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Head Gasket Leak CA72.

LOUD MOUSE
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Post by LOUD MOUSE » Sun Jan 25, 2015 10:03 am

We have discussed this and he will check the cover when he gets a chance. ..................lm
G-Man wrote:I agree. The leak is above the head gasket said unlikely to be from there. Either the cam cover or the dreaded separation of the combustion chamber "skull" from the head casting.

If the former, should be an easy fix.

G

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G-Man
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Post by G-Man » Sun Jan 25, 2015 1:00 pm

Sounds good, LM. I'm sure he will pleased to get this sorted and start enjoying the motorbike.
LOUD MOUSE wrote:We have discussed this and he will check the cover when he gets a chance. ..................lm
G-Man wrote:I agree. The leak is above the head gasket said unlikely to be from there. Either the cam cover or the dreaded separation of the combustion chamber "skull" from the head casting.

If the former, should be an easy fix.

G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

LOUD MOUSE
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Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Sun Jan 25, 2015 2:38 pm

Here 's hoping I'm right!. ..........lm
G-Man wrote:Sounds good, LM. I'm sure he will pleased to get this sorted and start enjoying the motorbike.
LOUD MOUSE wrote:We have discussed this and he will check the cover when he gets a chance. ..................lm
G-Man wrote:I agree. The leak is above the head gasket said unlikely to be from there. Either the cam cover or the dreaded separation of the combustion chamber "skull" from the head casting.

If the former, should be an easy fix.

G

deafanddiabetic
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Location: Nebraska

Post by deafanddiabetic » Sun Jan 25, 2015 5:56 pm

I think that was the trick, Ed.

I didn't find any evidence of the cam being off centered and in need of a good hammer, but the new screws I put in just weren't quite long enough because there's no threading the first 1/4" into the holes in the head, so they weren't tight against anything. I put in longer bolts and cleaned up the surfaces for those new gaskets. I did notice that one of the gaskets has a "cutout" that the other one does not. It's on the bottom of the gasket and only on one side, since there's oil passages on both I wasn't sure where that gasket should go, but I put it on so it wasn't facing the exhaust (in case it wanted to leak again).

I took it around the block and it's leak free on both sides.

It does shift though, it was just a hard shift and after adjusting the clutch correctly I can move it through all of the gears alright. Front brake barely grabs anything, but I'll worry about that another time.

LOUD MOUSE
honda305.com Member
Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Sun Jan 25, 2015 6:59 pm

Good deal.
I'll cross my fingers and hope the leak is gone. ......................lm
deafanddiabetic wrote:I think that was the trick, Ed.

I didn't find any evidence of the cam being off centered and in need of a good hammer, but the new screws I put in just weren't quite long enough because there's no threading the first 1/4" into the holes in the head, so they weren't tight against anything. I put in longer bolts and cleaned up the surfaces for those new gaskets. I did notice that one of the gaskets has a "cutout" that the other one does not. It's on the bottom of the gasket and only on one side, since there's oil passages on both I wasn't sure where that gasket should go, but I put it on so it wasn't facing the exhaust (in case it wanted to leak again).

I took it around the block and it's leak free on both sides.

It does shift though, it was just a hard shift and after adjusting the clutch correctly I can move it through all of the gears alright. Front brake barely grabs anything, but I'll worry about that another time.

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Waveblaster
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Location: Perth Western Australia

Post by Waveblaster » Sun Jan 25, 2015 9:12 pm

Happy Days

Perseverance and help from LM pays off!

enjoy the bike

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G-Man
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Post by G-Man » Tue Jan 27, 2015 5:31 pm

I agree. The leak is above the head gasket said unlikely to be from there. Either the cam cover or the dreaded separation of the combustion chamber "skull" from the head casting.

If the former, should be an easy fix.

G
'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

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