Help with O2 sensor and PCV Valve
03-05-2003, 01:28 PM
#1
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Join Date: Feb 2003
Posts: 101
Help with O2 sensor and PCV Valve
I bought the Haynes Manual and it didn't help me too much. I'm new to car repairs, so that is probably why... I have a 92 Maxima SE and I'm not sure where the PCV valve is located. Can anyone help me by giving me moron step by step directions to the damn thing?
Also, I tried to unhook the O2 sensor to see if it made any difference in my car... but it was on so tight I couldn't get it off. I was afraid I would break one of the pipes before I could get the sensor off. I used some grease to try to loosen it, but it didn't help.
Any tips or help (besides take it to a mechanic) would be greatly appreciated.
Also, I tried to unhook the O2 sensor to see if it made any difference in my car... but it was on so tight I couldn't get it off. I was afraid I would break one of the pipes before I could get the sensor off. I used some grease to try to loosen it, but it didn't help.
Any tips or help (besides take it to a mechanic) would be greatly appreciated.
03-05-2003, 01:31 PM
#2
I suggest searching, I wrote a step by step process in a thread before of how to remove the PCV valve. If you can't find it just e-mail me and I'll explain the process once again. The location of the PCV valve is where the intake manifold says Nissan look stragiht down between the firewall and engine and you will see a hose going into the PCV valve.
03-05-2003, 01:33 PM
#3
found it
PCV: I have a 1992 DOHC engine and it's said to change the PCV valve on my engine is very hard, took me 10 minutes. There is a hose that goes into the pcv valve that has a 90 degree angle to it so it makes it hard to move clamp so what I did was hold the clamp open and pull the hose and I came off easily. Get a 3/4 long socket and a pretty long extension and put it on top the pcv and loosen until it comes out. Now putting in the new pcv in a DOHC engine is a little tricky you need to use a spark plug tool the one that is bigger than the one we use actually for our spark plugs, I forgot the size. Put it in there so it won't drop out and put it in start tightening it just little once it went in a little, take out the spark plug tool and use the regular 3/4 socket and tighten until it gets snug and that's it. To put back the hose hold the clamp open and put the hose in and release the clamp and that's it.
PCV: I have a 1992 DOHC engine and it's said to change the PCV valve on my engine is very hard, took me 10 minutes. There is a hose that goes into the pcv valve that has a 90 degree angle to it so it makes it hard to move clamp so what I did was hold the clamp open and pull the hose and I came off easily. Get a 3/4 long socket and a pretty long extension and put it on top the pcv and loosen until it comes out. Now putting in the new pcv in a DOHC engine is a little tricky you need to use a spark plug tool the one that is bigger than the one we use actually for our spark plugs, I forgot the size. Put it in there so it won't drop out and put it in start tightening it just little once it went in a little, take out the spark plug tool and use the regular 3/4 socket and tighten until it gets snug and that's it. To put back the hose hold the clamp open and put the hose in and release the clamp and that's it.
03-05-2003, 01:53 PM
#4
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Originally posted by D-sta
There is a hose that goes into the pcv valve that has a 90 degree angle to it so it makes it hard to move clamp so what I did was hold the clamp open and pull the hose and I came off easily.
There is a hose that goes into the pcv valve that has a 90 degree angle to it so it makes it hard to move clamp so what I did was hold the clamp open and pull the hose and I came off easily.
03-05-2003, 09:02 PM
#6
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Originally posted by D-sta
No there isn't a pipe. There is a hose going into the PCV valve that has a metal clamp, thats it.
No there isn't a pipe. There is a hose going into the PCV valve that has a metal clamp, thats it.
Is the hose right next to the oil cap?
Thanks
03-06-2003, 09:14 AM
#7
Originally posted by TLM
It felt like there was metal pipe inside the hose to me
Is the hose right next to the oil cap?
Thanks
It felt like there was metal pipe inside the hose to me
Is the hose right next to the oil cap?
Thanks
You cannot see the PCV just looking down on the engine. Look behind your intake manifold (the big metal piece that says NISSAN at the top). Look between it and the firewall on the passenger side. You'll see a rectangular metal plate on the backside of it that is held on by 6 or 8 bolts. Look down another 2 inches or so and you should see the PCV valve. It has a hose going into it that makes a sharp 90 degree turn right on top of it. If you have a 5spd, it is just below a vacuum hose for the power valve (thin rubber hose that leads a to a thin metal hose that makes a 90 degree turn also)
I had trouble getting the new one thread in correctly so I zip tied the rubber hose out of the way while I put the new PCV valve in and that helped.
