Outer Limits 4x4 Board

I have been working on fixing the valley cover gasket on my 91 3.9 rangie.

I pulled it all out no worries and got the new one fitted but must have stuffed it up - I put it all back together and it looks like I have a leak somewhere - I am getting a coolant pooling on the valley cover and she is taking water into the sump :(

I have pulled the intake manifold off again and made sure I squared it all up - still got the same issue.

I am over it for the moment but I will have a look at it again in a few days, Any ideas ?

Thanks
Tom

ok .... no answers hey ... bugger

Just a quick question, the 3.9 EFi gasket is a single tin/metal piece isn't it,
I am off to buy another soon and just want to make sure they didn't supply me with the wrong one, it lined up ok and it looks the same as the old one ...

just thought I would ask.

Cheers
Tom

Isnt the EFI's valley cover rubberised ? I usaully put a little gasket cement just around the coolant passages on both sides of the cover.

the one I was sold was metal and the one that came off was metal.

Then I just read a post elsewhere about someone suggesting using the a different one but failed to elaborate.

I am going to buy another new gasket and try and refit tomorrow. The one I had seemed to line up perfectly but I still had a collant leak into the cylinder and or sump somewhere. Getting coolant in oil and getting coolant pooling on valley cover.

I have been using hylomar (sp?) to seal it

Tom

Hylomar is good stuff, race car engine builders use it.

Put a straight edge on the mating edges of the manifold and heads to check that they are flat, they may need a surface grind. If you are confident that the gasket is fitting good and you used a sealant (hylomar) then there may be some warping.

Hi
I had the same problem.
The water was leaking through the hold down bolt threads.
Used a thread sealant & it fixed the problem
Regards
Steve

SteveC wrote:Hi
I had the same problem.
The water was leaking through the hold down bolt threads.
Used a thread sealant & it fixed the problem
Regards
Steve

Ahhhhhhh that could be the problem - I just read the "land rover" workshop manual that said just what you had mentioned. Damn you Haynes, damn you again !!

Thanks - I have a new gasket and a day to work on it tomorrow

Tom

You can buy a composite gasket, they have they tin bit with a gasket material each side and are much better for sealing, talk to whoever you deal with for specialist rangie parts, if they can't help call another

all i did on my 3.5 it has the tin valley cover too is use alot of silican some tool machined the heads and never machined the inlet to match and its a serious pain to seal i just used a heap of silican and it worked its dodgy as shit but so are rover v8s

ok - well I have stopped it leaking by removing the inlet manifold bolts one at at time, putting loctite thread sealer on them and putting them back in and torquing them up - seems to have solved the water leak and the water in the sump.

I still have a couple of outstanding problems which are pretty obviously electical.

1. Car is massively overfueling - got plumes of black smoke at idle
2. Air con clutch is permenently kicked in - only goes off when you disconned the wire or pull the fuse.

The injector wiring loom was absolutley toast on the passanger side, baked by the manifold - I taped it up carefully but now looking at the overfueling problem not carefully enough - I think I might have a short between one of the injectors and the cooland temp sensor.

Air con clutch .... WTF ? that wire runs all the way around the front of the engine bay farked if I know have I have done that - will have to trace it I suppose see if it is getting a signal before it enters the engine bay and work from there .... I am resorting to pulling the fuse in the short term.

Thanks guys - any advice would be great but it looks like I am well on the way to having it fixed.

Cheers
Tom

good luck mate

460cixy wrote:good luck mate

Sorted it

Was a silly mistake that is expensive in the end ..... blown ecu

I earthed out some of the sensors when I was stuffing about with the loom where it had been baked and all the wiring insulation had gone hard, cracked and fallen off. I have just got 10 injector plug ends now and I am going to remake that entire section both sides.

I swapped in a mates ECU and she was purring .... now I just have to get brand new secondhand ecu.

Silly mistake - I was sure I had the ecu unplugged when I was working on that but obviously not

Thanks all
Tom

oh well least it was not hard to track down i hate electrical work

460cixy wrote:oh well least it was not hard to track down i hate electrical work

Yep - it is not the worst outcome, at least it is an easy replacment and I don't have to full that farking manifold off again !!!

Tom