Having a problem with my 92 F150 oil pan gasket

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Glimmer-pins - 20 Jul 2007 02:11 GMT

I changed the gasket myself and it started leaking after a week. I
payed a mechanic to do it again and it lasted a few months. Now its
leaking again and I noticed it looks like the gasket is pushed out in
some areas? I have never seen a gasket push out like this before. The
mechanic did use gasket sealer on the gasket when he installed it the
second time. The PVC valve was changed before this happed so I don't
think that's the problem. The truck is a 92 with only 65K on it and it
runs great and has the I-6 4.9L engine. Does anybody have any idea of
why this would happen? I hate to change it another time if it's going
to do to the same thing again and blow out. The gasket I have been
using is the feel-pro blue gasket. Any ideas would be greatly
appreciated.

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Nate Nagel - 20 Jul 2007 02:24 GMT

> I changed the gasket myself and it started leaking after a week. I
> payed a mechanic to do it again and it lasted a few months. Now its
[quoted text clipped - 8 lines]
> using is the feel-pro blue gasket. Any ideas would be greatly
> appreciated.

Take a look at the whole PCV system, also can you see if there's any
sludge in the head? plugged oil drainback holes might cause crankcase
pressure to build up.

nate

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Steve Barker - 20 Jul 2007 02:38 GMT

only way to make the repair successful is :

1. NO gasket sealer
2. perfectly clean and dry surfaces (lots and lots of brake cleaner and
compressed air)
3. use only a gasket from the ford parts counter.

in your particular case, i'd say the aftermarket gasket (first time) and
sealer (second time) were the downfalls.

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Steve Barker

>I changed the gasket myself and it started leaking after a week. I
> payed a mechanic to do it again and it lasted a few months. Now its
[quoted text clipped - 8 lines]
> using is the feel-pro blue gasket. Any ideas would be greatly
> appreciated.

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lugnut - 20 Jul 2007 13:04 GMT

>I changed the gasket myself and it started leaking after a week. I
>payed a mechanic to do it again and it lasted a few months. Now its
[quoted text clipped - 8 lines]
>using is the feel-pro blue gasket. Any ideas would be greatly
>appreciated.

If it is the silicon gasket, it is likely either/or both a
result of over tightening and a less than clean surface.
Newer silicon gaskets have a metal inset and are very
expensive but, work well. Over the year, the 4.9L has used
both cork and paper based gasket. Both worked well. If it
is available, the metal reinforced silicon is probably the
best installed on a clean surface. Make sure the pan flange
is flat. Although it is not common for the 4.9L to have a
PVC problem, you should make sure the crankcase ventilation
system is working properly. You might also want to check
the hoses and tubes to make sure they are completely open as
they sometimes clog with carbon and sludge over the years
causing crankcase pressure under loaded engine operating
conditions.

Lugnut

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