03-06-2003, 03:22 PM
#8
I was taking some pics of some other stuff in the engine bay so I got a couple shots of the PCV valve for you
this is between the intake manifold and the firewall (looking towards the front of the car)
it's circled in the first pic and a closer shot in the second one
http://craigbrace.homestead.com/files/maxima/pcv1.jpg
http://craigbrace.homestead.com/files/maxima/pcv2.jpg
for the O2 sensor, try some liquid wrench or WD40 on the fitting
this is between the intake manifold and the firewall (looking towards the front of the car)
it's circled in the first pic and a closer shot in the second one
http://craigbrace.homestead.com/files/maxima/pcv1.jpg
http://craigbrace.homestead.com/files/maxima/pcv2.jpg
for the O2 sensor, try some liquid wrench or WD40 on the fitting
03-06-2003, 03:34 PM
#9
Originally posted by «§»Craig B«§»
I was taking some pics of some other stuff in the engine bay so I got a couple shots of the PCV valve for you
this is between the intake manifold and the firewall (looking towards the front of the car)
it's circled in the first pic and a closer shot in the second one
http://craigbrace.homestead.com/files/maxima/pcv1.jpg
http://craigbrace.homestead.com/files/maxima/pcv2.jpg
for the O2 sensor, try some liquid wrench or WD40 on the fitting
I was taking some pics of some other stuff in the engine bay so I got a couple shots of the PCV valve for you
this is between the intake manifold and the firewall (looking towards the front of the car)
it's circled in the first pic and a closer shot in the second one
http://craigbrace.homestead.com/files/maxima/pcv1.jpg
http://craigbrace.homestead.com/files/maxima/pcv2.jpg
for the O2 sensor, try some liquid wrench or WD40 on the fitting
03-06-2003, 09:17 PM
#10
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Join Date: Feb 2003
Posts: 101
I was honestly thinking to myself today... "This Haynes manual sucks ***... this doesn't even look like my engine. Craig's site and tips are so much easier to follow."
Thanks Craig. I'll look for it (again) tomorrow. I looked for the metal piece but I didn't see it (or at least not as clearly as in your pics.)
Is your car VE or VG? Does it matter, or would they be in the same place anyways? Mine is a 92 VE.
Thanks Craig. I'll look for it (again) tomorrow. I looked for the metal piece but I didn't see it (or at least not as clearly as in your pics.)
Is your car VE or VG? Does it matter, or would they be in the same place anyways? Mine is a 92 VE.
03-07-2003, 09:12 AM
#11
Originally posted by TLM
I was honestly thinking to myself today... "This Haynes manual sucks ***... this doesn't even look like my engine. Craig's site and tips are so much easier to follow."
Thanks Craig. I'll look for it (again) tomorrow. I looked for the metal piece but I didn't see it (or at least not as clearly as in your pics.)
Is your car VE or VG? Does it matter, or would they be in the same place anyways? Mine is a 92 VE.
I was honestly thinking to myself today... "This Haynes manual sucks ***... this doesn't even look like my engine. Craig's site and tips are so much easier to follow."
Thanks Craig. I'll look for it (again) tomorrow. I looked for the metal piece but I didn't see it (or at least not as clearly as in your pics.)
Is your car VE or VG? Does it matter, or would they be in the same place anyways? Mine is a 92 VE.
like I said, you wont be able to see it looking down on the engine from the front, you have to get way back there and really look down onto the backside of the engine (a flashlight would probably help too)
03-07-2003, 03:17 PM
#12
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Originally posted by «§»Craig B«§»
mine is a VE so it should be exactly the same, VGs have the valve higher up on the back of the manifold so it's a little easier to get to I think
like I said, you wont be able to see it looking down on the engine from the front, you have to get way back there and really look down onto the backside of the engine (a flashlight would probably help too)
mine is a VE so it should be exactly the same, VGs have the valve higher up on the back of the manifold so it's a little easier to get to I think
like I said, you wont be able to see it looking down on the engine from the front, you have to get way back there and really look down onto the backside of the engine (a flashlight would probably help too)
03-11-2003, 01:20 PM
#15
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Join Date: Feb 2003
Posts: 101
Originally posted by DA-MAX
if you look up D-sta already posted the directions for you.
if you look up D-sta already posted the directions for you.
03-11-2003, 04:35 PM
#16
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Join Date: Mar 2003
Posts: 19
I was able to push the heater hose out of the way to get my hand down there better. I also used the suggestion about a deep socket to get the PCV Valve out and back in. Worked great! Don't drop the new PCV Valve behind the engine. I did this and spent a hour trying to find the **** thing. Might have been easier to go buy a new one, but i would have had to put the old one back in... That may have taken longer!!! 
Also note: Take your old PCV Valve with you to the parts store. I went to two different places, and the one they gave me did not look like the one that I pulled of my car. I eyeballed one, and it worked.
Good Luck!
Also note: Take your old PCV Valve with you to the parts store. I went to two different places, and the one they gave me did not look like the one that I pulled of my car. I eyeballed one, and it worked.
Good Luck!
03-11-2003, 07:14 PM
#17
Originally posted by jwagen02
I was able to push the heater hose out of the way to get my hand down there better. I also used the suggestion about a deep socket to get the PCV Valve out and back in. Worked great! Don't drop the new PCV Valve behind the engine. I did this and spent a hour trying to find the **** thing. Might have been easier to go buy a new one, but i would have had to put the old one back in... That may have taken longer!!!
Also note: Take your old PCV Valve with you to the parts store. I went to two different places, and the one they gave me did not look like the one that I pulled of my car. I eyeballed one, and it worked.
Good Luck!
I was able to push the heater hose out of the way to get my hand down there better. I also used the suggestion about a deep socket to get the PCV Valve out and back in. Worked great! Don't drop the new PCV Valve behind the engine. I did this and spent a hour trying to find the **** thing. Might have been easier to go buy a new one, but i would have had to put the old one back in... That may have taken longer!!!
Also note: Take your old PCV Valve with you to the parts store. I went to two different places, and the one they gave me did not look like the one that I pulled of my car. I eyeballed one, and it worked.
Good Luck!
I have pretty big hands and I was able to do it TLM, keep on trying.
03-12-2003, 09:05 PM
#19
Senior Member
Join Date: Nov 2000
Posts: 119
Good question....
When I did a tune up last year I bought a PCV valve. The Haynes manual had a good clear picture and I looked at pictures here. None looked like what I had on there. It was metal and to hard to get off. Is that the breather you're talking about?
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