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post #1 of 31 Old 10-09-2019, 11:28 PM Thread Starter
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Valve cover gasket

I replaced the valve cover gasket on my SV600-0009 (Cub Cadet LT1045) a couple years ago due to leaking. It has started to leak again this year. After snooping around on the net a bit, I find some saying that Cub Cadet no longer recommends replacing the gasket and instead recommends RTV gasket maker.

I would like to know what you guys think and if you have dealt with this problem. If RTV gasket maker is the way to go, what version do I use and exactly how do I apply it.

Thanks,
Bruce

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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post #2 of 31 Old 10-10-2019, 01:30 PM
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Re: Valve cover gasket

just follow directions on the product container, more than likely apply to clean dry surface, remember more is NOT better, its to be a barrier to any oil seeping out, dont overtighten hold down bolts...
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post #3 of 31 Old 10-10-2019, 03:28 PM Thread Starter
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Re: Valve cover gasket

Thanks Ray, that is how I will proceed. I ordered a tube of the Permatex RTV Black Ultra off Amazon and it should be here tomorrow. It is isn't raining out, I will get on it.

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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post #4 of 31 Old 10-11-2019, 12:48 PM
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Re: Valve cover gasket

I didnt really impress...both mating surfaces must be clean and dry....a let it set up a bit before subjecting it to heat and oil.....lay the valve cover on a known FLAT surface, there may NOT be any gaps.....if so check back here.....might need new cover maybe not....Congrats.......you are now a Cub Cadet Mechanix.....Lol
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post #5 of 31 Old 10-11-2019, 01:38 PM
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Re: Valve cover gasket

[QUOTE=Pepperpikker;12356719]I replaced the valve cover gasket on my SV600-0009 (Cub Cadet LT1045) a couple years ago due to leaking. It has started to leak again this year. After snooping around on the net a bit, I find some saying that Cub Cadet no longer recommends replacing the gasket and instead recommends RTV gasket maker.....

Would you listen to Kohler for Cub Cadet issues?
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post #6 of 31 Old 10-11-2019, 01:44 PM Thread Starter
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Re: Valve cover gasket

When it comes to the Motor, I would go with Kohler. I just saw a bunch of reviews on the OEM gasket stating that the cork gaskets keep failing and they were being told to use RTV instead. Since mine failed twice, I have to kinda agree. And, yes, I did torque them down to specs.

I just got the RTV this morning and will go out and give it a shot, but temps are mid 40's right now and I am going to have to let it set for a couple days before I try to run the motor. I might run a little heat to it via electric fan to help with the stuff setting.

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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post #7 of 31 Old 10-11-2019, 03:18 PM
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Re: Valve cover gasket

RTV rocks!!!

"I've always been crazy but it's kept me from going insane." -Waylon Jennings
And even worse, I don't care.
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post #8 of 31 Old 10-11-2019, 04:10 PM
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Re: Valve cover gasket

Quote:
Originally Posted by Pepperpikker View Post
When it comes to the Motor, I would go with Kohler. I just saw a bunch of reviews on the OEM gasket stating that the cork gaskets keep failing and they were being told to use RTV instead. Since mine failed twice, I have to kinda agree. And, yes, I did torque them down to specs.

I just got the RTV this morning and will go out and give it a shot, but temps are mid 40's right now and I am going to have to let it set for a couple days before I try to run the motor. I might run a little heat to it via electric fan to help with the stuff setting.
Throw some of that heat on the motor to warm it up along with the valve cover before you put the goop on, might help a little also..
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post #9 of 31 Old 10-11-2019, 04:17 PM Thread Starter
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Re: Valve cover gasket

Thanks Ray. I decided to wait until later next week. The temps are supposed to rebound into the mid 50's. No need to rush it, I guess. But, yah, I plan to heat the valve cover and motor a bit before I do the RTV gasket.

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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post #10 of 31 Old 10-11-2019, 04:32 PM Thread Starter
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Re: Valve cover gasket

Another question: When I torque down the bolts with the RTV, do I torque them to the same specs as when using a regular gasket?

Valve Cover
Valve Cover Fastener Torque...................
11.0 Nm (95 in. lb.) Into new as-cast hole
7.5 Nm (65 in. lb.) Into used hole

I am assuming I go with 65 in lbs according to this spec since it is a "used" hole?

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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post #11 of 31 Old 10-11-2019, 04:46 PM
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Re: Valve cover gasket

I would suggest not overdoing it with the RTV though (putting gobs and gobs on), as the excess on the inside can come off and the bits make their way to the bottom of the engine, where the oil pump inlet is.

I am not arguing to not use RTV, just that this is not a case for "more is better".
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post #12 of 31 Old 10-11-2019, 04:53 PM Thread Starter
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Re: Valve cover gasket

Right. I am planning on limiting the amount used.

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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post #13 of 31 Old 10-12-2019, 01:07 PM
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Re: Valve cover gasket

Quote:
Originally Posted by Pepperpikker View Post
Another question: When I torque down the bolts with the RTV, do I torque them to the same specs as when using a regular gasket?

Valve Cover
Valve Cover Fastener Torque...................
11.0 Nm (95 in. lb.) Into new as-cast hole
7.5 Nm (65 in. lb.) Into used hole

I am assuming I go with 65 in lbs according to this spec since it is a "used" hole?
Thats how I would do it, then eyeball check it now and then, then in a few hours running time check for any looseness

Good Luck
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post #14 of 31 Old 10-12-2019, 01:45 PM Thread Starter
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Re: Valve cover gasket

Yah, I am tempted to do it today, but with the high for the day not getting above 45, I think I will wait. They are talking high fifties later next week. I would really like to get it done but, I better wait.
But, yah, I will go with 65 inch pounds. I just calibrated the torque wrench last night so I don't have to worry about stripping out the aluminum block.

2008 Cub Cadet LT 1045
Manufacture date: 2/20/2008
Kohler 20 HP single cyl. Twin cam OVH
Model SV600S
Spec No: SV600-0009
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post #15 of 31 Old 10-12-2019, 01:59 PM
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Re: Valve cover gasket

I second that comment about the valve cover mating surface has to be flat. I recall working on older engines with leaky stamped valve covers.

Spongy rubber or rubber/cork type gaskets allowed over tightened hold down bolts to deform the mating surface so that after a while, they just constantly leaked even with new gaskets.

It is difficult to re flatten them, but it can be done with patience. Using RTV allowed the
covers to be snugged down, as long as not so tight as to deform the cover.

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