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-   -   Oil leak from valve cover (https://www.cruisersforum.com/forums/f54/oil-leak-from-valve-cover-224065.html)

Dasvt 22-09-2019 10:06

Re: Oil leak from valve cover
 
Uses some black napa form a gasket you dont need a gasket at all with that stuff and the can is useful in an emergency if you have to seal anything on the boat

Compass790 22-09-2019 14:51

Re: Oil leak from valve cover
 
[QUOTE=skipmac;2981881]Unfortunately I'm on an island with limited options for buying stuff unless I do mail order which takes at least 4-5 days and I really want to get this done. The red Permatex I have is very thick, gooey and certainly like glue in that it works as an adhesive. Also very good gap filling. The biggest concern is it is a pretty good adhesive so getting the cover off again may be a bit of a fight, involving bloody knuckles and a number of words that I would not repeat around the grandkids. But I'm saying this to the 5200 guy so maybe moot. :biggrin:

One method to get around the sticking is to oil the head face before you put it on, tighten 1/2 way as i mentioned earlier & then torque the final amount after its cured. You are then relying on the pressure on the mating surface rather than the adhesion
But I dont know if I'd oil in your case as joint sounds a bit problematic. I dont find silicone joints too hard to get apart but I usually only put silicone on one face & let it go off before bolting up.
You should be able to cut thru the silicone with a long box cutter type blade if you have a nice thick layer. ( I'd recommend a thick layer )
Gave up on limey engines long ago though, having said that our yanmar is based on a Limey design. They just forgot to include the leaks:biggrin:
If your rocker cover is flat I'm surprised it giving issues.
Sorry cant help on ft/lbs, it's a feel thing for me but to the point just short of distortion.
Please post back what happens. We are rootn 4 ya.

model 10 22-09-2019 15:47

Re: Oil leak from valve cover
 
The torque on those top rubbers is such that a new rubber will squish out to just a tick past the edge of the washer.

a64pilot 22-09-2019 16:13

Oil leak from valve cover
 
Not sure it helps but GM Vortec engineís seem to have center line bolts for their valve covers, torque spec 106 inlbs
LS series engines (the new smallblock) arenít center line bolts, but the torque spec is 106 inlbs.
Coincidentally or not, but oil pan 6mm bolts torque spec is 106 inlbs too.
106 is an odd number, Iím thinking it may translate to an even number of newton meters?

106 inlbs is close to 9 ftlbs, which seems a lot.

skipmac 22-09-2019 17:10

Re: Oil leak from valve cover
 
Quote:

Originally Posted by a64pilot (Post 2982100)
Not sure it helps but GM Vortec engineís seem to have center line bolts for their valve covers, torque spec 106 inlbs
LS series engines (the new smallblock) arenít center line bolts, but the torque spec is 106 inlbs.
Coincidentally or not, but oil pan 6mm bolts torque spec is 106 inlbs too.
106 is an odd number, Iím thinking it may translate to an even number of newton meters?

106 inlbs is close to 9 ftlbs, which seems a lot.


9 does sound like a lot and certainly a lot more than I was using.

skipmac 22-09-2019 17:30

Update
 
Here's the latest.


Friday I sealed the gasket to the valve cover and let it dry overnight. Saturday I took it to the boat, wiped the heads of excess oil, coated the mating surface with good layer of Permatex and bolted the cover on with a bit more torque than before.


Let that dry overnight and went back to the boat today to test and OH $#!%, literally. Some nasty seabird had moved on the boat and crapped EVERYWHERE. There was so much residue it could have been a small flock. So first job was to clean the deck off enough to get below without tracking the residue inside.


After I got that done (and stringing some monofilament around the boat to discourage a return) I checked the engine, cranked it up and it ran about 60 seconds and died. %$$^%#$@&!!!!! In the process of climbing around in the engine room I managed to shut the valve on the fuel filter and starved the engine and have to bleed the system.



By that time I had had enough and decided to go home and call it a day.



Ain't boating fun?

sailorboy1 22-09-2019 17:38

Re: Update
 
Quote:

Originally Posted by skipmac (Post 2982143)


By that time I had had enough and decided to go home and call it a day.



?

