Hi all,
I'm in the process of installing a downpipe, but the lower, rear nut on the precat is refusing to give in....

It's been soaked in PB several times a day for the last couple days, but still is hanging on for dear life.

Is there anything else I can do to convince it to come off?
I was thinking about taking a small wire brush on the dremel and work away a little of the rust/grime between the nut and stud, and then soaking it some more.

Any ideas would really be appreciated, I'd really like to get that nut off over the weekend some time.

 

https://www.rx7club.com/showthread.p...ng+turbo+studs

 

Are you going at it from the top or from the bottom? If I remember right, that nut was the one that gave me trouble too (still have a nice scar on my finger from when the wrench slipped, little bastard). It ended up being easier from the bottom if I remember right.

If all else fails, hit the nut with a torch for a few seconds and heat it up. Once the metal expands it should be able to be removed. I know it's nearly impossible to get to, but if you can get to it, the torch would certainly help.

 

Are you stripping the nut, or just can't turn it?

If it's stripped pound on an old socket that is just a tad too small ( I know there is almost no room) once it's on securely you should be able to get it off. If your problem is the latter, breaker bars do wonders.

X...

 

The nut is still good, it just won't come loose.
I already had a two foot extension slipped over the wrench to try and break it free, but also don't want to put too much pressure on and break the stud. In the mean time, I'll keep soaking the sucker...
Maybe I'll go and get a small propane torch and try heating it up some (I wonder how flamable PB and WD-40 are

Thanks guys, I will keep at it, hopefully my patiance will be rewarded In the mean time I think I'll isntall some ground straps...

 

That nut is easily accessible from the bottom, so I think you could accurately control a propane flame from there. Try to evenly heat the nut up and then tap the stud with a ball peen hammer.

Sonny

 

Yah, they don't like to come off. I had trouble with the upper rear so I used my torque wrench. When I removed my cat-back I had to wack my socket wrench with a hammer to break it loose! Becareful though, that upper rear nut finally sheared off leaving the screw in place so I just got another nut but the lower ones are best reached from under the car (I removed the tire too).

 

After a lot of patiance, and PB Blaster..., it finally came off. Unfortunately the downpipe I got won't fit... The flange to the cat sits too high and over towards the passenger side.... It also seems to be slightly twisted with regard to the cat flange, argh...

 

Sounds like it is one of the eBay downpipes that requires you to run the matching midpipe. I had the same thing happen to me. It sucks.

Sonny

 

Actually, it from a shop well know on this forum, with a good reputation. I just don't want to post the name here to give them a chance to recitfy the situation first.

 

if you couldn't get it off, i would have suggested the use of a tool called a "nut splitter", i would go with one of those and just crack off the nut with out harming the stud which is a real bitch to replace and then just buy a new nut from someone/someplace

here are a few links to what im talkign about http://www.jcwhitney.com/webapp/wcs/...&storeId=10101

http://www.jcwhitney.com/webapp/wcs/...&storeId=10101

do a search on the internet and you should find one for cheap, hell go down to sears and get one from craftsman, its warrentied for life


(note to self: buy things from sears/craftsman, life time warrenty with no questions asked kicks ***! especially for those which use their wrenches as breaker bars or hammers and screwdrivers as pry bars and regular sockets as impact tools you know who you are!)

 

Depending on space available you could use a dremel and cut the side of the nut to eventually peel it off. Or use a hammer and chisel to split the nut. Both instances it will fall right off. I don't know how much space you have available but this works almost everytime.. and it's safer than the fire wrench.

 

i dont think you can get a hammer in there, hence i suggested a nut splitter

 

ah.. yeah i never read the whole post.. nor do I know the exact location he's talking about. I'm just throwing my $.02 based on my personal experiences.

 

That fitment issue is the pits. I went ahead and bought a Bonez DP and hi-flow and they connected perfectly.

 

A really, really big breaker bar. Or some pipes on the end to get you some leverage.

 

^^ its off
fitment issues now

sucks man, maybe his shop can fix it for ya or something

 

dayum, reading these stories makes me so happy that the nuts on my precat came out with a small(!) wrench. haha. i was really shocked! but afaik the turbos were not replaced, so i dont know why they came out that easy.
~58000 kilometers (not miles!) on the car

 

sometimes you rip the stud off though and then you gotta drill out the stud...

 

The pipe is being taken care of, they're sending me a new one.