yes there is an "O" ring that forms a gasket under the distributer
If there is leaking around the base of the distributor, and you will need to replace the seal. The distributor oil seal is a paper gasket or rubber O-ring, and the distributor is removed to replace either one if the seal is leaking. It is easy to change, just remove distributor and change the seal.
If your sure that it is leaking around the distributor then replace the distributor gasket or O-ring. It could also be leaking oil out of the back of the intake manifold. Gasket or sealer may have moved while tighting the intake bolts. Could be coming from the oil sending unit behind the distributor too.
mine was leaking pretty bad. found out that on the 3.4 engine, there had been a design change on distributor location. originally it was on the back side of engine. when they changed this, they put a 'plug' in its place. plug always starts leaking. i took mine and lifted the 'plug' and used a gasket from a distributor. had to cut one side so that you could slip it around the plug, put gasket sealer on it and my leaking has dramatically decreased. not stopped. but not putting a quart in a week. the leak is alomost non exixtent
Send it out to be fixed. Special tools are needed as well as a lift. You should also change the water pump as it is used to tighten the belt And when you start moving it around, it is prone to leaking.
(This is from the 91 Caprice service manual for the HEI ignition system) Looking at the distributor cap from the front of the engine bay, and running clockwise around the cap from about the 1 o'clock position, the wire numbering is: 3,6,5,7,2,1,8,4
There is a heater hose that goes to the left rear top side of the intake manifold and that fitting leaks engine coolant sometimes and it will run down the back of the intake around the distributor. If that fitting is not leaking then the intake manifold gasket is leaking coolant in the corners of it. REplace the intake gasket. That's all that can leak coolant on that year engine. If coolant is leaking out between the transmission and engine block then you have a freeze plug leaking in the back of the engine, between the transmission and block. Must remove the transmission and flywheel to fix it.
Bring the number one cylinder on compression stroke up to TDC. Drop distributor in with the rotor pointing to the number one on the distributor cap. Install and tighten clamp with bolt. The clamp will only fit one way around the base of the distributor. This sets the initial base timing. The timing from there is adjusted by the ECM with information gathered from various sensors.
Usually you'll have some leaking around the plug... get a flexible necked mirror and a flashlight and look around it for leaking cooolant.
intake manifold gasket is leaking. They are famous for it around 80000 miles
Could damasge the distributor/hall sender leading to a starting fault.
To buy a Chevrolet Equinox i would recommend going to a local Chevrolet dealer, and the price of the Chevrolet Equinox ranges from thirty thousand to around forty thousand!
The toilet is likely leaking around the base due to a worn out wax ring or a loose connection between the toilet and the floor. This can cause water to seep out and create a puddle around the base of the toilet.