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jensen541
Joined: 03 Dec 2007 Posts: 56
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Posted: Mon Jan 19, 2009 5:52 pm Post subject: Core Plug Sealant |
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Evening
I have removed the core plugs from the Jensen block as it seemed prudent with the engine was out and one section between plugs was completely blocked, so I'm glad I did. There seemed to be some type of core plug sealant in there, looked like silicone to me. Is that correct or is there something better?
Also I will be replacing both crank and rod bearings. I know there is a thread further down regarding grease (thought that covered wheel bearings?) but what would to blokes suggest be better, graphite grease or lithium for the these bearings?
Ta |
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peter scott
Joined: 18 Dec 2007 Posts: 7120 Location: Edinburgh
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Posted: Mon Jan 19, 2009 6:19 pm Post subject: |
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I would recommend a little "Hylomar" around your core plugs prior to fitting.
I'm confused by your bearings reference. If you are asking about fitting the main and big-ends then the backs of the shells and the housings should be completely clean and dry without any lubricant or sealant but you should smear the bearing surfaces and crank journals with good quality engine oil. I would recommend fully synthetic because it will be sure to remain on the surfaces. Don't use grease.
Peter _________________ http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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jensen541
Joined: 03 Dec 2007 Posts: 56
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Posted: Mon Jan 19, 2009 6:50 pm Post subject: |
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Well now I'm confused as well Peter!
Chatting to a bloke today who recommended packing 'can't use too much' of something called 'Graphaline' or something like that. Which I took to mean some sort of graphite substance.
I will bow to your knowledge on this though.
Thanks Brian |
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emmerson
Joined: 30 Sep 2008 Posts: 1268 Location: South East Wales
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Posted: Mon Jan 19, 2009 10:00 pm Post subject: |
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Oil is what the bearings were designed to run in, so that would be best.
Grease could just block an oilway for that few vital seconds on start-up. |
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wrinx
Joined: 22 Jun 2008 Posts: 142 Location: Derbyshire
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Posted: Tue Jan 20, 2009 9:14 am Post subject: |
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Perhaps the chap was referring to engine rebuild grease/assembly grease?
wrinx _________________ www.alfaromeo155.co.uk | www.alfamatta.co.uk
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peter scott
Joined: 18 Dec 2007 Posts: 7120 Location: Edinburgh
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Posted: Tue Jan 20, 2009 10:59 am Post subject: |
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I can't see any connection between shell bearings and grease though.
Peter _________________ http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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Jonv8
Joined: 28 Jan 2009 Posts: 66
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Posted: Sat Jan 31, 2009 9:52 pm Post subject: |
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The product is called Graphogen - think thats the correct spelling.I used to use it on shell bearings in engines that I was assembling for a local reconditioner,the theory was that it would sit inthe bearing for ages incase the engine was not used immediately after the build.Also used it on cam lobes - esp good for v8's etc that relied on drainback from the valvegear to lube the cam/followers.
If anyone is after some I'll check on the box for contact details - there is still a box sitting in my toolbox. |
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PAUL BEAUMONT
Joined: 27 Nov 2007 Posts: 1281 Location: Barnsley S. Yorks
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Posted: Mon Feb 02, 2009 1:53 pm Post subject: |
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I'm pretty sure that you are correct Jonv8. I also use Graphogen for the same purpose. Got a tube of the stuff on my shelf at home - but that's 50 miles away just now!!
PAUL |
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jensen541
Joined: 03 Dec 2007 Posts: 56
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Posted: Fri Feb 13, 2009 9:18 pm Post subject: |
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Thanks Paul & Jon
I now have my very own tube!
Brian |
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