Bad Ass Black Trucks
New member
In the long list of things wrong with my truck I found another... I did the old hook up a bicycle inner tube to the upper IC trick to check for vacuum leaks. Well the throttle body is leaking out the shaft like crazy.
I know of several options and frankly I'm not sold on any of them just yet.
I understand that our throttle body has SyTy specific linkage and that a TPI IAC circuit on the bottom of the Throttle body is desirable unless you want to find a ZR1 IAC for an LT1 throttle body, which I'd rather not mess with.
Matt Blum no longer rebuilds our throttle bodies. I could get a $150 rebuild on e-bay with machining for 52mm blades but I'd have to deal with the hassle of shipping my TB out and paying for shipping both ways taking it up to ~$180 and a week or two of downtime. I could buy an aftermarket TB, either 52 or 58 mm but the performance of the stocker is adequate and I'd still have to deal with switching linkage around.
Can I rebuild my own throttle body? Has anyone made a tutorial? How do you get the linkage off? I read that it has to be drilled to be removed. Looking at the end of the TB shaft it looks like the end has been 'blunted' to keep the linkage on. Is that all that holds the linkage on? If you were to drill or mill end of the shaft is there room to 'blunt' it again? It seems as though the combination of the throttle cable and TV cable pulling on one side of the shaft really wears out the bushings on the syty throttle body. Has anyone tried case hardening the shaft and sourcing some more durable bushings? Are there any o-rings or seals inside that need to be replaced?
I know of several options and frankly I'm not sold on any of them just yet.
I understand that our throttle body has SyTy specific linkage and that a TPI IAC circuit on the bottom of the Throttle body is desirable unless you want to find a ZR1 IAC for an LT1 throttle body, which I'd rather not mess with.
Matt Blum no longer rebuilds our throttle bodies. I could get a $150 rebuild on e-bay with machining for 52mm blades but I'd have to deal with the hassle of shipping my TB out and paying for shipping both ways taking it up to ~$180 and a week or two of downtime. I could buy an aftermarket TB, either 52 or 58 mm but the performance of the stocker is adequate and I'd still have to deal with switching linkage around.
Can I rebuild my own throttle body? Has anyone made a tutorial? How do you get the linkage off? I read that it has to be drilled to be removed. Looking at the end of the TB shaft it looks like the end has been 'blunted' to keep the linkage on. Is that all that holds the linkage on? If you were to drill or mill end of the shaft is there room to 'blunt' it again? It seems as though the combination of the throttle cable and TV cable pulling on one side of the shaft really wears out the bushings on the syty throttle body. Has anyone tried case hardening the shaft and sourcing some more durable bushings? Are there any o-rings or seals inside that need to be replaced?
