Australian Land Rover Owners

Gallery Donate Games Arcade Calendar Markets Shop Chat Subscribe! Files Links
Go Back   Australian Land Rover Owners > Technical Forums > Technical Chatter


Technical Chatter Tips, Tricks, and Technocrats

Reply
 
Thread Tools Display Modes
  #1 (permalink)  
Old 2nd August 2009, 03:48 PM
Utemad's Avatar
TopicToaster
 
Join Date: Jan 1970
Location: Dalby
Posts: 4,013
Thanks: 91
Thanked 360 Times in 291 Posts
V8 valley cover oil leak

Hi all,

If oil is sitting all over the top of the valley cover gasket, what would be the common causes?

I was thinking it would be the end rubbers in the valley but they are under the gasket so not sure how the oil would get out and then up and over it.

The leak seems to accumulate on top of the valley gasket and then runs down the front and coats the RHS of the motor and the front diff.

I replaced the valley cover gasket and the end rubbers about 2 years ago or more. This leak has been there for a few months at least though. Been ignoring it but it is getting worse.

Any ideas where the oil is coming from?

Just to add it is a 3.9 V8 serpentine belt motor in a 1994 Discovery.
Reply With Quote
Sponsored Links
  #2 (permalink)  
Old 2nd August 2009, 07:38 PM
langy's Avatar
Wizard
 
Join Date: Jan 1970
Location: Somewhere else, QLD
Posts: 1,866
Thanks: 9
Thanked 483 Times in 430 Posts
Give the engine a clean and take the flame trap/pcv filter off. That will at least confirm or eliminate the standard version of valley cover oil leak. ( Flame trap gums up and blowby pressurizes the crankcase and blows oil mist out everywhere it can).

Whether or not another valley cover/gasket is needed is unknown.

Of course it could be a leaking rocker cover gasket as well. If you can track the oil leak, it will give you a better idea on what may be a bigger problem.
Reply With Quote
  #3 (permalink)  
Old 2nd August 2009, 08:07 PM
justinc's Avatar
Moderator
Vendor
 
Join Date: Aug 2006
Location: Kingston, Tassie, OZ.
Posts: 10,667
Thanks: 2,577
Thanked 4,677 Times in 3,245 Posts
Quite possibly the rocker cover gaskets, if it still has the rubber type gaskets, then even if they are tight they can still leak like a seive. A bit of a pain to change but easier than the valley etc.

JC
__________________
The Isuzu 110; where 'limp home mode' means you've stubbed your toe badly down in the shed while working on the landy, and you need to get to the house for a band aid and a cuppa ....
To view links or images in signatures your post count must be 1 or greater. You currently have 0 posts.
Reply With Quote
  #4 (permalink)  
Old 2nd August 2009, 08:33 PM
Utemad's Avatar
TopicToaster
 
Join Date: Jan 1970
Location: Dalby
Posts: 4,013
Thanks: 91
Thanked 360 Times in 291 Posts
Thanks guys. I figure it is the rocker cover gaskets too. Was just putting it out there to see if there was something I hadn't thought of.

I replaced both rocker cover gaskets when I did the valley etc last time. I used the rubber ones.

JC it is interesting to hear you say that the rubber ones are no good as I used them last time due to hearing that they were the way to go.
I had changed the driver's side gasket once earlier (with rubber one) and when I did them again with the other work it had split along its length and was leaking so I am already dubious of their all round goodness.
What do you use/recommend?

I have cleaned the PCV steel wool/mesh thing before. Will clean it again when I redo the tappet cover gaskets. Didn't think of that pressurising the joints so thanks for that.

Thanks
Reply With Quote
Sponsored Links
  #5 (permalink)  
Old 2nd August 2009, 08:37 PM
justinc's Avatar
Moderator
Vendor
 
Join Date: Aug 2006
Location: Kingston, Tassie, OZ.
Posts: 10,667
Thanks: 2,577
Thanked 4,677 Times in 3,245 Posts
Quote:
Originally Posted by Utemad View Post
Thanks guys. I figure it is the rocker cover gaskets too. Was just putting it out there to see if there was something I hadn't thought of.

I replaced both rocker cover gaskets when I did the valley etc last time. I used the rubber ones.

JC it is interesting to hear you say that the rubber ones are no good as I used them last time due to hearing that they were the way to go.
I had changed the driver's side gasket once earlier (with rubber one) and when I did them again with the other work it had split along its length and was leaking so I am already dubious of their all round goodness.
What do you use/recommend?

I have cleaned the PCV steel wool/mesh thing before. Will clean it again when I redo the tappet cover gaskets. Didn't think of that pressurising the joints so thanks for that.

Thanks

Sorry, I meant they ARE the best ones (The ones with the metal inserts in the bolt holes, as per OEM) until they go hard, and then due to the metal inserts you can't tighten them up any further. These are all I use now.

