How much time to remove upper intake manifold?
#1
How much time to remove upper intake manifold?
I need to have my upper manifold removed to access the rear fuel injectors. My mechanic says it will take him 3 hours of charged labor. I've looked at the Haynes manual and while I see that there's a bunch of hoses that need to be removed there, is that a good estimate for labor cost?
Also, we think I have a leaky fuel injector, and says I may need to replace the fuel injector itself. Is this possible, since I thought if it's leaky but functional I'd only need to replace one of the o-rings around the injector?
Thanks
Also, we think I have a leaky fuel injector, and says I may need to replace the fuel injector itself. Is this possible, since I thought if it's leaky but functional I'd only need to replace one of the o-rings around the injector?
Thanks
#2
If the injector is leaking it has an internal failure unless its just leaking around the 0-ring. By leaking do you mean running all the time letting gas into the engine or is there no compression?
I just pulled off my intake for the first time the other day. The first time doing it it took a while cause i didn't know where anything was. You need to first unbolt it from the front and then there are seven vacuum lines around the intake. on the back of the intake facing the fire wall you need to unbolt the EGR and the coolant line there. disconnecting the throttle cable is optional, you can just let it hang off to the side, your choice. i could prolly do it now in about a 45min-1 hour.
I just pulled off my intake for the first time the other day. The first time doing it it took a while cause i didn't know where anything was. You need to first unbolt it from the front and then there are seven vacuum lines around the intake. on the back of the intake facing the fire wall you need to unbolt the EGR and the coolant line there. disconnecting the throttle cable is optional, you can just let it hang off to the side, your choice. i could prolly do it now in about a 45min-1 hour.
#4
it should only take a couple of hours to remove the manifold.....there are multiple things that cause leaky injectors.....IMO i feel it better to replace the whole thing with new o-rings and all just to make sure u got the cause and dont have to rip it apart again
#7
Originally Posted by MaximaSE96
it should only take a couple of hours
Hours?? if it takes anyshop more than an hour of labor to remove it then they are ripping you off... its easy to remove... i can take it off replace all three injectors in and hour....
#10
Originally Posted by LiGhtSoUt
so from everyones experience its not needed to disconenct the accelerator and cruise control cables? to remove the upper intake manifold
#12
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Originally Posted by f550maranello2
Hours?? if it takes anyshop more than an hour of labor to remove it then they are ripping you off... its easy to remove... i can take it off replace all three injectors in and hour....
Having done in it about 5 times, I would be able to un-install in about an hour, and reinstalll in an hour. So I would think someone thats not familiar with it 100%, 3 is decent
If you know how to do general wrenching on a car, do it yourself. Its pretty straight forward.
-matt
#13
yea no kidding no shop is gonna charge u an hour to do all that... it should not take them an longer than an hour to remove it though... iv taken that crap apart like 10 times because on of the "new injectors" that i got was bad and i could not figure out which on it was.. so i had some good practice in doing it..
#15
Wow, it took me WAY longer than that when I did it. Taking it off was easy; putting it back was the biatch. If I remember correctly, there were a couple of bolts and hoses (with hose clamps) in the rear, and there's almost no room to get your hands and tools back there.
The hood really gets in the way too. I ended up taking the struts off and pulling it back, which cost me a new windshield...
The hood really gets in the way too. I ended up taking the struts off and pulling it back, which cost me a new windshield...
#16
Wow, it took me WAY longer than that when I did it. Taking it off was easy; putting it back was the biatch. If I remember correctly, there were a couple of bolts and hoses (with hose clamps) in the rear, and there's almost no room to get your hands and tools back there.
The hood really gets in the way too. I ended up taking the struts off and pulling it back, which cost me a new windshield...
The hood really gets in the way too. I ended up taking the struts off and pulling it back, which cost me a new windshield...
#17
The first time you ever do it, it will be horrible. It could take you quite some time. The first time I did it it took me forever. I had a really hard time removing the 2 bolts in the back of the manifold, along with the hose thats back there facing the passenger side of the car. Those two parts probably held me up about an hour or so. I remember wanting to just rip the manifold out of the car, I got so frustrated. But now I can take it apart in about 45 minutes and reinstall in about an hour. So you'll survive.
#19
if you're talking about the coolant hose going into the firewall, let me be the first to warn you to be extremely careful with those hoses. I had to remove one to get the pass. side rear UIM bolt out, and while I was twisting it, it snapped the neck of my heater core right off. It was brittle and fragile as a lightbulb. $400 later, I have heat again.
#20
if you're talking about the coolant hose going into the firewall, let me be the first to warn you to be extremely careful with those hoses. I had to remove one to get the pass. side rear UIM bolt out, and while I was twisting it, it snapped the neck of my heater core right off. It was brittle and fragile as a lightbulb. $400 later, I have heat again.
#21
It took me a couple of hours the first time I did it, but only 30 minutes to get it off for the 00VI swap. An impact wrench helped though.
When you take off the front bolts to the UIM, and get the rear ones off, you can move the UIM to remove the coolant lines.
Two things,
If the hood gets in the way, REMOVE IT, dont just undo the struts. It will crack your windsheild.
Dont touch the coolant lines going into the firewall.
When you take off the front bolts to the UIM, and get the rear ones off, you can move the UIM to remove the coolant lines.
Two things,
If the hood gets in the way, REMOVE IT, dont just undo the struts. It will crack your windsheild.
Dont touch the coolant lines going into the firewall.
#22
Taking the manifold off isn't that big of a deal. There are six bolts from the manifold itself (not including the EGR tube), the Intake assembly, throttle body, IAVC and any little sensor that's in the way. You'll get the hang of it within the first 10 minutes. Like everyone said, be very careful with the coolant line connected to the rear of the manifold, I nicked it twice already putting the manifold on and have had coolant leak while I'm driving.
#23
Sir713
Hi there, I was reading about the manifold that you have to remove on your car and I was wondering, I have a 2001 Nissan Maxima 3.0 L engine I think I have four bolts that have to be removed from the back but it's kind of difficult to do. Is it possible you may know someone who has change one before? If I only had a picture I can see all the bolt holes and that will give me a clear indication because I too have to take out my fuel injectors to be cleaned. If you have time to shed some light on this I would be most appreciated, thank you, Sir Tony
#25
Hi there, I was reading about the manifold that you have to remove on your car and I was wondering, I have a 2001 Nissan Maxima 3.0 L engine I think I have four bolts that have to be removed from the back but it's kind of difficult to do. Is it possible you may know someone who has change one before? If I only had a picture I can see all the bolt holes and that will give me a clear indication because I too have to take out my fuel injectors to be cleaned. If you have time to shed some light on this I would be most appreciated, thank you, Sir Tony
Go browse the 5th gen forum or use search to find the factory manual for your year. It really isnt hard to do though just label every hose and be careful not to strip the bolt holes when youre reinstalling.
#27
Just did mine for the second time in a week to take care of the oil leak on the rear valve cover. Takes 30 min to take it off. Not hard at all. The only thing is getting tot he 2 rear bolts and the coolant hose next to the EGR tube. I used an air ratchet for the bolts I could reach with it.
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