Are you talking about the manifold gasket? I'm replacing mine as soon as the part comes in, so I havn't taken a good look at it. But a cursory glance showed it should be pretty straight forward and all the work can be done from above (thank goodness). I don't see any reason to remove the O2 sensor to replace the gasket.
I don't know about any springs, I havn't removed the heat shield yet.
I ordered the cheapest gasket I could get, it was $7. So what if it doesn't last as long as the official toyota part, you'd have to replace it 7 times to make up the initial cost of the toyota part
(not that I have anything against dealer parts, I think they're the best parts around...but sometimes you just don't need the best parts.)
Sorry I wasn't clear, the gasket I refered to is the exhaust manifold to front pipe (donut).
The Front pipe on a 99 is secured with two bolts with springs pushing the pipe against the manifold, I can feel the leak and hear it too.
Sometimes it's better to get the toyota part and only change it once, when I did the brakes toytoa front pads were one of the inxpensive ones, jobbers were almost $20 higher.
You have to remove the manifold completely to replace either gasket (top or bottom). Possibly even to replace gaskets further down the exaust. So make sure you have both manifold gaskets before tearing into it.
I tried to replace the manifold gasket, but couldn't pull the manifold off enough to slide the new one in. It appears that the manifold has to be disconnected from the exaust pipe AND the engine block to get it to move more than 5mm.
To remove the manifold, you'll need 12mm and 7/16" deep sockets (the bolts are techinically 12mm, but some are corroded and the 12mm won't fit easily. 7/16" is just a hair larger than 12mm)
You'll also need various length extensions, I used a 3" and a 6", and of course, a breaker bar and a torque wrench.
Anyone change the exhaust gasket on a 1999 corolla?
Can't seen to find the right O2 sensor tool to remove the sensor so I can access the mainfold bolt, it's not a 22 mm!
If anyone did change the gasket, did you use a Toyota ($52.00 cdn) one and change the bolts ($6.00 ea) and the springs ($23.00 ea cdn)?
Thanks
hey i did my 1999 corolla last weekend. people were bitching that it should take 2-3 hrs to take off. i did everything in an hour. if you watch carefully there should be 5 bolts to the manifold shield, 3 bolts to the heat shield across the manifold (need to take this out because there will be no room if you leave it), 2 spring bolts, 2 o2 sensor bolts, and finally 1 final bolt next to both the 2 spring bolts. USE WD40 on all bolts so it'll be easier to take out and you won't ruin the bolts. seems like a lot but it's easy. the final bolt is the tricky one because there's basically no room. i didn't have to use a breaker bar at all, they all came out easily man. the 2 bolts holding down the 02 sensor, you have to get under the car for easy access. i didn't have to cause i had a 12" extension and a 2" extension so it was easy. i think those bolts are a 12 or 13, can't remember. after you take out those bolts, the o2 sensor is connected to a plate so it'll be tricky to get out. there's also the gasket. careful! with both it'll break. take a flathead and push both sides evenly out. DO NOT FORCE IT OUT! that's it. pretty simple.
as for the gaskets, i paid 43$ USD for donut gasket from TOYOTA. it should be thicker than the one on your car. it'll smoke after you put it on because it's new and gas has to run off of the gasket (toyota). run your car around for a couple miles. then it will stop and it'll be normal. and there you have it, you'll save 200$ doing it yourself. i took mines to the shop to get estimates and 200-400$ is not worth paying for a shop to install this little gasket. as for bolts, dont waste your money, just use the old ones. they should be fine. anyways do it and learn from it. later! any questoins, pm me!
You have to remove the manifold completely to replace either gasket (top or bottom). Possibly even to replace gaskets further down the exaust. So make sure you have both manifold gaskets before tearing into it.
I tried to replace the manifold gasket, but couldn't pull the manifold off enough to slide the new one in. It appears that the manifold has to be disconnected from the exaust pipe AND the engine block to get it to move more than 5mm.
To remove the manifold, you'll need 12mm and 7/16" deep sockets (the bolts are techinically 12mm, but some are corroded and the 12mm won't fit easily. 7/16" is just a hair larger than 12mm)
You'll also need various length extensions, I used a 3" and a 6", and of course, a breaker bar and a torque wrench.
i also replaced my manifold gasket while i was at it. you have to go through the same steps as i did replacing the donut gasket. im not sure but that's what i learned. hopefully ill have a step by step of everything i do so i can share with everyone! i dont find alot of these HOW-TO about corollas. later
while were on the topic, I'm about to attempt this aswell exvept I'm replacing the exhaust manifold. my question is it necessary to put those gasket sealants like the one tey use at muffler shops?
thank you
while were on the topic, I'm about to attempt this aswell exvept I'm replacing the exhaust manifold. my question is it necessary to put those gasket sealants like the one tey use at muffler shops?
thank you
can you be more clearer on what you're trying to say here? or are you talking about the exhaust manifold gasket seal? if so you dont have to. but it would be good. it may or may not be worn out...yet. also try replacing the gasket seal after the cat. it does not worn out easily but just in case. also replace the clamp. after a period of time, it stretches and that's where the exhaust leaks are coming. otherwise those are the 3 main seals i know of; manifold gasket seal, donut gasket seal, and the gasket seal after the cat (toyota guys told me). my car is 8 yrs old. everything looked great except that donut gasket. that's really a problem on corollas. at first i thought my exhaust leak was coming from the clamp, after the cat but that wasnt it. i took a look at it and it was in great condition, but i replaced it anyways in case it worns out.
Had a exhaust leak at the front pipe to exhaust manifold, where the exhaust gasket is (donut).
Counldn't get the O2 ssensor out because it was hitting the drivers side exhaust stud.
Removed the passenger side stud and with a wrench loosened the driver side, then was able to remove the O2 sensor, after that all went well.
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