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2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. #5330094 01/23/20 08:08 AM
Joined: Dec 2006
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mrsilv04 Offline OP
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This report is for a 2004 Silverado with a Jasper remanufactured 5.3 engine, with 15,000 miles on it. Oil is being changed in the range of every 1500-2300 miles (3-4 months) using Formula Shell 5w-30 and an AC Delco PF46 filter.

Despite of their several decades of experience in building engines... they claim that they don't understand why there is lead without copper, or why the lead continues to hover. They refuse to do much for me, without any other symptoms. They claim other things can cause high lead results... fuel additives (which I don't use), an engine oil cooler issue (which the truck has the same one that it left the factory with), and on and on.

I spoke with them several months ago regarding this... and at that time, they insisted that I just continue to monitor the situation, and let them know if it continued or got worse.

They've flat out refused to replace the engine under warranty based on this report, that they don't replace engines solely on UOA reports. There have to be other symptoms.

They tell me that my concerns are documented, and not to be worried about the warranty.

Speaking of the warranty... it is expiring in the next couple of months, they seem to simply want to get rid of me.

This is my third Jasper engine in the same truck. The first Jasper engine had a collapsed lifter, and the second Jasper engine had a cracked head.

Wix-1_25500143_5fg0efvj3rxdm145h3ywr055_Page_1.jpg

2004 Silverado - on its 3rd Jasper engine in less than one year.
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330112 01/23/20 08:31 AM
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2004tdigls Offline
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lead is primarily from the connecting rod bearings, my guess is that the bearings are either the wrong size or over torqued causing clearance issues

the only way to tell is to drop the oil pan and remove a bearing for physical inspection to support another warranty claim

https://www.machinerylubrication.com/Read/286/lead-particles-bearing

Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330117 01/23/20 08:46 AM
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bullwinkle Online Confused
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Sounds like Jasper might be a good company to avoid, especially on LS small blocks-and they’re not really all that tough to rebuild!


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330143 01/23/20 09:25 AM
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Miller88 Offline
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With how many of these trucks are out there, have you considered a salvage yard engine from a running but wrecked / rusted truck? I'm a big fan of sticking to engines that were put together by the manufacturer.


18 Forester 2.5I 6M
00 Jeep XJ
01 F-350 4x4 5M
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330208 01/23/20 10:40 AM
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SubieRubyRoo Offline
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OP, just to add another ace to your deck... email Blackstone Labs and ask them to send you info on the universal averages for 5.3s, along with how many samples for 2004s they have processed. As dnewton3 always makes it a point to stress, once you've got a trend on your personal engine, you can then make decent interpretation compared to the universal averages. It's not sexy or sensational, but macro data comparison is what actually tells the story, not an individual UOA. 6 OCI in 10+k miles is not a lot of distance, but if it were a temporary condition, 6 OCI should have washed out what was a bearing streak or something fleeting. This is sustained, and copper is increasing as well.

I'm no UOA scientist like Terry Dyson, but I'd definitely say you have a case if your UOAs are 2-3 times more or greater than universals.


De omnibus dubitandum.
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330246 01/23/20 11:19 AM
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1978elcamino Offline
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Cut out the aviation fuel and nitrous passes and send in another sample.


2018 F150 5.0
2016 Ford Fusion 2.5
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330249 01/23/20 11:22 AM
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mattd Offline
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Jasper builds junk from my experience. Every engine Or transmission I have installed I have replaced under warranty. Every single one. Needless to say I do things myself now.


2007 Ford F-350 4x4 6.0 PSD

ASE Master, L1, L2
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330443 01/23/20 03:48 PM
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Railrust Offline
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I think where they said you are documented and not to worry about it...I probably wouldn’t worry about it. You put 15,000 miles on it without issue...you probably aren’t going to have issues...and if you do, you’re documented.


