Oil pressure issue

[DamnYankee]

There are about 4 different ones you can get, red, blue, green or brown. I'm thinking the blue was the thickest one for the 6.0L truck engine. I'm probably wrong though.

Yeah - we know how you're alwaayyyyyyys wrong....

[Ramsey]

There are about 4 different ones you can get, red, blue, green or brown. I'm thinking the blue was the thickest one for the 6.0L truck engine. I'm probably wrong though.

im going with red ,i had the same problem ,gm says red is the thickest..i put it in and fine .these orings need to be adressed,its a constant problem and alot of trouble for a crucial part.but i think he said he checked it ,although it could be wrong 1 .

[SCIV]

Update? Inquiring minds want to know.

[farmtruc]

The oil pump was fine and installed right.

The oring was fine and installed correctly too, I've never had an issue with these. We put another new one in just in case.

To be honest we didn't build the rotating assembly, the machine shop did. We took over after the crank, rods and pistons.

The engine is out and we're checking the clearance today.

I know what the manufacturers say they want, but what clearances are standard amont the ls1 builders for the mains?

I'll check the cam bearings too.

thanks,
allen

[RedHeartbeat]

Have the crank bores miked for roundness. You can do it with a set of calipers if you're meticulous. A dial bore gauge would be best. Torque the caps to finish torque levels and then check them. Also, check that the caps are snug in their positions without bolts in them. There's a slight interference fit on a good cap. If not, time for some billet caps or just have a machine shop re-align hone the mains. They'll have to take a couple thousandths off the mating surface of the caps and then hone the main bores.

[NITROUS]

Allen, stick with the GM specs, you can't go wrong. I'd stick with .001" - .002"

CONNECTING ROD:
Bearing Bore Dia.: 56.505-56.525mm / 2.224-2.225"
Bearing Bore O-o-R (P): 0.004mm / 0.00015"
Bearing Bore O-o-R (SL): 0.008mm / 0.0003"
Bearing Clearance (P): 0.015-0.063mm / 0.0006-0.00248"
Bearing Clearance (SL): 0.015-0.076mm/0.0006-0.003"
Bearing Width: 24mm / 0.9449"
Side Clearance: 0.11-0.51mm / 0.00433-0.02"
Center to Center: 154.89mm / 6.098"
Piston Pin Bore Dia.: 23.97mm / 0.9436"
Piston Pin Boss Width: 24mm / 0.9449"
Piston Pin Press Interference:0.020-0.043mm / 0.0008-0.0017"
Rod Bolts: M9 x 1" (replace with ARP/Katech if > 450HP)

CRANKSHAFT:
Rotation = Clockwise (looking at front of block)
Bearing Clearance (P): 0.018-0.054mm / 0.0007-0.00212"
Con Rod Journal Dia. (P): 53.318-53.338mm / 2.0991-2.0999"
Con Rod Journal Dia. (SL): 53.308mm Min. / 2.0987" Min.
Con Rod Journal Taper (P): 0.005mm / 0.0002"
(Maximum for 1/2 Journal length)
Con Rod Journal Taper (SL): 0.01mm Max. / 0.0004" Max.
Con Rod Journal O-o-R (P): 0.005mm / 0.0002"
Con Rod Journal O-o-R (SL): 0.01mm / 0.0004"
Con Rod Journal Width: 48.37mm / 1.902"
End Play: 0.04-0.2mm /0.0015-0.0078"
Main Journal Dia. (P): 64.993-65.007mm / 2.558-2.559"
Main Journal Dia. (SL): 64.993mm Min. / 2.558" Min.
Main Journal O-o-R (P): 0.003mm / 0.000118"
Main Journal O-o-R (SL): 0.008mm / 0.0003
Main Journal Taper (P): 0.01mm / 0.0004"
Main Journal Taper (SL): 0.02mm / 0.00078"
Main Journal Width: 22.99mm / 0.905"
Reluctor Ring RO: 0.25mm / 0.01"
(Measured @ 1.0mm/0.04" below tooth Dia.)
Crank RO : 0.05mm / 0.002" (Measured at rear flange)
Flywheel Bolt Base Circle: 78.99mm / 3.110"
Stroke: 92mm / 3.622"
Rear Seal ID: 114.99mm / 4.527"
Thrust Wall RO: 0.025mm / 0.001"
Thrust Wall Width (P): 26.14-26.22mm / 1.029-1.032"
Thrust Wall Width (SL): 26.32 Max. / 1.036" Max.

[farmtruc]

main bearings are toast! I'll keep you guys updated.