BEST RTV Sealant for sealing up oil leak between head/timing cover?
loadhawg
leak.
I've got a Nissan 4cyl OHC with the front timing cover 'sandwiched'
between the head and the oil pan. It's got a nasty little leak right
at the top just about where the the cam sprocket likely slings the
oil. I REALLY don't want to take this thing off to fix that darn
leak.
I know exactly where the leak is, can access it from the outside and
likely can get some degree of access from inside (w/ valve cover off):
Idea is to clean as thoroughly as I can and squirt/dab/whatever some
really good sealant in either side of where the timing cover mates to
the head and let it set, cure and hopefully solve the problem. Doesn't
have to look pretty just, needs to work and save me the hassle of
taking the cover off and possibly pulling the head or lifting the
engine enough to get the oil pan off.
I've had good luck with the gray 'import' RTV. Any others that might
be better...? Particular brands? Types? Other types of sealants
besides RTV for this?
BTW both the timing cover and the head are aluminum.
Appreciate a recommendation for a the best RTV type/brand that is up
for the task and will last.
thanks
gsx...@hotmail.com
I have had good luck with PERMATEX High Temp rtv. I clean the area
really well with rubbing alcohol and a clean rag first.
http://www.permatex.com/products/automotive/automotive_gasketing/gasket_makers/auto_Permatex_High-Temp_Red_RTV_Silicone_Gasket.htm
Good luck
Daniel
> Need recommendations for a really good RTV sealant for sealing up oil
> leak.
Toyota makes a FIPG (form in place gasket) material that is excellent
- specified as oil pan sealant and also for spots on the valve covers
near the cams and it won't harm oxygen sensors.
Part number should be 00295-00103.
While it is designed to be installed between surfaces as a gasket
forming material, I've found it sealed a pesky leak in the top of the
plastic coolant recovery tank near the mounting bracket where other
materials did not last. Good adhesion forming a tough flexible oil
resistant seal.
*
loadhawg <load...@gmail.com> wrote in article
<1170817167.6...@a34g2000cwb.googlegroups.com>...
Another shade-tree, hammer-mechanic, mis-use of a good product......
There is really no RTV sealant designed to work in the way you want to use
it.
Gob it on the outside, and the oil coming through from behind will knock it
off in no time.
Gob it on the inside, and it will break off - perhaps blocking the oil
screen or an oil galley and starving the engine for oil. Worst case, it
gets into the oil pump and destroys that, too!
The instructions on RTVs designed for automotive use - if you take the time
to read them - are quite specific about using the stuff sparingly, and
cleaning up any excess that is squeezed out from between the two parts for
the above reasons.
You, on the other hand, WANT to set up gobs inside and outside the engine.
RTV should be thought of as a gasket that goes between two
components.....NOT a coating that goes on OVER the two components......
.....because that is what it is - and, more importantly, ISN'T!
Steve
> Need recommendations for a really good RTV sealant for sealing up oil
> leak.
Permatex "The Right Stuff."
*
gsx...@hotmail.com wrote in article
<1170850559....@h3g2000cwc.googlegroups.com>...
Permatex RTV sealants are engineered and designed to work as GASKET
MAKERS......not overcoats.
They are designed to be used BETWEEN components, not OVER them.
I doubt if any combination of Brake Clean, Choke Cleaner, Rubbing Alcohol,
Sulphuric acid, etc. will EVER clean the oil-soaked interior on an engine
enough to allow the product to stick well - especially when you consider
that is not what it is designed to do in the first place.
Permatex suggests cleaning up ANY excess product that is squeezed out
between components during assembly because when it breaks off it can - and
WILL - clog oil passages.
You, OTOH, are suggesting that the OP actually develop such gobs of
material inside his engine.
More shade-tree mis-use of a good product.............
H...@nospam.nix
"*" <nos...@this.addy.com> wrote in message
news:01c74ac8$7abd7620$4e93c3d8@race...
> You, on the other hand, WANT to set up gobs inside and outside the engine.
>
> RTV should be thought of as a gasket that goes between two
> components.....NOT a coating that goes on OVER the two components......
>
> .....because that is what it is - and, more importantly, ISN'T!
On this we agree. Gob daubing is not good practice.
The RTVs are great compounds, and used properly can solve a myriad of
problems, but not as gob stoppers.
Scott Buchanan
The surface needs to be very clean and should be roughened up for better
adhesion. Make sure that you let it get a full cure before starting the
engine. I'd use the high temp permatex. You should check the crank case
ventilation system to be sure that it is not pressurizing the engine causing
the leak.
I read once that the guy drew a vacuum on his crank case and then used a
super glue type product at the leaks with good results. The vacuum pulled
the glue into the gap that was causing the leak.
"loadhawg" <load...@gmail.com> wrote in message
news:1170817167.6...@a34g2000cwb.googlegroups.com...
Donald Lewis
>Need recommendations for a really good RTV sealant for sealing up oil
>leak.
>
>I've got a Nissan 4cyl OHC with the front timing cover 'sandwiched'
>between the head and the oil pan. It's got a nasty little leak right
>at the top just about where the the cam sprocket likely slings the
>oil. I REALLY don't want to take this thing off to fix that darn
>leak.
>
>I know exactly where the leak is, can access it from the outside and
>likely can get some degree of access from inside (w/ valve cover off):
>Idea is to clean as thoroughly as I can and squirt/dab/whatever some
>really good sealant in either side of where the timing cover mates to
>the head and let it set, cure and hopefully solve the problem. Doesn't
>have to look pretty just, needs to work and save me the hassle of
>taking the cover off and possibly pulling the head
This is a pickup? If its NOT 4x4 pulling the pan is a breeze. You do
NOT need to pull the head to remove and reinstall the timing cover.