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Pod1 12-23-2021 01:50 AM

Cam bearing cap 3
 
1 Attachment(s)
Hi,
I’ve gone and broke the bearing cap on the third journal on the camshaft buy fitting it the wrong way around then tightening it. Does anyone have a spare? The cars scrap without one. TIA. Paul. (I’ve pushed it together in the photo but u can see the crack. It’s in two halves. ��

Pic attached.

Attachment 1898Attachment 1898

jpliddy 12-24-2021 09:51 AM

cam shaft bracket?
 
is that the bracket that holds the camshaft down if so i know some one with my 1995 d24 which had a broken camshaft think the brackets were all intact
he had the engine off me

jpliddy 12-24-2021 09:52 AM

im based in stoke on trent

v8volvo 12-24-2021 08:00 PM

Very sorry to hear, this is a real bummer. This is something that we have seen happen from time to time, somewhat easy mistake to make, as the caps are directional and bored offset requiring correct reinstallation position, but they are not marked clearly from the factory. So accidental reinstallation the wrong way and resulting damage is somewhat common.

Here is the bad news sadly. The camshaft bearings are machined into the head with the caps installed and thus the cap is part of the head's machined manufacturing process. Therefore you cannot just replace the cap with another one off a different head. Doing that will result in a mismatch of the top and bottom halves of the cam bearing as the replacement cap will not be compatible with the head it's bolted to. That will result in loss of oil pressure, damage to cam and head, etc. This would be much like trying to replace a connecting rod cap with one from a different rod, or a crankshaft main bearing cap, etc. They are integral to the component in question, part of the manufacturing process, and not able to be thought of as interchangeable off-the-shelf parts, like a water pump or a fuel injector would be, unfortunately.

That said, there are still options. You CAN replace the cam cap with one off another head IF you have the head line-bored by a machinist afterwards to ensure correct fit and running clearance with the camshaft. Common enough procedure that most any machine shop should be able to handle. Or, you can also replace the head with a good used or new one. Maybe your headgasket could use a refresh after all these years anyway, or the head use a valve job. :) Brand new AMC heads are very high quality, fully loaded with new cam/valves/guides/etc, and quite affordable. As I understand it they are fairly easily available in Europe -- look on ebay, etc. This could be a great option to fix the issue while also giving your engine a nice update that renews a lot of wear items.

Unfortunately all of the viable repair options mean removing the head from the engine. That is not such a big deal though -- main effort is working with the timing belts upon reassembly, and I am guessing if you have cam bearing caps off that probably means you had the camshaft out, thus you're doing all of that already as it is. Yes? :)

Hope we can help you keep it on the road, don't throw in the towel, it's a pain and unlucky for sure, but a solvable problem that gives you some opportunities to do other freshening.

Pod1 01-06-2022 11:09 AM

Hi,
I didnít realise I wouldnít be notified of replyís to my post. Many apologies. Thanks for the helpful responses. I understand what you say about the cap being unique to the head but as I donít have much option at the moment I guess Iíd hope on VWís tight manufacturing tolerances and give one a go. Maybe it wouldnít fit perfectly and be a little tight or out but Iíd just have to machine it a little to allow fitment. Unless itís massively oversized I canít see too much oil pressure loss and I maybe able to offer it up tie tie broken original to try to enable fitting. If anyone had a spare Iíd like to try as my options are this, welding the old one or scrapping the vehicle.


Many Thanks,

Paul

07974424869

Pod1 01-06-2022 11:14 AM

Thanks v8volvo. The condition of this old workhorse is that removing the head would be an option if like you say the cam bearing cap was miles out. If the gentleman from stoke sees this could you get in touch? I would like to get hold of that spare cap asap

Thanks.

Pod1 01-09-2022 01:39 AM

Correction to mobile number:
07974 423869

v8volvo 01-09-2022 09:36 PM

You may want to edit your posts to shield your phone number from spam robots who might like to have it. :p

If you don't hear back from jpliddy in short order, send me a PM -- I believe his email address has been offered on here before and maybe that will be a faster way to reach him, I will try to find it and send to you.

Hope you all can work something out! :)


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