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76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi #4719410
04/07/18 10:48 AM
04/07/18 10:48 AM
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
FlyNavyP3 Offline OP
FlyNavyP3  Offline OP
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
First analysis on the 350 in my 1976 K-10 Chevy truck. The 350 is not original to the truck but is a 1976 350 from some sort of GM Car with an automatic according to the block stamping. I've owned the truck for a little over three years. Had exceptionally low oil pressure when I purchased it and unknown oil from a Valvoline instant oil change judging by the filter I removed when this oil was installed. Immediately prior to this oil change I had the oil pan off to inspect rod and main bearings (all checked out ok) and I installed a Melling M-99HVS oil pump (for those not familiar this is a BBC pump made to fit a SBC that was used in Z-28 engines) in addition to the new oil pump a 28,000 GVW oil cooler was installed and plumbed with -10 AN line with a thermostatically controlled Permacool sandwich adapter. Oil pressure with the new oil pump is now excellent for an old SBC. Oil fill was 4 quarts of Mobil Delvac 1300 15w40 CJ-4 and 2 quarts of Napa All Fleet 15w40 CI-4+, top off oil was .5-.75 quart of Valvoline SAE 30 I had laying around and open. Silicon in the UOA is probably a combination of sealant used on the 4 corners of the oil pan gasket and the new silicon rubber Fel-Pro one piece oil pan gasket and to a lesser extent from silicon sealant used on the valve cover gaskets that were replaced immediately prior to my ownership. High copper is likely due to the new 28,000 GVW copper oil cooler. Filter for this oil change was an AC Delco PF-1218 posted in the filter section. New oil in was 6 Quarts of Napa All Fleet 15w40 CI-4+ and a new Delco filter.

Enjoy!



Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: 76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi [Re: FlyNavyP3] #4719519
04/07/18 12:51 PM
04/07/18 12:51 PM
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
FlyNavyP3 Offline OP
FlyNavyP3  Offline OP
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
I forgot to mention... the blackstone comments about fuel were in response to what I wrote on the slip. The Truck has a 4bbl carb with an electric choke and frequently gets started up, backed out of the garage and shut off, then fired up and pulled back in without ever warming up, at all. I fully expected to see a huge dip in flash point and viscosity from all the partial warmups on this engine over the 2.5 years the oil was in service. Granted [censored] fuel is usually under estimated but the solid flash point indicates no huge trouble on the horizon. Oil cooler thermostat starts to open at 165 and is full open at 180F.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: 76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi [Re: FlyNavyP3] #4719575
04/07/18 01:35 PM
04/07/18 01:35 PM
Joined: Apr 2008
Posts: 38,271
Ontario, Canada
OVERKILL Online content
OVERKILL  Online Content
Joined: Apr 2008
Posts: 38,271
Ontario, Canada
This is enough to give the PPM fanatics chest pains LOL


2018 RAM 1500 Big Horn EcoDiesel
2016 Grand Cherokee SRT
Re: 76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi [Re: OVERKILL] #4719591
04/07/18 02:00 PM
04/07/18 02:00 PM
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
FlyNavyP3 Offline OP
FlyNavyP3  Offline OP
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
Originally Posted By: OVERKILL
This is enough to give the PPM fanatics chest pains LOL


Yes it probably is. However I'm not at all concerned. It's a 1976 long block with stock steel shim gaskets still in place on the heads. Unknown service history, likely run on leaded fuel for a portion of its life on garbage (by today's standards) oil. It runs absolutely fantastic and the bearings looked great when I had the pan off (bearing clearances were good too) so what the heck run it. I have a new hydraulic roller 454 for the truck when I get around to installing it anyway.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: 76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi [Re: FlyNavyP3] #4719655
04/07/18 03:08 PM
04/07/18 03:08 PM
Joined: Dec 2016
Posts: 7,466
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,466
Waco, TX
I had a 77 K10 - does yours have the NP203 "full time" transfer case?


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: 76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi [Re: Linctex] #4719691
04/07/18 03:49 PM
04/07/18 03:49 PM
Joined: Sep 2010
Posts: 7,875
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,875
Texas
Originally Posted By: Linctex
I had a 77 K10 - does yours have the NP203 "full time" transfer case?


I recall putting a conversion kit in that along with locking hubs to run 2 WD when on the road

Re: 76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi [Re: FlyNavyP3] #4719697
04/07/18 03:55 PM
04/07/18 03:55 PM
Joined: Sep 2010
Posts: 7,875
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,875
Texas
So is this the first UOA after pumping a higher flow rate around in the old iron block?

Re: 76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi [Re: Linctex] #4720078
04/07/18 10:33 PM
04/07/18 10:33 PM
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
FlyNavyP3 Offline OP
FlyNavyP3  Offline OP
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
Originally Posted By: Linctex
I had a 77 K10 - does yours have the NP203 "full time" transfer case?


No, this truck has a SM465 4sp stick and a NP205 transfer case.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: 76 K10 Chevy 350 Delvac 15w40 2.5 years 1,100 mi [Re: 4WD] #4720079
04/07/18 10:33 PM
04/07/18 10:33 PM
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
FlyNavyP3 Offline OP
FlyNavyP3  Offline OP
Joined: Jul 2016
Posts: 1,743
Jacksonville, FL
Originally Posted By: 4WD
So is this the first UOA after pumping a higher flow rate around in the old iron block?


Yes it is.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander

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