Big mistake, far better off taking your engine to a machine shop and having it rebuilt. Takes longer but far better quality


I've done this very same thing twice over the years, once with a 302 and again with a 351, both Ford engines.

I pulled both engines, stripped them of accessories and delivered the long blocks to a machine shop to rebuild.

Once done I put them back together and installed them. Now this was a lifetime ago for many of you posters and a hell of a lot cheaper than quoted for sure. It really helps that I could do the work myself.

While the engines were being reworked, I took the time to clean and paint all the parts I took off the engine and address the engine compartment.


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20
deltaland
Mississippi St. Fan
Member since Mar 2011
63683 posts

re: Silverado engine losing compression / dealership says it has to be replaced
quote:

They say the engine has to be replaced at a cost of 12k and a 1 month wait


That’s insane I just got a new 5.7 hemi put in a 2017 Ram at the dealer for 7,900.

Find you a used engine with under 100k miles for 3k or less and take it to the dealer to install it pay for labor


Rando
USA Fan
When IPs were Visible
Member since Apr 2015
22860 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Buy a engine off ebay.

Buy a hundred ziploc bags and a legal pad.

Label everything and write idiot instructions.

Change it yourself.

19 hours or so if you have no idea wtf you're doing


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10
biohzrd
LSU Fan
Central City
Member since Jan 2010
4706 posts

re: Silverado engine losing compression / dealership says it has to be replaced
If it’s the L83 5.3l you can get a brand new crate engine from Brian Tooley racing for 3,995.00 shipped to your door.

Here ya go.


beebefootballfan
Hawaii Fan
Member since Mar 2011
14406 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Bunch if folks with 2018 Suburbans around my area have lifters going bad. Dealership is quoting 12k out the door for new engines.
This post was edited on 7/22 at 7:10 pm


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20
TD SponsorTD Fan
USA
Member since 2001
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Swazla
LA-Lafayette Fan
Member since Jul 2016
328 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Here is some info from a GM board about late model GM engine problem. Does the description in the first lines describe what you experienced? If so that GM dealer goodwill adjustment.

Ask the dealer to see copy of technician repair notes that they are required to record.

quote:

ENGINE MISFIRE/TICK NOISE, MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED, DTC P0300 SET TECHNICAL SERVICE BULLETIN
Reference Number(s): 15-06-01-002E, Date of Issue: Oct 13, 2016
Affected Model(s): 2015-2017 Cadillac Escalade 2016-2017 Cadillac CTS-V 2014 Chevrolet Silverado 1500 2014-2017 Chevrolet Corvette 2015-2017 Chevrolet Silverado, Suburban, Tahoe 2016-2017 Chevrolet Camaro 2014 GMC Sierra 1500 2015-2017 GMC Sierra, Yukon, Yukon XL Equipped with 5.3L Engine (RPO L83) or 6.2L Engine (RPO L86, LT1, LT4, LV3) Attention: This Bulletin also applies to any of the above models that may be Export from North America vehicles. Supercedes: This Bulletin has been revised to add the 2017 Model Year and replaces PIP5316. Please discard Corporate Bulletin Number 15-06-01-002D and PIP5316.


CONDITION
Some customers may comment on a malfunction indicator lamp (MIL) on and/or an engine misfire/tick noise.

Technicians may find DTC P0300 set or in history.



CAUSE
This may be the result of an active fuel management (AFM) lifter that is mechanically collapsed and/or stuck all of the time.

This may be the result of internal locking pin damage in the lifter, due to oil aeration.

This may be the result of a lifter that has collapsed and is stuck in the lifter bore.



CORRECTION
NOTE:
Inspect the camshaft for damage while the lifters are removed from the engine. If damage is found, replace the camshaft per SI.

If SI diagnosis does not isolate the cause of this concern, technicians should inspect for valve operation.

If the valve(s) are not moving, replace the valve lifter oil manifold and affected bank of AFM lifters. Refer to Valve Lifter Oil Manifold Replacement and Valve Lifter Replacement in SI.

If the lifter has spun the bore, the guides should also be replaced.



RECOMMENDATION/INSTRUCTIONS
There are two approved processes for removing the lifter when stuck in the bore.



Use vice grips with a slide hammer.
NOTE:
Be sure not to pry on the sealing surface of the block.


Use vice grips with a small pry bar.
Typically one of the above approved processes will remove the lifter that is stuck in the bore. If not, the engine will need to be replaced.

With the lifter removed, be sure to inspect the bore for any damage. Typically the lifter bores will look good with no indication of damage.



