My husband was trying to remove 4 long bolts out
If there is any of the old bolt still protruding from the housing, you may be able to force it out using a pipewrench, or other Stud-retracting tool. There is also a tool called an 'Easy-Out'. You drill a small hole in the bolt, and and this tool goes into the hole, and as you turn it, it 'grips' the old bolt, turning it out.
If these methods fail, then;
You will have to drill them out, and re-tap the threads in the holes. If the material that the bolts go into (the body of the pump) is made from a soft metal like aluminum, then you must be very careful when drilling, you must drill very straight. A Drill Press is recommended for this. After you have drilled out the old bolts, then get the proper Tap, and make new threads in the holes. Since you are making new threads, you will probably have to go to the NEXT bigger size of bolt, but make sure there is enough room, and material in the housing to accomodate the next larger size bolt.
good luck.
