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Old 26 July 2010, 06:59   #1
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Clamshell crank cover liquid gasket

Well, the reassembly has halted temporarily as I have discovered a three way puzzle!

My Clamshell is covered by 2 editions of a Marner Clymer (one bought for my old Yam, the '75-'81 copy, the other bought for the Merc I thought I had bought before discovering the engine was older than the livery on the case implied - the '82-90 copy).

So, the two clymers disagree as to where the liquid gasket goes, and to confound maters further, neither match where I cleaned the old liquid gasket off the sealing surfaces on dissassembly!


So, any of you Merc genii know where this squezy gasket actually goes, and the quantities I need? I have everything frrm a continuous 1/8" bead taking a meandering tour round the entire joint to a "small amount" at the point where the cork seal meets the bearing carriers.
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Old 26 July 2010, 11:47   #2
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if you want to ring me with a fax number i will fax the diagram of the bead of loctite 514 quoting from the factory service manual pn 90-861355 chapter4A-24
a continuous bead 1/16" or 1.6mm thick behind the crankcase bolt holes (that is between the bolt holes and the inside of the crankcase)
i hope this helps
regards
uncle al
phone 01869 326411
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Old 26 July 2010, 12:07   #3
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as in attached


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Old 26 July 2010, 12:31   #4
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Cheers guys,

Al,
That certainly agrees with the '75-81 Clymer, however It's certainly not what I cleaned the remains of off when I took it to bits. What you describe sounds pretty much where the cork seal strip runs. '82-90 Clymer implies a reasonable blob around the ends of the cork, but the way the diagram is drawn, it implies it's asymetric! (i.e inside on the R and outside on the L....)


T 15,

I have the 3 cyl lump, but thanks anyway, help always appreciated.
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Old 26 July 2010, 14:10   #5
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go with the picture from T15 same as my manual good luck
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Old 27 July 2010, 03:33   #6
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?????? but that's the 4 cyl! I have a 3-pot with a cork sealing gasket strip in a groove.......
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Old 27 July 2010, 04:02   #7
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it is the same as a three cylinder
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Old 27 July 2010, 04:15   #8
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Quote:
Originally Posted by 9D280 View Post
?????? but that's the 4 cyl! I have a 3-pot with a cork sealing gasket strip in a groove.......

the manual covers 45 & 50 4cyl and 50,60 & 70 3cyl, so I would assume a "standard" photo/diagram in a section will apply to all models, ( I would go with uncle al )

( my manual is the same as uncle al, Mariner/Mercury 90-86135-5 )
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Old 27 July 2010, 04:20   #9
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but mine has a groove in the cover that takes a cork seal strip,that runs outside the bolts.

When I disassembled, there was no sealant debris inboard of the bolts, and if I ran a bead as described (or a variation of it) there is a high chance I'd block the CCV holes.


As I have never managed to get a link to the Ishop microfices to work (to bung a pic up) , I have a cylinder block similar to that found on the microfiche for serial numbers 9469200 THRU 9683054
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Old 27 July 2010, 08:14   #10
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Quote:
Originally Posted by 9D280 View Post
but mine has a groove in the cover that takes a cork seal strip,that runs outside the bolts.

When I disassembled, there was no sealant debris inboard of the bolts, and if I ran a bead as described (or a variation of it) there is a high chance I'd block the CCV holes.


As I have never managed to get a link to the Ishop microfices to work (to bung a pic up) , I have a cylinder block similar to that found on the microfiche for serial numbers 9469200 THRU 9683054

what is your Serial No ?

what year is ur engine ?


another manual, Clymer > 1989, that I have, shows it as "our" post before & as the page I posted BUT in an older Merc Manual > 1978, it shows as you explain: with a strip gasket inset into the cast which is then coated with Permatex 2c-12 sealer, will post pic soon.
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