Is it possible to tell externally if a motor has a Felpro LIM Gasket? i'd like to avoid having to fuss with it if its already been repaired and new gaskets are expensive so at the risk of ruining a possibly good one it'd be nice if there was a way to tell on the outside.

As for the odds n ends - whats the thread type/count and pitch on a 1999-2000 4.3L Crank bolt? this poor things been abused and has some gunk that looks like JB Weld all inside it and the crankbolt is stripped right off so it more then likely needs to be retapped or even worse reamed.

 

I would think that even if the LIM gaskets are not the nice Felpro ones, it could be 10 years before it is an issue.

 

In that case i'm just going to go and replace them, talking to the previous owner they dont know if they were ever replaced either and the vehicle never had any servicerecords with it when he or I got it. I assume the procedure is about the same as replacing any seals, drain the antifreeze from the block so it doesnt **** all over the liftervalley, pull the Intake manifold off, replace and reverse the steps with new RTV on the chinawalls

 

If you are going to replace the LIM gaskets yourself, you'll find the attached files useful. They are copies of a webpage that apparently disappeared but that I and others found useful.

Be sure to use new, good quality RTV. I used the stuff that came from FelPro and I think it was not as good in quality as it could have been.

I also took the opportunity to change out the fuel injectors with the remotely controlled nozzles from the original ones that are centrally controlled.
(https://www.motormanfuelinjection.co...onversion.html)

 

Thanks for the info, i'll look into that MFI swap also. while im in there is there any way of converting over to a modern coilpack system or atleast switching from a points distributor system over to something less failure prone?

 

coil pack system ? coil over each plug - not that I know of and Inless someone did some major clustering you don't have a point system.
I don't know of a old school point style distributor that would even fit a 4.3

 

I don't think any Blazers, especially the 2nd generation, use actual points. They have a mechanical distributor but use an inductive pick-up. Except for replacing the coil, rotor, wires and plugs, they need little maintenance and work fine. It seems like for the age of our current 2nd gen Blazers, changing out the plugs, wires, cap and rotor are about a once-(and very maybe twice)-in-a-lifetime type of replacement. If you are having issues with your distributor, be sure to to use AC-Delco parts for the cap and rotor. The distributors seem to be very picky.

 

its mainly that i live in Florida which is a very wet and hot envrioment, so corrosion becomes an issue alot quicker then it aught to.

 

Might just be the terminology, Cant think of a better way to describe it really.

on another note, Does anyone know the thread type and size for a 2000's Crankbolt?