> Bill wrote:
> >I have an oil leak that finds its way to the passenger side CVJ and
> >then slings out. I cleaned the underside well then got underneath
> >with the engine running and waited for the drops of oil to start.
> >Soon I saw a drop appear on the underside of the PCV breather/
> >separator. Last weekend I removed the breather/separator and
> >reapplied RTV to the surface interface with the timing chain cover.
> >The leak continued. I thought: darn, I should have removed the new
> >PCV valve, put Teflon tape on the threads and put it back but at the
> >time I saw no evidence of oil from the area of the threads. This
> >weekend I again removed the breather/separator but this time
> >completely. I had another from an old engine into which I threaded
> >the PCV valve using Teflon tape. Also I mashed some RTV up against
> >the timing chain cover surface interface with the block at that spot
> >just in case the leak was there. Cleaning the timing chain cover/
> >breather interface well, I used RTV again. After 24 hours for the RTV
> >to cure, I took the car for a drive and the oil leak persists. The
> >leak amounts to a couple of puddles, one the diameter of a golf ball
> >and the other the diameter of a racket ball, appearing after I get to
> >work in the morning. The head had recently been replaced and I had
> >put in a new timing chain, guides and tensioner. When I last removed
> >the breather/separator/PCV there again was no evidence of oil under
> >the PCV valve itself. There's a brace for the power steering just on
> >the outside of the breather which prevents me from getting eyes on the
> >timing chain cover. I don't see how it's possible to remove this
> >brace without lifting out the engine. What I just tried a minute ago
> >was rolling paper towels and tucking them: a) between the power
> >steering brace and the breather, b) on the inside of the breather
> >outer top where there's a half inch opening. I let the engine run for
> >a few minutes but no evidence of oil at those spots.
>
> >I realize it's difficult to get a clean seal between the breather and
> >the timing chain cover so the RTV will bond cleanly but I went over it
> >well with brake cleaner which dries without a residue and I don't
> >believe I could have failed to get a good seal there twice.
>
> >Anyone seen or heard of this kind of oil leak?
>
> >billy.johns...@[EMAIL PROTECTED]
> >Heard County, GA (formerly of Long Island)
>
> --
> Message posted via
CarKB.comhttp://www.carkb.com/Uwe/Forums.aspx/nissan-altima/200709/1
On Oct 3, 11:04 am, "loewent via CarKB.com" <u10197@[EMAIL PROTECTED]
> wrote:
> You didn't mention the year of your vehicle... the following applies to
93-
> 98 Altimas.
>
> I had a leak on my 93 Altima after a 3500km roadtrip in the heat of the
> summer. After searching google, there were 2 possible culprits.
>
> #1 was the crank seal.
>
> #2 was an o-ring between the timing cover and the engine block. here is
a
> good website showing how to do the repair, and why it
failed.http://www.prb2.com/altima/
(also has a good write up on the timing
chain
> guide issue on these motors)
>
> My problem was the crank seal. It took about 30 minutes to replace. I
still
> have the O-Ring I got from the dealer. Since my car no longer leaks, I
> haven't bothered to do the job.
>
> t
>
Well, it's Thursday night and I just took another look. When I was
under the car and watched the drip form I had then gone over to an old
block I have here and thought I identified the leak as somewhere near
the embossed "Z" on the block inside the lower timing chain cover near
the oil ****t into the block. Then when I went in to fix it, moving
the power steering pump toward the engine wall, I thought, and maybe
did, identify oil on the bottom of the PCV breather. That off and on
twice the last 2 weekends didn't fix it. Tonight I was looking at the
Haynes manual and the photo of the timing chain cover on page 2A-17
and seeing how the breather access is stepped out, that when I mashed
some RTV between the block and the breather edge I might not have
gotten to a potential leak. Getting under there tonight I didn't
clearly see oil under the breather and in fact really didn't clearly
see oil there that second time I removed the breather because the
earlier RTV application was a bit messy and it is a ****ny black.
Under there tonight I realized that somewhere I had lost sight of the
probable leak being just about where that embossed Z is. If one looks
at photo 12.3b on page 2A-15, the oil first appears as a drop on the
bottom of the outcropping just beyond the back end of the far left
arrow. It's related to the oil pump. One can't get a good look at
that spot not because it isn't possible but because the power steering
pulley is in the way. If the mechanic had overtorqued the bolt above
the ****t of the oil pump he may have cracked the timing cover a bit.
The last 2 weekends I was concentrating on the PVC and breather.
Apparently I should have put on my reading gl***** and taken a close
look at the timing cover while the power steering pump was held to the
firewall with a wire clothes hanger. Well, if the weather is nice
that will get done this weekend.
Bill
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