I replace the intake gasket of a 96' Jimmy 4.6 now it wont start I was thinking if it could be out of timing

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.

Remove the manifold add sealant to both sides of the gaskett and tighten from the midlle outwards.touque is about 20LBSsqinch.That should work fine

I found the problem and 99 jimmy is running great now. the major problem was the intake manifold gaskets sucking air and causing random misfire codes(bad fuel/air ratio) but also we pulled the distributor as well because from 87-99 the drive gear was made of soft material and sure enough 3 teeth on the dist gear were almost worn right off. We also replaced this with 120$ new rebuilt unit.
Intake gasket kit is approx 100$ and no more than 2 hrs labour and the distributer is real easy to pull and replace once the intakes are off so this is a good time to check dist with little extra labour.

richard

your intake is leaking, .it does happen ,please dont drive the Jimmy,because the antifreeze will distroy your bearings,

You said the problem happened right after the engine was replaced correct? If so bring number cylinder to top dead center on the compression stroke. Remove the distributor cap and see if the rotor is lined up with the number one spark plug wire. It's possible the distributor was installed 180 degrees out.

Is it even trying, backfire, crank real fast. Or just won't start at all no matter what you do? Also is the gas good?

is the distributor put back in the exact same place....it can't be a degree off

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,

its imposible that a car wont start because of egr valve the egr valve is under the upper radiator hose on the intake hope it help pierre