|
|
|
04-28-2019, 01:29 PM | #1 |
Private
47
Rep 57
Posts |
Help! Broken N54 Valve Cover Bolt Extraction
My torque wrench failed me and broke off one of the bolts. There is not much head room for me to clamp the bolt out.
The bolt is easily accessible, but I have been trying to use 1/8 drill to drill the bolt, but the lack of precision and moving around makes it very scary (don't want to destroy the engine block). I've been searching around- mostly found concrete answers for the aluminum bolts on the N52. Any ideas and suggestions? Thanks! |
04-28-2019, 09:54 PM | #2 |
Lieutenant Colonel
2708
Rep 1,916
Posts |
Years ago snapped a bolt replacing my water pump on a 5.0 Fox body. My buddy welded a bolt onto the broken bolt and extracted it. That was a steel bolt and block but maybe you can get a good TIG guy to work some Al magic. Good luck
__________________
__________________
"The Constitution was never construed to authorize Congress to infringe the just liberty of the press, or the rights of conscience; or to prevent the people of the United States, who are peaceable citizens, from keeping their own arms.” Samuel Adams |
Appreciate
0
|
04-28-2019, 11:23 PM | #3 |
Brigadier General
1496
Rep 3,148
Posts |
There's a few different techniques that could be used
Use a sharp punch and punch the surface of the screw near the edge at a shallow angle, to try and reverse the screw out. Ive done this with snapped oil pan bolts before Centre punch the hole and try to drill a small hole in there, then once the hole is started run a screw extractor on it. (Alloy screws only) Drill hole into the screw then hammer in a torx socket in the hole, then use a ratchet to back out the screw
__________________
|
Appreciate
0
|
04-28-2019, 11:30 PM | #4 |
*Rollin 3rd*
106
Rep 1,232
Posts |
Not my video but this is how I extract called a punch I believe. I usually do the second way smacking a good size torx bit and working it out slowly if I don't have space. Start with method one if you have space move to torx bit if it doesn't work out. Worst case scenario heli coil. Hardest part is getting the gumps to get a drill near the head but once you're over it you realize its just another repair. Hope this helps. |
Appreciate
0
|
04-29-2019, 09:00 AM | #5 |
Major
821
Rep 1,015
Posts |
In that situation I like the punch idea followed by a small drill bit and then a screw extractor. You might even use a hand drill to start the hole. It should be fairly easy to get out since you just had it out. Have someone stand next to you with a vacuum while you drill and take up any filings as they are produced.
|
Appreciate
0
|
04-29-2019, 11:26 AM | #6 |
Lieutenant
246
Rep 439
Posts |
Ah a lucky one. I would recommend the left hand drill bits if you can find them.
__________________
2008 SGM 128i - 3 Stage IM - 130i Tune - Dinan Camber Plates - BMW PE - Injen Intake - 1M Mirrors - LCI Blacklines - M4 Spoiler - Blacked 263's - Aero Bumper - Aero Side Skirts - OMGSplitter - AFE Intake Scoops
|
Appreciate
0
|
05-03-2019, 09:46 AM | #8 |
Boost Addict
335
Rep 1,245
Posts |
I did this same thing exactly. Got it out using a sharpened screw driver and a ball peen hammer, took me about 30 seconds.
https://www.1addicts.com/forums/show....php?t=1493684 |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|