Ok guys, so when I start my truck..I get a slight "knocking" sound for the first minute or so. Now that it's getting colder it seems to last longer than the usual minute. I have 60 psi of oil pressure, and I run 91 octane gas.
Any ideas?? Thanks.
start up knock???
Ok guys, so when I start my truck..I get a slight "knocking" sound for the first minute or so. Now that it's getting colder it seems to last longer than the usual minute. I have 60 psi of oil pressure, and I run 91 octane gas.
Any ideas?? Thanks.
Jeremy
2000 Sierra 4x4 Denali front, 5.3, 3/4 drop, 22 foose speedsters, roll pan, Cold Air, Cat-back.
The noise is normal. GM uses low-friction forged pistons in these engines, they are smaller when not at normal operating temps. So when you start your engine cold, you are hearing piston slap. Do not worry about it. When I worked for GM, if a customer called and complained about the noise, GM would issue the customer a "component letter" that covered the engine, all internals, all seals and gaskets, water pump, oil pump, etc, for 10 years or 100,000 miles, whichever came first, to give peace of mind to the customer.
im with em dont worry about i have a tahoe thats been doing it for 100k .runs like a charm ,just keep youre oil cahnged regularly.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
You should use 5W-30 year round. Synthetic primes thru the oiling system faster if it is very cold, and is better if you "wind up" the engine frequently. But even here in AK, I just use Pennz 5W-30 non-synthetic.
Tell her it needs a new motor and go get a 6.2l and a 6l80.
i m with him.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
Oh man Ive been trying to convince my girlfriend that I needed a valve job and that i would need a new cam and everything.
I hope thats its only piston slap. What weight oil should i be running in the cold? i have almost 120,000 on my 5.3 now. thanks
Jeremy
2000 Sierra 4x4 Denali front, 5.3, 3/4 drop, 22 foose speedsters, roll pan, Cold Air, Cat-back.
Good ole Mobile 1 5w-30 alone with some lucus synthetic engine oil stabilizer.
The EXACT combo I run.Originally Posted by Slimsilverado
2000 ECSB 6.0L
TORQUER V2 CAM ● COMP 918's ● 7.4 HARDENED PUSHRODS ● K&N SERIES 77 CAI ● 80mm BBK ●PACESETTER LT HEADERS AND 3'' ORY ● SUPER 40 FLOW ● 3000 STALL ● 4.10s ● BUILT 80e ● VORTEC PERFORMANCE TUNE ● MSD 8.5mm PLUG WIRES● ELEC. CUTOUT ● UD & ALT PULLEYS ● FLEX-A-LITE E-FANS ● 22" CENTERLINE STINGRAY III's ● LUND FIBERGLASS TONNEAU ● 2" LEVELING SHACKLES ● 12K HID LOWS & FOGS ● LEDs ● DEBADGED ● WHITE-FACED ESCALADE GAUGES ● KICKER 450.1 ● 2-CVR 10's ● DS60's ● K693's
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