I am in the middle of replacing timing chain guides and the bolts on the left side exhaust cam will not come out. I have used several different T30 bits from snap on to Mac to Gearwrench and all slip. I have tried heating them still no luck. Has anyone had to drill out the bolts and any advise would be appreciated.
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Exhaust cam sprocket bolts stuck
- Thread starter Black 034
- Start date
Wow. I've never heard of this before. Can you apply heat from the back side? I wonder if the bolts were removed in the past and someone used threadlock. Hopefully you do not have to drill them.
Well shoot. Have you tried a T35 driver? I can't recall if these are T30 or T35. My notes indicate T35.
If you do have to drill... good news is, replacement bolts appear to still be available. Bad news is, they are now 10x the price from a few years back. $28 MSRP each now!!! The later T40 bolt will not fit, there's an error in the FSM.
www.autohauspartsdelivered.com
If you do have to drill... good news is, replacement bolts appear to still be available. Bad news is, they are now 10x the price from a few years back. $28 MSRP each now!!! The later T40 bolt will not fit, there's an error in the FSM.
Genuine Screw for 104-990-00-22 | Autohaus Parts Delivered
Find the right Screw for your 104-990-00-22. Not sure what you need? Use our VIN number search tool to find everything you need in one spot.
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When I rebuilt the engine on my former E320 wagon in Houston, I could not loosen ANY of the Torx cam cap bolts on that M104.
I brought the entire cylinder head into the machine shop, both cams still installed, and they were (eventually) able to loosen all of the bolts. A number of them even THEY were unable to remove by normal means, so they actually had to WELD nuts to the tops of the cam bolts so that they could get a stronger purchase on the bolts to remove them.
I brought the entire cylinder head into the machine shop, both cams still installed, and they were (eventually) able to loosen all of the bolts. A number of them even THEY were unable to remove by normal means, so they actually had to WELD nuts to the tops of the cam bolts so that they could get a stronger purchase on the bolts to remove them.
Can you get something like this bolt extractor around it? This has worked for me in the past for stripped cap-heads.
I've already drilled them out no big deal. I have a great hardware store that if they don't have it you don't need it. They carry a great assortment of metric bolts 8.8,10.9 and 12.9. Not sure what the factory bolts are, but they drilled out pretty easliy with a sharp bit. If anyone knows the specs that would be great. Do you use blue loctite on these bolts it does appear there was any type of thread locker.