2018 Chevy Silverado 5.3
2007 Lexus LS460 (deceased)
2008 Honda CRV
(Whatever synthetic oil is on sale or rebate)
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330457 01/23/20 04:06 PM
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Driz Offline
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I’ll keep that place in mind to avoid if I ever need a new mill. That’s how those places often work though. They’ll deny , fabricate and lie lie lie . Anything to squeak it past the warranty. I bet they used cheap 💩 bearings straight from the orient gulag. The cheap outfits are known to maximize profits by doing things like that.
I got a rebuilt bombardier seadoo engine 15 years back from some outfit in Florida. Good reviews seemed to check out and I looked hard. Get one put it in late season used it a bit put it away. Come next spring oil all over the bottom of the hull wouldn’t start. Screwed around then called and they were right on it with “ did you leave the oil in the tank all year”. Sure why not “🤥ohhhhhh well if you read the literature you have to drain the oil tank at seasons end. sorry🤨. My buddy is a Bombadier freak called his contact with them in Montreal. The guy knew exactly what it was , junk cheap crank seals that some rebuilders use to cut costs. Said that draining the oil tank was nonsense.
Sooo🤬I decide to put it on their wonderful forum all . Guess what,I put it on it disappears almost instantly. Come to find out they review everything going on there and just delete criticism. How convenient.......for them.
So lesson learned. Either do it yourself or buy from a place that the pros get their rebuilds from. Yea they cost more but cheap bearings, gaskets and seals (that aren’t expensive to begin with 🤦🏻‍♂️) won’t leave you doing it all again. Kick those cut rate hacks to the curb.

Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330470 01/23/20 04:14 PM
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tundraotto Offline
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Jasper = widely considered junk, kept me away.

Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330483 01/23/20 04:30 PM
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Brons2 Offline
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those LS motors drop a lot of metals and seem to keep on going and going and going. Nevertheless yours does seem higher than averages.

Maybe try Xw40 rather than 30?


2012 Hyundai Sonata GLS 6MT 2.4GDI, ProDS 5w & 10w30 seasonal, XG9688 filter, 2018 Mitsubishi Outlander SEL 2.4 CVT, Dealership Castrol 0w20, Mazda filter.
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330531 01/23/20 05:47 PM
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tblt44 Offline
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Maybe try a synthetic oil next go around or at least a dexos approved oil just to see in it helps.


2003 Avalanche Z71 5.3
2006 Tahoe 5.3
1989 Yamaha moto 4 250
2004 Key Largo w/70 Yamaha 2 stroke
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5330780 01/24/20 03:09 AM
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Gasbuggy Offline
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I remember your other posts. Sucks. For all youll spend on UOAs for this engine, you could buy a good 5.3 from a part out.

Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mattd] #5331520 01/25/20 02:36 AM
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bbhero Online Content
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Originally Posted by mattd
Jasper builds junk from my experience. Every engine Or transmission I have installed I have replaced under warranty. Every single one. Needless to say I do things myself now.



Exactly right ^^^^^


Nissan Altima 3.5 Coupe
Cam2 SuperproMax 5w30 Carquest r84356 Oil filter
"Treat your family like your friends and treat your friends like your family."
Re: 2004 Silverado 5.3, Shell 5w-30, 6 samples, elevated lead concern. [Re: mrsilv04] #5331876 01/25/20 01:22 PM
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RDY4WAR Offline
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I rebuilt a Jasper engine for a guy after Jasper refused to warranty it. Evidently the engine is "sealed" so when he took the valve cover off to take pictures for them of the broken valve spring and dropped valve, they voided his warranty.

I've heard nothing but horror stories about Jasper.

The engine only had ~4k miles on it. The sad part is it drank 2.5 quarts of oil in that 4k miles, and it was easy to see why when I tore it down. The piston to wall clearance was way too wide and the hone was too coarse. While the bores were nice and straight, I had to take the block another .010" over to get a proper PTW clearance.


"He who is without oil, shall throw the first rod." - Compressions 9:1
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