JC
__________________
The Isuzu 110; where 'limp home mode' means you've stubbed your toe badly down in the shed while working on the landy, and you need to get to the house for a band aid and a cuppa ....
To view links or images in signatures your post count must be 1 or greater. You currently have 0 posts.
Reply With Quote
  #6 (permalink)  
Old 2nd August 2009, 09:03 PM
Utemad's Avatar
TopicToaster
 
Join Date: Jan 1970
Location: Dalby
Posts: 4,013
Thanks: 91
Thanked 360 Times in 291 Posts
Thanks JC. I did use the rubber ones with the metal bolt hole bits.

Do you silicone them on to the head?
I'm thinking of doing so this time around.
Reply With Quote
  #7 (permalink)  
Old 2nd August 2009, 10:47 PM
justinc's Avatar
Moderator
Vendor
 
Join Date: Aug 2006
Location: Kingston, Tassie, OZ.
Posts: 10,667
Thanks: 2,577
Thanked 4,677 Times in 3,245 Posts
Quote:
Originally Posted by Utemad View Post
Thanks JC. I did use the rubber ones with the metal bolt hole bits.

Do you silicone them on to the head?
I'm thinking of doing so this time around.
No sealant required, I find I just sit them on the top of the head and jiggle the rocker cover around until the holes line up, make sure the edges are outside the cover and bolt em down tight

JC
__________________
The Isuzu 110; where 'limp home mode' means you've stubbed your toe badly down in the shed while working on the landy, and you need to get to the house for a band aid and a cuppa ....
To view links or images in signatures your post count must be 1 or greater. You currently have 0 posts.
Reply With Quote
  #8 (permalink)  
Old 2nd August 2009, 11:36 PM
p38arover's Avatar
RoverLord
 
Join Date: Jan 1970
Location: Western Sydney
Posts: 22,047
Thanks: 2,799
Thanked 4,506 Times in 2,860 Posts
Check the rocker cover bolts. They loosen and allow the gaskets to leak. The bolts are standard 12-point heads but trying to find a 12-point socket in 1/4" drive is a little difficult. I borrow one from my local LR workshop.
__________________
Ron B.

1995 P38A Range Rover HSE 4.6 V8 Auto; Yamaha XJR1300


To view links or images in signatures your post count must be 1 or greater. You currently have 0 posts.


RIP Bucko - Riding on Forever
Reply With Quote
  #9 (permalink)  
Old 3rd August 2009, 05:47 PM
Utemad's Avatar
TopicToaster
 
Join Date: Jan 1970
Location: Dalby
Posts: 4,013
Thanks: 91
Thanked 360 Times in 291 Posts
Alrighty then. Just finished slashing the back of my right arm on some zip ties that weren't properly trimmed. Oh what fun.

While I was doing that I removed all the 12 point bolts and replaced them with allen key bolts. Socket head screws I think they called them. The same type that are holding your plenum cover lid on but smaller.
Those factory bolts annoyed me once too often.
They are 1/4in UNC. One lot were just under 1in long and the other lot were 1 1/2in long.
I glued washers under the heads with one of the Loctite glues.
Didn't remove the tappet cover gaskets as they seemed pliable going by the protruding edge/lip and they are only a couple of years old so I hope they are still ok.

I also cleaned the steel sponge mesh in the PCV/fire trap thing again. It was thick with oil in the mesh (not gungy but fresh stuff) so I don't know if it is meant to be like that or if it was clogged. The hose that came off it that goes to the air intake was clean. Either way the mesh is clean now.

Ron I have the 12 point socket in 5/16 3/8 drive. 1/4in would be better but wasn't available at the shop when I bought it. Quite happy that I no longer need it for this job though.
Reply With Quote
  #10 (permalink)  
Old 3rd August 2009, 11:37 PM
LOVEMYRANGIE's Avatar
YarnMaster
Silver Subscriber
 
Join Date: Feb 2008
Location: Northern Windowlickersville WA
Posts: 3,346
Thanks: 541
Thanked 1,027 Times in 660 Posts
Quote:
Originally Posted by p38arover View Post
Check the rocker cover bolts. They loosen and allow the gaskets to leak. The bolts are standard 12-point heads but trying to find a 12-point socket in 1/4" drive is a little difficult. I borrow one from my local LR workshop.
I got an 8mm 3/8 drive 12 pt and it fits fine in the cover bolt recess. If it is a bit tight, just "finish" it off on a grinder a little bit.
Either that or just look in a Kingchrome catalogue and order one.

Cheers

Andrew
__________________

To view links or images in signatures your post count must be 1 or greater. You currently have 0 posts.

Bonnie - MY03 D2a TD5 Auto (One Bourbon)
Clyde - MY93 RRC 3.9 Classic (One Scotch)
Arfa - S2a 109" custom trailer (One Beer)
Earl - The "Duc" 2009 Ducati Sport Classic (chuck in a Lambrusco)
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 Off
Pingbacks are Off
Refbacks are Off



Search AULRO.com ONLY!
Search All the Web!

All times are GMT +10. The time now is 04:09 AM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2
Live Threads provided by AJAX Threads v1.1.2 (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Australian Land Rover Owners
Copyright 2001 - 2014, Dave Blears Computing - DavecandoIT and aulro.com