95 325i water pump studs

mzaayer · 10-07-2010, 08:14 AM

I need help please! I was torquing the water pump and the studs broke. They have broken off with less than 1/2 an inch of the stud showing. I am going this afternoon to get a different stud puller hopefully it will work. Anyway my question is where do I get new studs at and how long are these studs. And are these 10mm studs? I have never had this happen before so this is something new to me. Any of you experts advice would be much appreciated.

Thank You.

JhwShark · JhwShark's Garage

Spray PB Blaster (dont think wd40 will do it wont) on the stud and let it soak in and re spray give it time...a day...
Then use your puller or I have been successful with a vice grip after the good soaking and time.

Source the stud: call BMW parts to get the dimensions and price then check NAPA or machine shops for studs. Some of the manuals (depends on which have dimensions).

Might as well replace all the studs, depending on if they go through the casing or not use suitable sealant or anti-seize on the threads. Someone may add to what is best in this regard.
Jon

mzaayer · 10-08-2010, 08:05 PM

Thank you Jon for your advice. I have to replace all four of them they all broke. I tried the vise grips turned them a little and then they started to slip. I ordered a set of puller sockets today so will give it a go after I get them. This has been a mess thought water pump was leaking and took all apart was cleaning things and seen a crack on the bottom of the water outlet so have had car apart for 2 weeks now waiting for parts and then went to put back together and this happens. Anyway it has been fun working on it just ready to finish it up. I have had to drive my baby every day (97 750il) since this happened and this car has never been driven this much.

mzaayer · 10-13-2010, 07:51 PM

Well I got 2 studs out and looks like I am going to have to drill and tap the other 2 out as they were broke off to close to the block. I also called BMW and they could not give me the dimensions of the studs and can not order new ones. So I am not having as much fun anymore.