Quitter :facepalm:

a64pilot 22-09-2019 17:40

Oil leak from valve cover
 
Quote:

Originally Posted by skipmac (Post 2982130)
9 does sound like a lot and certainly a lot more than I was using.



Did to me too, but thatís for a 6mm bolt too. About the same size as a 1/4Ē bolt, a little larger.
I have a 30 to 150 inlb torque wrench for small stuff, 9 ftlbs may be tough to measure with a large torque wrench, but you could always use a fish scale on a regular wrench.

I assume engine manual is no help?

skipmac 22-09-2019 17:50

Re: Oil leak from valve cover
 
Quote:

Originally Posted by a64pilot (Post 2982154)
Did to me too, but thatís for a 6mm bolt too. About the same size as a 1/4Ē bolt, a little larger.
I have a 30 to 150 inlb torque wrench for small stuff, 9 ftlbs may be tough to measure with a large torque wrench, but you could always use a fish scale on a regular wrench.

I assume engine manual is no help?


Manual did not address the valve cover except I think to mention remove it to adjust the valves. :banghead:


And yes I used a small scale and a socket wrench. Probably not exact but close enough for government work.

skipmac 22-09-2019 17:51

Re: Update
 
Quote:

Originally Posted by sailorboy1 (Post 2982153)
Quitter :facepalm:


After all, tomorrow is another day. :wink:

Jim Cate 22-09-2019 18:27

Re: Update
 
Quote:

Originally Posted by skipmac (Post 2982160)
After all, tomorrow is another day. :wink:

Well, ya better hope so, or else there will be bird crap all over again!

Good luck with the leak..

Jim

Compass790 25-09-2019 17:39

Re: Oil leak from valve cover
 
Dying to know if you succeeded in" Mission, Barely, Possible" i.e. stopping a Pommy engine frm leakn oil??

skipmac 25-09-2019 18:25

Re: Oil leak from valve cover
 
Quote:

Originally Posted by Compass790 (Post 2984140)
Dying to know if you succeeded in" Mission, Barely, Possible" i.e. stopping a Pommy engine frm leakn oil??

Went out today and ran it for an hour and not a drop. I think it's cured but I'll have to use dynamite the next time I pull the cover off. :frown:



Now that's the big leak from the valve cover. Of course there's a few seeps and oozes here and there but I can live with those. After all, it's an old Pommy engine so it's to be expected.


Now if I can just figure out why it stalls out every time I switch to the port fuel tank. :banghead:

a64pilot 25-09-2019 18:30

Oil leak from valve cover
 
Quote:

Originally Posted by skipmac (Post 2982157)
And yes I used a small scale and a socket wrench. Probably not exact but close enough for government work.


You would be surprised how accurate it is, in fact the el cheapo deflecting beam torque wrench is among the most accurate and will hold calibration essentially forever, but you have to know how to use it, to keep the handle centered.
We assume that fancy electronic digital displayed things are more accurate, but often thatís not the case.

skipmac 25-09-2019 18:34

Re: Update
 
Quote:

Originally Posted by Jim Cate (Post 2982166)
Well, ya better hope so, or else there will be bird crap all over again!

Good luck with the leak..

Jim


Leak is looking good but the bird crap, damn cormorants.



After I cleaned the decks and cockpit and the bimini and the dodger I strung monofilament all around the rigging and over the cockpit. Kept them away for a couple of days but they found a hole and came back today. So more line around the boat and hope that slows them down again.

Compass790 25-09-2019 20:20

Re: Oil leak from valve cover
 
"Went out today and ran it for an hour and not a drop. I think it's cured but I'll have to use dynamite the next time I pull the cover off. "

It wont be as hard as you think IF the permatex is like the normal RTV silicone.
Hey but great you slew the dragon!

Cheechako 26-09-2019 09:30

Re: Oil leak from valve cover
 
ie: port fuel tank; engine dies. Maybe your vent on that tank is clogged? If you run it and it dies open the deck fill... vacuum there?

JPA Cate 26-09-2019 12:59

Re: Oil leak from valve cover
 
Cormorant fix:

What is done here seems to work. Take the monofil, and run a bit of it from a screw into the mast about 6" above the spreader out to the shroud. Do it for all your spreaders. Take one, from the mast to the backstay, and if necessary take some cable ties and use them on the pushpit and bow pulpit. Leave the ends sticking up. Make it so it's unpleasant for little flipper feet, and they have a hard time seeing them. Usually they'll select another boat for a perch.

