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
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.johnston@[EMAIL PROTECTED]
>Heard County, GA (formerly of Long Island)
--
Message posted via CarKB.com
http://www.carkb.com/Uwe/Forums.aspx/nissan-altima/200709/1
|
