oil pan rtv question

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jdeere86
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oil pan rtv question

Postby jdeere86 » Mon Jan 18, 2016 7:01 pm

got pan off of cub - question is since it is in 20s during day will that black permatex rtv seal okay? package doesn't really list a temp. I know it stands for room temp volcanizing or something ...

I did the pan on my 140 couple weeks ago and let set for couple days before adding oil....seemed to have set up okay...was in the 40's or so then...

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Re: oil pan rtv question

Postby John *.?-!.* cub owner » Mon Jan 18, 2016 7:04 pm

It should be ok as long as you follow directions. I believe it states to let it cure enough to form a skin before putting parts in place. That may take a while in the 20s.
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Re: oil pan rtv question

Postby tst » Mon Jan 18, 2016 7:08 pm

the regular gasket works better than the rtv

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Re: oil pan rtv question

Postby jdeere86 » Mon Jan 18, 2016 7:17 pm

I am using rtv with the gasket

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Re: oil pan rtv question

Postby ricky racer » Mon Jan 18, 2016 8:25 pm

Flatten out the mating surface of the pan before installing. Over tightening causes the holes to pull up making it harder to seal. With a nice flat sealing surface and a new gasket it should seal up nicely with a very thin coat of sealer, I prefer Permatex High-Tack myself. Just don't over tighten the fasteners and deform the pan lip again.
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Re: oil pan rtv question

Postby Eugene » Mon Jan 18, 2016 8:54 pm

I would use the high temperature rtv, usually red in color, on oil pans. Read the information on the sales card before purchase.

I have used the black rtv for non-high temperature applications. 100% success rate.

Before application I clean the mating surfaces. Then spray the mating surfaces with brake cleaner to remove any grease or oil residue.
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Re: oil pan rtv question

Postby twotone » Mon Jan 18, 2016 9:11 pm

I use Permatex #2 non hardening on pretty much all the gaskets. It's messy, kind of like working with anti seize, but I've never had a leaker. It comes off pretty easy too.
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Re: oil pan rtv question

Postby Puffie40 » Tue Jan 19, 2016 1:29 am

RTV silicones require humidity to cure (part of the process is a hydrolysing of the compound), so 20F (-6c) isn't really a good temperature to use that stuff.

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Re: oil pan rtv question

Postby Sailor » Tue Jan 19, 2016 3:00 am

If you are using the Ultra Black, it directs you to tighten the bolts down, with your fingers, until the product starts to ooze out, then wait one hour before torqueing the bolts down.
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Re: oil pan rtv question

Postby rexxon » Tue Jan 19, 2016 5:57 am

I was working on my pulling tractor a couple of year ago--C153 in a Super C and when I started the motor for the first time I had very little oil pressure so I figured it was the oil pump gasket but as I knew nothing of the engine history I pulled the oil pump and just put the pan on with black rtv in case I needed to pull the pan back off right away-- luckily the spare oil pump I had was good and after 2 pulling season the pan has not leaked a drop. That black ultra rtv is a good as orange rtv was bad

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Re: oil pan rtv question

Postby havoc1482 » Wed Jan 20, 2016 10:12 pm

tst wrote:the regular gasket works better than the rtv


Unless you have an uneven mounting surface as previously pointed out. It will seal better because it will fill in the slightly wider areas. I sealed my PTO\Belt Pulley with the black stuff and its never leaked.
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Re: oil pan rtv question

Postby Eugene » Wed Jan 20, 2016 10:45 pm

I keep RTV and gasket material on hand. Some gaskets are to large to cut from the gasket material on hand. This is where the RTV comes in handy.

Also for larger gaskets, such as the pan gasket, the RTV is much cheaper. And there is no 1 or 2 day delay if I only need one gasket.
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Re: oil pan rtv question

Postby outdoors4evr » Thu Jan 21, 2016 9:28 am

It might be helpful to put a spaceheater or a heat lamp under the oilpan. RTV works best at 60+ degrees.
If this is not possible, then give it more time to set than the label indicates. At this temp, I wouldn't add oil for a couple of days after applying.
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Re: oil pan rtv question

Postby jdeere86 » Thu Jan 21, 2016 10:04 am

ya'll are the best! thank you :thanx: :hattip:


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