And now, to the port fuel tank issue!

Ann

skipmac 26-09-2019 16:42

Re: Oil leak from valve cover
 
Quote:

Originally Posted by Cheechako (Post 2984468)
ie: port fuel tank; engine dies. Maybe your vent on that tank is clogged? If you run it and it dies open the deck fill... vacuum there?


Checked the vent and it's clear although I checked just the line from the tank to the deck fitting. Just to be sure I'll check the fitting on the tank as well but seems highly unlikely that there's a clog there.


I know the pickup from the port tank works because I hooked up my spare fuel pump and transferred the fuel to the stbd tank on the trip north. Down to two ideas. First will pull all the hoses off the selector valve (again) and double check that all lines and the valves are clear. If I verify that then the last idea I have is an air leak somewhere in the port side lines.

skipmac 26-09-2019 16:47

Re: Oil leak from valve cover
 
Quote:

Originally Posted by JPA Cate (Post 2984606)
Cormorant fix:

What is done here seems to work. Take the monofil, and run a bit of it from a screw into the mast about 6" above the spreader out to the shroud. Do it for all your spreaders. Take one, from the mast to the backstay, and if necessary take some cable ties and use them on the pushpit and bow pulpit. Leave the ends sticking up. Make it so it's unpleasant for little flipper feet, and they have a hard time seeing them. Usually they'll select another boat for a perch.

And now, to the port fuel tank issue!

Ann


Thanks for the suggestions but I've already strung so much monofilament around the boat it looks like I was attacked by a large herd of giant spiders on steroids. No matter how I've run the line they seem to find a way to get to a roust and dump on my boat.



After cleaning the entire boat for the fourth time I have declared all out war, no quarter. I'm normally a nonviolent kind of guy but I've had enough. Set out a dozen mouse traps where they have been pooping. I had a plague of raccoons tearing up my barn a few years ago that I couldn't get rid of until I laid out a batch of mouse traps. That was the last night I ever saw them. Hope it works as well with the cormorants.

Jim Cate 26-09-2019 19:01

Re: Oil leak from valve cover
 
So, once you catch 'em, how ya gonna cook them?

Seriously, if perchance you do end up trapping one, and if it should die in the process, we've heard that hanging the corpse in the rigging will greatly discourage further occupation. Dunno if it is truly so, but if you have a spare dead bird around it would be worth a try!

Or you could post a sign on a neighbor's boat saying "free beer for birds here" and see what happens!

Jim

Jim

Robert Jansen 27-09-2019 10:38

Re: Oil leak from valve cover
 
If the leak is in the same place after replacing the gasket, and assuming that the replacement was performed in a reasonably competent manner (after all, it's not rocket science), a warped valve cover is a likely suspect. Before replacing the gasket again, check the valve cover. If you place it on a reference flat surface, and it rocks, even a little, you have found your cause. Sometimes they can be restored, sometimes they cant.

sdj 27-09-2019 11:44

Re: Oil leak from valve cover
 
You're not supposed to use any goop on those gaskets. The gaskets stick perfectly well to any CLEAN surface on their own, particularly the oldschool cork gaskets which will split in half if you try pull them apart if assembled correctly.

Get a new gasket (make sure it comes wrapped and sealed), pull the cover off and check that it's not bent, mop up any oil, then wipe with alcohol and a new clean rag - repeat this three times so the surface is completely clean.

Without touching the clean surfaces OR the new gasket, lay it perfectly in place and torque it down correctly according to the manual. No goop please. That cover won't come off without a wrestle, nor will it leak.

arcticmonkey 28-09-2019 12:09

Re: Oil leak from valve cover
 
maybe a new cover... always carry a spare.... and form a loving relationship with the engine. I found the 4108 a nice reliable engine... good luck

Cadence 28-09-2019 14:26

Re: Oil leak from valve cover
 
Maybe some cork gasket material a small ballpeen hammer, to peen a gasket, and some Permatex in a can with the brush in the top would solve it?


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