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  #1  
Old 05-03-2003, 07:39 PM
djjeant
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broke hollow bolt

my friend was loosening the hollow bolt with three holes on it, the bolt goes on the high preassure hose on the sls pump, and it borke, any ideas on how to get it out, or how to get a replacement, i dont see mb part number anywhere, hes really sad cause we dont have an mb dealer in town and he bolt is really hard to get.i need all the info you can give me about the bolt

thanx a lot
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  #2  
Old 05-03-2003, 08:31 PM
djjeant
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yeah the sls pump is really easy to remove, ill remove it tomorrow and im going to take it to several shops, problem 2 , where to get the bolt ? how the bolt called? does it have mb part number???


where in colomia where you in 77

thanx for the info
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  #3  
Old 05-03-2003, 09:36 PM
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Join Date: Jul 2002
Location: S. Texas
Posts: 1,237
You need a tool called an 'Easy-out". It looks like a drill bit but is tapered and the spirals twist around the the left instead of the right like a drill. There are many sizes so you will need to measure the hole in the bolt and match the hole size to the Easy-out size.

Be sure when you insert the Easy-out into the hole that it doesn't 'bottom' out, i.e., hit the bottom of the hole before it is in far enough to grab the sides of the bolt. If it does bottom out you will either have to go to a larger size or grind off the small end of the Easy-out. Drive the Easy-out in with a hammer until it is tight in the hole. Grab it with a pair of Vice Grips on the flat sides and twist it to the left. Generally things involved with the lubrication system aren't rusted in place and can often be removed easily.

If you are not comfortable doing this kind of mechanical work get a mechanic to do it. I see you are from Columbia. I spent 20 years traveling around the world, I was in Columbia in 1977, and have seen some of the wonders that mechanics in these countries can do. Ask the mechanic how he will get the bolt out first before you let him work on it. If he sounds like he really doesn't know, don't let him experiment on your car. Make sure he has good Easy-outs and not a bunch of broken stubs. If they are broken it means that he probably doesn't know how to use them.

Check also that the part inwhich the bolt is broken might be removable from the car. If it can be removed it will be much easier to repair than if you have to do the work on your back under the car.

Be careful if the mechanic talks about drilling out the bolt. Hollow bolts used in the oil system have very thin walls and it is easy to damage the threads in the bolt hole. If the threads are damaged too badly you may have to insert a 'Heli-coil'. This will restore the threads, but is a big hassle to install. You can live with some thread damage as long as you can tighten the bolt enough to make a good seal.

The seal on hollow bolts come from the two copper washers (be sure to replace them with new ones)on either side of the 'banjo' fitting and not from the threads.

Good luck.
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  #4  
Old 05-04-2003, 01:58 PM
djjeant
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ok im just going to take out the sls and try and get out the bolt but the bolt is very hard to find, my car is parked and im very sad, does anybody have info on that bolt, its hollow, bolt head is 13mm and it has 3 holes just bellow the head, its goes into the pump outlet and the fluid goes thru the bolt and into the high preassure hose, need info on the bolt to get a new one, i cant see any mb emblems on it or part number, please if youve got at least the name of the bolt or what kind of bolt it is post it , thanx
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  #5  
Old 05-04-2003, 09:01 PM
djjeant
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update on the bolt problem

ok heres where i am, i had to remove the sls front cover, the one with the hex bolts to acces the lower bolt, so i had to take off the radiator hose the fan and thfront cover of the pump to take out the pump, since the bolt is hollow, i cant drill it, so im stuck there, so for now i want to clean the pump, i was thinking to spray it with carb cleaner and then soak it in atf fluid, is this how i should clean it ?? when i put it back on im gonna have to seal it so i bought red rtv, where do i have to seal it??

thanx
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  #6  
Old 05-04-2003, 10:31 PM
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Join Date: Jul 2002
Location: S. Texas
Posts: 1,237
djjeant,

Did you read my post about using the easy out to remove the broken part of the bolt? There is NO NEED trying to drill out the broken part. It will only get you into trouble. You don't seem to be comfortable trying this kind of job so it might be better to get a qualified mechanic. The hollow core bolt is very common on European cars. There must be an auto salvage yard in your area that has a bolt that will fit.
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  #7  
Old 05-05-2003, 12:56 AM
djjeant
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the thread is to thin, the width beetewen the thread and the inner wall of the bolt is too thin so i dont think easy out will work i fear it will damage the the thread of the pump. tomorrow im taking the pump to several mechanics and hear what theyd do and choose the best one, and even though its gonna be harder and maybe not up to spec im gona have to have the bolt made, we dont have mercedes benz salvage yards or anykind of salvage yard except for maybe trucks, what about the cleaning technic, should atf be fine after i clean it or should i grease something, ATF is whats used in the sls pump and the pump was full of it all round i didnt see anything else, and im sure when i go back to the car ill figure out where to seal it, thakx kip youve been of great help, if you can, email me about youre trip to colombia id like to know more about it

djjeant@hotmail.com
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  #8  
Old 05-05-2003, 05:09 PM
djjeant
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hey kip it worked the easy out worked , the bolt went out lke butter thanx a lot , im still waiting for the bolt to be machined i couldnt find it.

thanx a lot kip
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