Are these chain cover surfaces clean enough?
#19
Rennlist Member
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Also, I 'double nutted' the cover bolts (pardon the pun here) when I installed them with a small bit of blue lock tite. I noticed a few studs were not that tight when I disassembled them. I guess cheap insurance. No leaks so far after 18months! Good luck with your project. Fixing leaks are so satisfying to me
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#20
Seared
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I've replaced timing chain cover gaskets on my junker and a few other 993s. In each case I fastidiously cleaned the groove (wooden chopsticks work great...) and used razor blades, etc. to clean the housing surface. Then Curil-T on both sides of the gasket and on the donuts for good measure. No weeping/moisture/drips afterwards.
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/ED1D849B-5281-464D-80C1-C865DBD2CFC6_zpsltakaujt.jpg)
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/91A05262-1887-4A9C-9CDC-59D54E657DB8_zpsc7eul291.jpg)
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/6B1EF445-E85A-4B69-B14D-F99CD2F09BC6_zpsa9vqn0h5.jpg)
Andreas
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/ED1D849B-5281-464D-80C1-C865DBD2CFC6_zpsltakaujt.jpg)
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/91A05262-1887-4A9C-9CDC-59D54E657DB8_zpsc7eul291.jpg)
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/6B1EF445-E85A-4B69-B14D-F99CD2F09BC6_zpsa9vqn0h5.jpg)
Andreas
#21
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The covers appear to have some sort of light anodized black finish when new that turns greyish over time. I washed my housing in a varsol bin and all the "blackness" quickly rinsed off as if it were dirt leaving me with a patchy raw olive-coloured finish. I decided to bead blast the exterior of the housings after an hour of masking the rest off. Not sure what I am going to do with these just yet (probably high-temp paint)
Last week I had the chance to buy some used housings that where caked in gunk and oil which appears to have preserved them and their black finish. I dry-wiped them with a shop towel to scrap the big crud off. My next step will be to clean them in soapy hot water as solvents appear to strip the black finish (did a test with brake cleaner: too strong). If this works out I will install them as is.
Last week I had the chance to buy some used housings that where caked in gunk and oil which appears to have preserved them and their black finish. I dry-wiped them with a shop towel to scrap the big crud off. My next step will be to clean them in soapy hot water as solvents appear to strip the black finish (did a test with brake cleaner: too strong). If this works out I will install them as is.
#22
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I've replaced timing chain cover gaskets on my junker and a few other 993s. In each case I fastidiously cleaned the groove (wooden chopsticks work great...) and used razor blades, etc. to clean the housing surface. Then Curil-T on both sides of the gasket and on the donuts for good measure. No weeping/moisture/drips afterwards.
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/ED1D849B-5281-464D-80C1-C865DBD2CFC6_zpsltakaujt.jpg)
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/91A05262-1887-4A9C-9CDC-59D54E657DB8_zpsc7eul291.jpg)
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/6B1EF445-E85A-4B69-B14D-F99CD2F09BC6_zpsa9vqn0h5.jpg)
Andreas
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/ED1D849B-5281-464D-80C1-C865DBD2CFC6_zpsltakaujt.jpg)
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/91A05262-1887-4A9C-9CDC-59D54E657DB8_zpsc7eul291.jpg)
![](http://img.photobucket.com/albums/v452/aowalter/Porsche%20parts/6B1EF445-E85A-4B69-B14D-F99CD2F09BC6_zpsa9vqn0h5.jpg)
Andreas
![rockon](https://rennlist.com/forums/graemlins/rockon.gif)