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Need Cam Gear Lock Tabs Help!


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Please help

I'm assembling my freshly rebuilt 1979 320i m10 and I do not have the locking tabs for the cam gear bolts. I have been searching everywhere and come up empty. Who ever assembled it the last time (I bought it as a core) didn't have them either, so reusing is out of the question.

Every bit of info I find on installing the cam sprocket or setting the timing says "don't forget the locking tabs" - No S##t!!! But where do you get new ones????

I have the single row sprocket, its held on with 4 bolts that seem evenly spaced.

Anyone know where I can pick a set of these up? I'm frustrated scouring the interweb....

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I'd rather stick with the BMW approach with lock plates.  Consider this.  Thread locking compounds have been around a long time but BMW liked to use lock plates on this application and I think because it has sever pulsing loads.  Yes BMW uses locking compound on the flywheel bolts but the loads must be tempered some due to the mass of the parts involved.  The S14 engine produced 20 years later still uses locking plates in this application.

The consequences are severe if these bolts come out.  I can see the chain locking up the crankshaft with possible rear wheel lockup.  Not a good deal.  Now I'm sure there will be stories stating thread lock worked fine for me for x years, you have been blessed.

A radiator shop is a good place to take a leak.


I have no idea what I'm doing but I know I'm really good at it.

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loctite is fine,


ive been building race m10 and s14 engines for over ten years and never had an issue, and were talking engines with full race cams and double valve springs, revving to over 8K, infact the s14s have been to 10k with missed gears, on one occasion we bent the exhaust valves, but the gears never slipped 

Edited by grahamb
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I think the same part is used to secure the fan blade, no time to check but very similar and alot less hazard  if the fan loosens

Happy Trails to u~ Dave Miller
76 Golf~Rhiannon~BM Mascot~*~97 328is~Silver Ghost~*~68 1600~Wisperin Beast~*~70-02~Bumble Beast~*~76 02~Beast~

Keep smilin all the way

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I think the same part is used to secure the fan blade, no time to check but very similar and alot less hazard  if the fan loosens


The fan bade tabs are a different length....


If there are tabs there and they aren't too worn they stay, but I always use Loctite in addition. If there are no lock plates I substitute new wave washers in place AND always use loctite, the red kind...

Tom Jones

BMW mechanic for over 25 years, BMWCCA since 1984
66 BMW16oo stored, 67 1600-2 lifelong project, 2 more 67-8 1600s, 86 528e 5sp 564k, 91 318i
Mom&Dad's, 65 1800TiSA, 70 2800, 72 2002Tii 2760007 orig owners, 03 325iT, 12 328iT

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Be careful if you do that- the original tabs are of a very hard material so that they don't pound out

from underneath the bolt and loosen.


You'd want some hard steel...  like shim stock or something.





"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

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