Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 924/944/968 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Apr 2017
Posts: 24
Camshaft bearing caps

Hey everyone,

I did the head gasket on my 1980 924. I was putting the camshaft back in and putting the bearing caps back in place and as I was tightening the nut it snapped in half.. I was definitely using my torque wrench. Anyways my issue is I can find any bearing caps to buy anywhere.. If you know where I can get some please let me know!!! I posted a picture of the broken cap.

Old 06-04-2017, 11:40 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
Pauld_94S2's Avatar
 
Join Date: Jul 2014
Posts: 395
Very bad news...........

The camshaft caps are mated to the head and location. You can't replace just the cap because it is line bored with the head so that it is in line with all the other caps. You will have to replace the head unless you can buy another cap and have it line bored.

Are you sure that cap is in the right place and oriented in the right direction (turned 180 degrees)?
I would not expect a cap to crack unless there is some misalignment in the cam or caps.

Also, you have to very evenly torque all of the caps and cap bolts in a pattern so that there isn't any pressure at any one cap. You can't just put the caps in place and start randomly tightening the cap bolts; you will break a cap or the camshaft.

Last edited by Pauld_94S2; 06-04-2017 at 12:28 PM..
Old 06-04-2017, 12:26 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
Join Date: Apr 2017
Posts: 24
Thank you for the reply! I looked in my manual and didn't see any sort of order that I was supposed to go in.. definitely will be more careful next time. Now I need to find myself a cap. Or try my best to find a head at a reasonable price.
Old 06-04-2017, 01:10 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered User
 
Join Date: Dec 2015
Location: Pound, VA
Posts: 994
Garage
The cam caps on any head are machined for that position only. You cannot mix them up or turn them 180 and there still be a perfect circle at the cam landing. When disassembling an engine, you should mark the cap position location and orientation if there are no indicators already on them. Sometimes you can get lucky and compare the mating surfaces where the bolts go through and see an outline of the corresponding mating surface. But like Paul says above, these things are bolted on during the machining process of manufacturing and line-bored in place to make it perfectly round. Once that happens, that cap can only be used in that position and that orientation for the duration of the life of the head. You're going to need another head because fixing that (while possible) is going to cost more than a decent used head.
__________________
87 944N/A since 1992
87 944S - Near Future Engine Project Car
88 944S - Current Project
84 928S - Restoration Project
Old 06-04-2017, 02:52 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
Join Date: Apr 2017
Posts: 24
So the caps and a camshaft come with a new head? Or maybe just the caps? I am debating on buying it from Porsche since it is only 500$.
Old 06-04-2017, 03:13 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered
 
Join Date: Apr 2010
Location: Arizona
Posts: 2,947
Garage
The 924 head (047103353A, 047103353B, 047103353C) only comes with a stopper plug (056103379) and the 10 studs that hold the caps (056103397) as well as the caps. The caps are not something that could be sold individually.

The only head that's still available is 047103353C and you'll probably have to wait a few weeks to get it from Germany. I just bought 2 new heads for my 912E and it took about 25 days to get them.

You'll have to transfer over the cam as wall as the valves, springs, lifters, etc as well as adjust the valves.

Good luck,
Jackson

Edit: it'll also be covered in a life-sucking cosmoline. Don't even try to clean it yourself, take it to a machine shop and have them do it.



Last edited by Jrboulder; 06-04-2017 at 05:29 PM..
Old 06-04-2017, 05:04 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered User
 
Join Date: Dec 2015
Location: Pound, VA
Posts: 994
Garage
A soak in some mineral spirits, acetone, or lacquer thinner, and the cosmoline will dissolve away. ;-)
__________________
87 944N/A since 1992
87 944S - Near Future Engine Project Car
88 944S - Current Project
84 928S - Restoration Project
Old 06-05-2017, 10:25 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
Join Date: Jun 2008
Location: Ontario, Canada
Posts: 2,145
Quote:
Originally Posted by 924Alex924 View Post
So the caps and a camshaft come with a new head? Or maybe just the caps? I am debating on buying it from Porsche since it is only 500$.
Given that the car is $500, how much damage could you do running with the wrong cap??
Old 06-05-2017, 10:33 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered User
 
Join Date: Apr 2017
Posts: 24
Harsh.. But very great question. Lol
Old 06-05-2017, 10:39 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Registered
 
Join Date: Oct 2002
Location: Boulder, CO
Posts: 846
Yes on a $500 car I'd get caps from a scrap head and see if any of them fit OK without locking the cam up and then rip it. If you can get a scrap cam or some non-performance grind no one wants you can probably use it to lap that cam journal and cam cap with some grinding paste. Then clean up and put the Porsche cam in.

I suppose caps from other VAG engines from this family might fit (Jetta, Audi Fox, Audi 80, etc.)

__________________
1987 928S4
1992 968 cabrio
1994 968 cabrio - Supercharged
Old 06-05-2017, 12:11 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 09:51 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2020 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.