Oil Leak

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Old 17 Feb 2005, 10:06 pm   #1 (permalink)
bhides@gmail.com
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Default Oil Leak

Hi all,
I have a 94 Toyota Camry 1MZ-FE engine (V6). Recently I have had
oil drops underneath the car in my parking space. I noticed that the
engine block seal is leaky. I can only check the front part as the
other 3 pistons are at the back behind the manifold; I am sure they
leak as well, though.
How much would it cost me to change the seal on the valve cover?
(Thats what it is called, isn't it?) (mechanic says around $350 or
less)

Now, a mechanic here says that by changing the valve cover gasket, the
pressure (oil) in the engine will build up and cause more leaks from
places that had really small leaks. This seems to be logical, but is
it practical? If so how many seals would I be changing to minimize the
oil leak?
I will be changing the oil pan seal myself to save some money .
Recently, I have noticed that when I am crusing at 70mph, and if I am
climging up hill, there is a small drop in the speed, really small
though (fraction of a mile). But this was not present before for sure.
I can see the needle move back and forth. Could this be due to the oil
leak in the engine?

Any pointers and suggestions are welcome.

TIA,
Shashank

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Old 18 Feb 2005, 06:11 am   #2 (permalink)
qslim
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Default Re: Oil Leak

$350 US is a fair price for changing the valve cover gaskets on a V6. There
is quite a bit of labour involved. At the same time, make sure that the
technician is going to replace the spark plug tube seals, intake manifold
gasket, and re-seal the "half moon" plugs. Also have him ensure that the
PCV system is working correctly, for that can be the cause of leaking VC
gaskets if it is not.

As far as future oil leaks, when your technician is done with the VC
gaskets, ask that he thoroughly clean the engine of all residual oil, so
you can better track future leaks. Oh, and replacing VC gaskets will NOT
have an effect on oil pressure.

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Old 18 Feb 2005, 10:24 am   #3 (permalink)
bhides@gmail.com
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Default Re: Oil Leak

Thanks for the reply,
BTW how much, do you think, would the rest cost me? changing spark
plug tube seals. intake manifold gasket and re-sealing of half moon
plugs?

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Old 18 Feb 2005, 07:03 pm   #4 (permalink)
mdouglas
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Default Re: Oil Leak

Changing the valve cover gaskets will not cause more oil leaks. It is
common for the valve cover gaskets to start leaking on the V6 motors due
to the heat in the engine compartment. Engines are designed to breath so
fixing one leak will not cause another, unless the mechanic fixing the
leak doesn't know what he is doing.

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Old 18 Feb 2005, 08:14 pm   #5 (permalink)
qslim
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Default Re: Oil Leak

The spark plug tube seals, intake manifold gasket, and re-sealing of the
half-moons should all be part of a valve cover replacement on a front
wheel drive V6 engine. The intake manifold has to be removed during the
process, so replacing the intake manifold gasket at that point is a matter
of laying a new one down. The half moons should always be resealed when the
VC is removed, and it only takes a few minutes. The spark plug tube seals
can be a pain, so if your tech wants a little extra time, that's
acceptable. Toyota sells a valve cover gasket "kit" for your car
(including all mentioned above), and I want to say that it is somewhere in
the neighborhood of $120.00, and you can expect somewhere around 4 hours of
labour to be charged.
The

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Old 18 Feb 2005, 09:24 pm   #6 (permalink)
mdouglas
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Default Re: Oil Leak

The intake manifold does not have to be removed to do valve cover gaskets,
only the intake plenum. After the plenum is removed it still takes 45
minutes to an hour to do the cover gaskets. Resealing the tubes at that
point is another hour or so. Toyota as a whole does not sell such a kit. A
dealer may offer a kit but it would be something it put together. If you
want this done, you will need 2 valve cover gaskets, an air intake plenum
gasket, 4 "half moon gaskets" and a sealant for the spark plug tubes. The
spark plugs screw in so a special tool ios needed to remove them without
damage.

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Old 19 Feb 2005, 06:12 am   #7 (permalink)
qslim
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Default Re: Oil Leak

The spark plug tube seals are round rubber seals inside the valve cover.
I'm not talking about removing the tubes themselves, just replacing the
seals.

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Old 21 Feb 2005, 12:54 pm   #8 (permalink)
bhides@gmail.com
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Default Re: Oil Leak


qslim wrote:
> The spark plug tube seals, intake manifold gasket, and re-sealing of

the
> half-moons should all be part of a valve cover replacement on a front
> wheel drive V6 engine. The intake manifold has to be removed during

the
> process, so replacing the intake manifold gasket at that point is a

matter
> of laying a new one down. The half moons should always be resealed

when the
> VC is removed, and it only takes a few minutes. The spark plug tube

seals
> can be a pain, so if your tech wants a little extra time, that's
> acceptable. Toyota sells a valve cover gasket "kit" for your car
> (including all mentioned above), and I want to say that it is

somewhere in
> the neighborhood of $120.00, and you can expect somewhere around 4

hours of
> labour to be charged.
> The


Thanks for your reply.

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Old 21 Feb 2005, 12:55 pm   #9 (permalink)
bhides@gmail.com
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Default Re: Oil Leak

Thanks for the detailed information you all. I appreciate it .

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