My haines book doesn't have that info. I would like the instructions on removing and replacing the lower intake gasket on my jimmy. Can you please sent them to me. Personally, I would rather have one of the older type chiltons auto repair manual .like I had years ago, it explained everything, step by step in laymans terms. Please help.
Re: 93 gmc jimmy sle 4.3 L vorec lower intake gasket
Use a straight blade or scraper blade and carefully work corner to corner downward but before you do this be sure to plug the holes into the engine to keep any debris from entering engine block and causing any damage. when you have the old gasket off use a cleaning solvent and a wrag and clean the entire area where the new gasket is gonna be as to prevent any potential leaks or air pockets.
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Check all shift linkage under truck for loose bushings. Check also for bad transmission mount, engine mounts, bent linkage, etc. Also can be a problem inside transmission, often able to be fixed in the car by removing the trans lower pan to make repairs.
I had the same problem on a 2000 Jimmy and it turned out to be the intake manifold gaskets not the head gasket so you may wanna check that out before you start the grueling job of head gasket replacement intake gaskets are a much easier fix
I had this happen to me the first time I replaced my intake manifold gaskets. It was hard to install the intake and gasket moved just enough and I had a coolant leak. Removed manifold and installed new gaskets and problem was solved. Good Luck.
Here is a detailed summary on the procedure of how to replace the intake manifold gasket on a 1996 gmc jimmy;
REMOVING THE UPPER INTAKE MANIFOLD(PLENUM)
Disconnect Battery (may not be absolutely necessary, but a good practice to avoid shorting a positive wire to ground).
Remove serpentine belt.
Drain the coolant.
Remove air cleaner ducting and disconnect wires.
Disconnect throttle linkage and bracket.
Disconnect cruise control cable.
Remove brake booster vacuum hose at manifold.
Remove PCV hose.
Remove ignition coil and bracket.
Remove purge solenoid and bracket.
Relieve fuel pressure at test port.
Remove fuel lines and bracket.
Remove upper intake manifold.
REMOVING THE LOWER INTAKE MANIFOLD
Remove the distributor and label the spark plug wires.
Remove heater hoses and bypass hose.
Remove upper radiator hose.
Remove EGR valve?
Remove sensors and bracket on right side.
Remove EGR tube, clamp and bolt.
Remove PCV valve (and replace).
Unbolt A/C compressor and move it aside.
Loosen compressor bracket and slide forward, but do not remove it.
Remove alternator bracket bolt (or remove alternator and set aside)
Unplug all vacuum lines from intake manifold.
Unplug all electrical connectors from manifold.
Take note of the intake manifold bolts and mark the location of the bolts.
Remove intake manifold bolts, and manifold.
Clean mating surfaces
THE MAIN INSTALLATION
Set the new gaskets in place and apply silicone to flat areas on front and rear of engine block.
Apply thread locking compound to manifold bolts.
Install the manifold and tighten bolts to 35 ft-lbs, in proper sequence.
Install the distributor.
Install the upper intake manifold.
The remaining installation procedures are basically the reverse of removal.
I guess the burning question is , where is the coolant going. Is this a 4.3 engine? How many miles does the vehicle have? Has the intake gasket been changed? I'm guessing a can of "Bars Leak" may cure your problem. Let me know. Regards,