Hello everyone! Just purchased my Tahoe today with the hopes to resurrect it. Ended up going from and S2000 to a Tahoe so a big momentum shift. So far i'm having a few problems. I found a radiator fluid leak between Spark plugs 8 and 6 ( Passenger side at the rear). It's coming out of the square bolt below. I pour water in, and it comes out the center of that inside square looking bolt. I don't know the part number nor do I know what its called.




Thank you, I would appreciate any help.

 

It's a pipe plug you can probably get it at a hardware store or auto parts store,how many miles on it that water looks really rusty i would be thinking about a flush and going thru the the cooling system

 

Thank you Shamrock. I went to autozone and Oreilly's and the people i talked to never seen/heard of such a thing... go figure. I ended up picking up a set of squares at harbor freight and will be pulling it out today. I am not sure what caused it to blow, but it did in the center. Currently the truck idles rough, i pulled the plugs and they were all black, cleaned the throttle body which was also carbon'd up. replaced plugs/wires/cap/rotor. I connected a fuel pressure gage to the shrader valve, let the pump prime and the gage barely went up. Started the tahoe pressure went up to 62 psi steady, still a rough idle. I ended up ordering the updated spider injectors, regulator, fuel filter, gasket set. I plan on cleaning the whole intake manifold and replacing some parts. hopefully that will get rid of the rough idle.

99 Chevy Tahoe 4dr 2wd 144k miles.

 

Use some thread sealer when replacing the bolt.

 

I ended up having to take the pipe plug with a 7mm square head. I picked up an assorted set of pipe plugs from autozone and a 1/2" head ended up fitting in there with some permatex.



Letting it sit for a day, then going to flush the radiator out, hopefully that is the only thing wrong with it. Still unsure what caused it to go out.
I get my Delphi FJ105666 SCPI to MFI conversion today from amazon. Already have the Felpro gasket kit and bolts.

 

Turns out the Tahoe has 0 psi on cyl 4. In the process of parting it out. anyone want the updated fuel injector spider Delphi FJ105666?