Oil Leak

7 posts / 0 new
Last post
Talisman
Offline
Joined: 12/26/07
Posts: 246
Oil Leak

I just noticed what looks like an oil leak around the junction of the cylinder head cover and the engine block.  My first inclination is to tighten the bolts holding it.  Anyone know the recommended York on these? I'm suspect there is one.  If that fails I would probably need to remove it and replace the gasket.  It looks easy.  Am I missing something?

Enrique
Talisman 1998 MK2 36' hull #1673 M35B Engine
on the hard in South Glastonburry, CT

Enrique
Talisman
1998 36 MK2 Hull #1673
Tall Rig Wing Keel
M35BC engine
Old Saybrook, CT Summer
South Glastonbury, CT Winter
 

MitchMan406's picture
MitchMan406
Offline
Joined: 12/31/11
Posts: 71

When you write "cylinder head cover," do you mean the valve cover?

See pic...

Mitch

1986 Catalina 36 MKI 
S/V "Blessing"
Kema, TX
Hull: #584
M25 w/ Oberdorfer Conversion
 

Attachments
MitchMan406's picture
MitchMan406
Offline
Joined: 12/31/11
Posts: 71

This may help you regardless:

I found this info in the Members' Technical area under "Manuals."

See pic attached; it may have the torque data you wanted.

Mitch

1986 Catalina 36 MKI 
S/V "Blessing"
Kema, TX
Hull: #584
M25 w/ Oberdorfer Conversion
 

Attachments
newguy's picture
newguy
Offline
Joined: 8/1/11
Posts: 408

Agree with MitchMan as to ensuring it's the cylinder head vs. the valve cover.  Much more likely to be the valve cover.  Replacing the valve cover gasket and tightening is easy.  Not true with messing with the cylinder head bolts.  If it's the cylinder head bolts that need messing with, then page 43 and 44 here:  http://www.westerbeke.com/OnlineManuals/200554_M-25XPB_M35B_M40B_Technic...

Shows loosening sequence, tightening steps, tightening sequence, and final torque.  A leaking head gasket is frequently accompanied by exhaust blow-by and water seepage as well.

Nick Caballero
Retired C36/375IA Mk II Technical Editor

Talisman
Offline
Joined: 12/26/07
Posts: 246

It's valve cover.  What did you mean by exhaust blow by and water seepage?  Thanks for manual reference.  I didn't see that.

enrique

Enrique
Talisman
1998 36 MK2 Hull #1673
Tall Rig Wing Keel
M35BC engine
Old Saybrook, CT Summer
South Glastonbury, CT Winter
 

newguy's picture
newguy
Offline
Joined: 8/1/11
Posts: 408

The valve cover gasket only seals oil from leaking on the engine and making a mess.  Since this is where you indicate the problem is, then the pages from the manual that I referenced above are not appropriate.  The head gasket has a much more complicated job as it seals all of the liquid  passages between the cylinder and head (oil and cooling water) and as well as provides a gas barrier for each cylinder.  When this gasket is not compressed properly or "blown" you can get a multitude of symptoms,  Water seepage is really coolant seepage and exhaust blow-by is really combustion gasses that make it past the part of the gasket that encompasses each cylinder.

Nick Caballero
Retired C36/375IA Mk II Technical Editor

Talisman
Offline
Joined: 12/26/07
Posts: 246

Thanks to all

Enrique
Talisman
1998 36 MK2 Hull #1673
Tall Rig Wing Keel
M35BC engine
Old Saybrook, CT Summer
South Glastonbury, CT Winter
 

Log in or register to post comments