Toyota 7MGE valve cover oil leak passenger side

Reply
 
LinkBack Thread Tools Display Modes
Old 07 Mar 2013, 05:18 am   #1 (permalink)
Doc
Guest
  • Posts: n/a
  • User Status:


Default Toyota 7MGE valve cover oil leak passenger side

Have an 89 Toyota Cressida with a 7MGE DOHC 6 engine. For a while I've
had a chronic, persistent oil leak on the passenger valve cover. On
the driver side, I hand tighten the valve cover seat of the pants, no
particular special effort, no problems. On the driver side I can't get
it to seal. Where I always notice it is at the front by the hump for
the cam shaft end. At first I thought it was oil getting past the
distributor but it's definitely coming from the junction of the valve
cover gasket. Causes smoking and the loose oil eventually destroys
hoses, spark plug boots.

Tried 3 new gaskets, no luck. Various degrees of tightness, nothing
seems to make a difference. The tube for the PCV ports isn't clogged
so I don't think it's some pressure buildup issue. I can't detect any
warping or cracking of the valve cover. I've never run into this
before.

Any suggestions?

Thanks.
  Reply With Quote
Old 07 Mar 2013, 07:23 am   #2 (permalink)
Tegger
Guest
  • Posts: n/a
  • User Status:


Default Re: Toyota 7MGE valve cover oil leak passenger side

Doc <docsavage20@yahoo.com> wrote in news:64da1379-7802-44a4-a0ce-
6cd0716fe683@p5g2000yqj.googlegroups.com:

> Have an 89 Toyota Cressida with a 7MGE DOHC 6 engine. For a while I've
> had a chronic, persistent oil leak on the passenger valve cover. On
> the driver side, I hand tighten the valve cover seat of the pants, no
> particular special effort, no problems. On the driver side I can't get
> it to seal. Where I always notice it is at the front by the hump for
> the cam shaft end. At first I thought it was oil getting past the
> distributor but it's definitely coming from the junction of the valve
> cover gasket. Causes smoking and the loose oil eventually destroys
> hoses, spark plug boots.
>
> Tried 3 new gaskets, no luck. Various degrees of tightness, nothing
> seems to make a difference. The tube for the PCV ports isn't clogged
> so I don't think it's some pressure buildup issue. I can't detect any
> warping or cracking of the valve cover. I've never run into this
> before.
>




Are you making sure the gasket and its receiving surfaces are bone-dry
before assembling? Any oil film anywhere will allow seepage.

How did you check the valve cover for straightness?

Why don't you tighten the fasteners to their correct torque?


--
Tegger
  Reply With Quote
Old 07 Mar 2013, 10:56 am   #3 (permalink)
Doc
Guest
  • Posts: n/a
  • User Status:


Default Re: Toyota 7MGE valve cover oil leak passenger side

On Mar 7, 7:23*am, Tegger <inva...@example.com> wrote:

> Are you making sure the gasket and its receiving surfaces are bone-dry
> before assembling? Any oil film anywhere will allow seepage.



Turns out it's a moot point. The problem isn't the gaskets, it's the
cam seal.
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 04:46 pm.

Attribution:
Autoblog
Powered by Yahoo Answers



ToyotaLexusForum.com is an unofficial community for car enthusiasts. ToyotaLexusForum.com is not affiliated with Toyota Motor Corporation in any way.
Toyota Motor Corporation does not sponsor, support, or endorse ToyotaLexusForum.com in any way.
Copyright/trademark/sales mark infringements are not intended or implied.