PARTS INFORMATION


Part Number Description 12660737 MANIFOLD ASM-VLV LFTR OIL (SERV KIT) (L83, L86, or LT1) 12660736 MANIFOLD ASM-VLV LFTR OIL (SERV KIT) (LT4) 12623104 GASKET-VLV LFTR OIL UPR MANIF 12645725 LIFTER ASM-VLV (AFM) (4 per Bank) 12659260 GASKET-CYL HD (6.2L) 12622325 GASKET-CYL HD (5.3L) 11546959 RIGHT SIDE CYLINDER HEAD BOLTS (10) 11611976 LEFT SIDE CYLINDER HEAD BOLT (1) 11546959 LEFT SIDE CYLINDER HEAD BOLTS (9) 12657093 GASKET-EXH MANIF 12626354 GASKET-INT MANIF (8) 12619787 GASKET-VLV RKR ARM CVR 12623308 GASKET-F/PMP BRKT 12618336 PIPE ASM-FUEL FEED INTER 12618337 PIPE ASM-FUEL FEED INTER 12618338 PIPE ASM-FUEL FEED 12668553 SEAL KIT-F/INJR (O RING) (2)


WARRANTY INFORMATION
For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.



Labor Operation Description Labor Time 4080978* Valve Lifter Oil Manifold and Valve Lifter Left Side Replacement 9.4 hrs (Silverado, Sierra) 14.8 hrs (CTS-V) 9.2 hrs (Escalade, Suburban, Tahoe, Yukon) 11.7 hrs (Corvette) 7.0 hrs (Camaro) 4080988* Valve Lifter Oil Manifold and Valve Lifter Right Side Replacement 10.9 hrs (Silverado, Sierra) 15.5 hrs (CTS-V) 9.3 hrs (Escalade, Suburban, Tahoe, Yukon) 11.4 hrs (Corvette) 9.0 hrs (Camaro) *This is a unique Labor Operation for Bulletin use only.


bigbuckdj
LSU Fan
Member since Sep 2011
1198 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Man, I can’t believe they are still having the afm lifter problem.


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10
slacker130
Auburn Fan
Your mom
Member since Jul 2010
5145 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Did they diagnose the problem with the motor? That's the first step.

I had a dealership tell me $9k for a motor replacement. #4 cylinder had terrible compression, this after they charged me $600 to pull the intake. I took it home, pressurized the cylinder, it was leaking thru the exhaust. Bought a camera, looked thru the spark plug hole, exhaust valve was chipped. Found a local shop to do a valve job for $2k.


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20
Bullfrog
LSU Fan
but I left before halftime.
Member since Jul 2010
49703 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Change your rear main seal while the engine is out.

I made the mistake and did not.


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20
subMOA
LSU Fan
Komatipoort
Member since Jan 2010
1417 posts

re: Silverado engine losing compression / dealership says it has to be replaced
quote:

12k on an LS? I hope its pushing 600hp +


Boy, you ain’t lying on that one!

OP- if you have any mechanical ability whatsoever, you can pull this engine.

Go to eBay- buy one out of a wreck. Pull your and install new used one.

Seriously- this is a day job tops.


subMOA
LSU Fan
Komatipoort
Member since Jan 2010
1417 posts

re: Silverado engine losing compression / dealership says it has to be replaced






Anyhow- Imgur is acting weird- use your imagination- it’s a timeslip from last week-

10.9 at 122 mph.

Since we’re on LS motors- this is a 300k take out, put into an 88 Ranger, Microsquirt, and a turbo at 13 pounds.

Total investment for the whole shebang is less than $5000 and it gets daily’ed to an office job every damn day.
This post was edited on 7/23 at 3:45 pm


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20
DMAN1968
Member since Apr 2019
4705 posts
 Online 

re: Silverado engine losing compression / dealership says it has to be replaced
quote:

Find you a used engine with under 100k miles for 3k or less and take it to the dealer to install it pay for labor

Agree with the first part...not the dealer part.


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10
GREENHEAD22
LSU Fan
Member since Nov 2009
15862 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Would getting a tune and deleting the AFM system help avoid this?


GREENHEAD22
LSU Fan
Member since Nov 2009
15862 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Bump to see if I can get a answer to my above post. My 16 GMC is closing in on 100K and I am getting nervous.


biohzrd
LSU Fan
Central City
Member since Jan 2010
4706 posts

re: Silverado engine losing compression / dealership says it has to be replaced
Of you keep it in tow/haul mode it will deactivate the DOD/AFM functions.


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