ssheen Posted January 5, 2006 Report Posted January 5, 2006 Hi, I searched but O2 seems to be too short to search for. For my wife's 94 Cutlass Supreme SL 3.1 v6. It has been a while I am sure since we had her O2 changed out. I do all the work on my own car and thought I would look to do this on hers. Before I do a couple of questions. How many O2 sensors does her car have? Are the easy to get to? Can you give directions as to where they are? Unrelated, where would the fuel filter be? Thanks for the help Scott Quote
Robby1870 Posted January 5, 2006 Report Posted January 5, 2006 It has one for sure and possibly two, I cant remember. The first one is before the catalytic converter on the rear exhaust mainfold, probably after the three branches of the manifold come together. If it has two, the other is after the catalytic converter. Quote
jeremy Posted January 5, 2006 Report Posted January 5, 2006 fuel filter is underneath the car, just ahead of the gas tank on the drivers side. Quote
ssheen Posted January 5, 2006 Author Report Posted January 5, 2006 Thought the fuel filter would be easy. What is the sensor on the front up and to the right of the oil filter? The O2 sounds like one has to reach from under the car? Quote
Supreme Cutlass Posted January 5, 2006 Report Posted January 5, 2006 Thought the fuel filter would be easy. What is the sensor on the front up and to the right of the oil filter? The O2 sounds like one has to reach from under the car? Oil pressure switch nah, just rock the engine forward Quote
ssheen Posted January 5, 2006 Author Report Posted January 5, 2006 Sounds like from the top. I did the alternator before, which was easy enough minus the accidental wrench welding I did. (Battery is always unhooked now ) What is involved to rock the engine forward? Quote
ssheen Posted January 6, 2006 Author Report Posted January 6, 2006 I did a search on the rock the engine forward. I had to laugh out loud at all posts to do that for the rear plugs. I hate doing the plugs on her car because of how hard it is. Looks like next I may have to try some of the tricks I have been reading about. Btw, My Daytona takes longer to find the tools than to change the plugs. Quote
Crazy K Posted January 6, 2006 Report Posted January 6, 2006 I like disconnect the dogbone mount's front bracket(s) from the radiator support, flip those back ontop of the engine, and use a ratched strap hooked from a support point on the engine and to the radiator support, and tighten it to tilt the engine. Quote
Supreme Cutlass Posted January 6, 2006 Report Posted January 6, 2006 Or, flip up the left strut, put the bolt back in it's place for leverage, pry it back, then use a bolt through the lobe on the other strut to keep the engine tilted. Quote
DiscoStudd Posted January 6, 2006 Report Posted January 6, 2006 FWIW, I never needed to rotate either of the 3100's I owned forward to change out the rear spark plugs. It's the older 2.8 and 3.1 MPFI motors that need to be rotated due to the shape of their intake manifolds. The "front" O2 sensor on the 3100 is on the driver's side of the rear exhaust manifold. It is difficult to get a "box-end" wrench on it, so I ended up purchasing the special "oxygen sensor removal socket." It's basically a 19mm 1/2" drive impact socket with a relief cut out of the side for the O2 sensor's wire to fit through. Hook the socket to a 3" extension and a breaker bar and that'll break 'er free. The "downstream" O2 sensor is, naturally, downstream from the catylitic converter. Your 94 isn't OBD-II, so the downstream O2 sensor serves no real purpose. You can skimp on changing it out... Quote
ssheen Posted January 6, 2006 Author Report Posted January 6, 2006 Thanks again for the help. Anyone have a pic of the O2 sensor, where it is, that would be helpful. Quote
SigEpCutlass Posted January 6, 2006 Report Posted January 6, 2006 I'm pretty sure that car has only 1 o2 sensor and it's at the back exhaust manifold, you'll have a lot of fun getting to it. Yea it is there. It's a bitch to get at b/c you have to remove a part of the manifold to change it more easily. That's part of the reason why mine hasn't been changed yet. :oops: Quote
SigEpCutlass Posted January 6, 2006 Report Posted January 6, 2006 FWIW, I never needed to rotate either of the 3100's I owned forward to change out the rear spark plugs. It's the older 2.8 and 3.1 MPFI motors that need to be rotated due to the shape of their intake manifolds. The "front" O2 sensor on the 3100 is on the driver's side of the rear exhaust manifold. It is difficult to get a "box-end" wrench on it, so I ended up purchasing the special "oxygen sensor removal socket." It's basically a 19mm 1/2" drive impact socket with a relief cut out of the side for the O2 sensor's wire to fit through. Hook the socket to a 3" extension and a breaker bar and that'll break 'er free. The "downstream" O2 sensor is, naturally, downstream from the catylitic converter. Your 94 isn't OBD-II, so the downstream O2 sensor serves no real purpose. You can skimp on changing it out... hrm maybe I'll give that idea a try disco. how much did that tool set you back? Quote
DiscoStudd Posted January 6, 2006 Report Posted January 6, 2006 Thanks again for the help. Anyone have a pic of the O2 sensor, where it is, that would be helpful. hrm maybe I'll give that idea a try disco. how much did that tool set you back?I don't remember exactly, couldn't have been more than ten or fifteen bucks... Quote
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