Marlon_JBT wrote:
TAHOE wrote:
tommudd wrote:
How many miles do you have on the Tahoe?
Pain to have to rebuild it but if you can find another motor to throw in then you can build one the way you want to. Torque monster on the way

126K. Lifter going out, it is getting loud and runs really bad until it finally build pressure. This is the first SBC I've ever had issues with this soon.
Just came in from doing some fencing, man it's hot out there today.

My mom's neighbor's 5.7L Vortec in his '99 Suburban just went out too. Must be something in the midwest air. We're thinking intake gasket, coolant mixing with oil, etc.
156K, that's pretty good mileage on the intake gasket, usually go by 100K
GM calls it "dexcool". Most people know it as Dexclog or Dexrust, or "install a new motor" the stuff is horrible. Then they put subpar materials in the intake gaskets which the Dexclog eats up and they start leaking. The S10's/Blazers are even worse as the heater core is slightly higher than radiator, this causes air pockets which speeds up the coolant in breaking down and forming clumps which clogs system. If you are lucky, they just leak out the front or back, if not, they leak into the inside and contaminate the oil. Bad part is that antifreeze loves to eat the main/rod bearing so it needs to be flushed asap.
Marlon, tell them if they are able to do a flush and get it running, make sure they use the new design intake gaskets with the metal plate in them and only a bead of silicone on the ends, not the rubber gaskets.
I changed my intake gasket couple years ago, but been fighting a low oil pressure issue which I think lead to the lifter failure. I'm picking up a used motor next weekend, once I get mine out, I will tear into it and see if I can figure out the problem. I'm figuring the cam bearing are wearing causing loss in pressure. Bet I got a damaged cam lobe too.
Nick, pretty cool having a family member playing there.
hope everyone had a nice weekend, I worked most of mine

but I finished my fencing for now

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'99 Tahoe, 3" BL, 285/75/16's , MT II's.
'05 Liberty Sport, -wifey's
'98 Poncho Fireturd, 3.8L, .....the purple pig!

