hidden_hunter Posted January 14, 2018 Share Posted January 14, 2018 (edited) Hi all, I thought I was getting close to getting my 1922 Cadillac but alas no. I had most of it back together but when I went to put on the chains I couldn’t get more than half a turn out of the chain adjuster before it goes tight when the book tells me that I should turn it clockwise 6 times. So I’ve had to take most of it apart again It moves freely about 1/2 a turn on the adjuster shaft and the locking screw is out I can see the bottom worm gear moving but the top gear refuses to move. This should rotate to allow you to tension or back off the chains The camshaft moves freely itself and slides backwards and forward about 1/2” I can’t see any physical obstructions or any reason why the gear shouldn’t rotate I’ve applied a liberal amount of WD40 with no luck, neither of the gears will move (the book says loosen the back one first but neither are moving despite the worm gear) Edited January 14, 2018 by hidden_hunter (see edit history) Link to comment Share on other sites More sharing options...
hidden_hunter Posted January 14, 2018 Author Share Posted January 14, 2018 Video of it turning (don’t mind the wd40) 6D449A14-4B03-49F5-AAD9-808C0CFF95BA.MOV Link to comment Share on other sites More sharing options...
hidden_hunter Posted January 17, 2018 Author Share Posted January 17, 2018 Any ideas? I’ve tried everything I can think of and have to be able to move the gear to reassemble the motor Link to comment Share on other sites More sharing options...
hidden_hunter Posted January 18, 2018 Author Share Posted January 18, 2018 I've scanned copies of the shop manual as well, I can't see anything that would possibly be stopping it Scan_20180117 (3).pdf Scan_20180117 (4).pdf Scan_20180117 (2).pdf Scan_20180117.pdf Link to comment Share on other sites More sharing options...
Bush Mechanic Posted January 18, 2018 Share Posted January 18, 2018 My sympathies. You are not having a lot of fun with your Cadillac. I have no experience with these motors, so cannot be of much help. So sleeve H is an integral part of locking gear A, and sleeve H has seized onto carrier C? Or conversely gear A has seized against the locking surfaces in the block casting. (Or both). And the cam runs in a bush supported by carrier C. And the assembly cannot be removed for freeing up, unless sleeve H/gear A are rotated in the block, unlocking the camming effect. Tricky place to be waving the gas torch around in, as well. Hardened sleeves, etc. The block looks to be alloy, too. Not an easy one to put on the stove for a good boiling, either! And I'm always wary of subjecting blocks to shock loads. The teeth on gear A look like they would take a few light taps using a bronze drift, though. Hopefully a Cadillac man will chime in, now that your problem is more obvious from the workshop manual. Good luck with it, Mick. Link to comment Share on other sites More sharing options...
edinmass Posted January 18, 2018 Share Posted January 18, 2018 Ivan on this forum is familiar with them, keep the heading towards the top and I’m sure he will answer. Putting it in the Cadillac section and HCCA section would not hurt either. Link to comment Share on other sites More sharing options...
Turbine Tech Posted January 20, 2018 Share Posted January 20, 2018 Can't help to say the picture of the cam bearing area looks like the bearing bore is cracked on the right side. Link to comment Share on other sites More sharing options...
hidden_hunter Posted January 20, 2018 Author Share Posted January 20, 2018 6 hours ago, Turbine Tech said: Can't help to say the picture of the cam bearing area looks like the bearing bore is cracked on the right side. We think that might have happened when the top cover disintegrated and bits of metal went flying through the motor However, we had success today - the old man tapped it back and forth for a while and eventually it freed up. Now both the lock and tensioner are moving easily and both gears are turning. Ive got the top cover back on and 12 of the valves so back on track 2 Link to comment Share on other sites More sharing options...
Turbine Tech Posted January 20, 2018 Share Posted January 20, 2018 Good to hear good news . Sometimes casting flash looks like a crack. Link to comment Share on other sites More sharing options...
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