[V8] Oil leak 92 V8 4.2

[Dave Saad]

The "D" plug at the front of the right head (or rear of the left  
head) is a major cause of this leak - at least for me.
I would try a new set of valve cover gaskets before I went too crazy  
with head re-torquing.

There is also the "O" ring between the head and the timing gear rear  
cover half. This is the part the cam seal is pressed into. It could  
also leak I suppose, but my money is on the "D" plug and or a bad  
valve cover gasket.

Also - use a torque wrench on the valve cover bolts. Sounds like  
overkill I know - but a nice even torque across the cover gives you  
the best chance of a leak free seal without damaging the cover or  
gasket.
Same goes for oil pans and really any cover with a gasket behind it.  
I find the extra time it takes to do this is well worth the effort in  
time spent NOT cleaning up the garage floor.

I believe the torque is 7 lbs/ft. It is in the manual.


And for your Ford modular V8 (newer 4.6L and 5.2L motors) question of  
the week:
What is the correct spark plug torque:

18 lbs/ft (like any other car on the planet)
or
18 in/ft ?

Thats right kids - the spark plugs take less than 2 foot pounds of  
torque, and if you over do it you will strip out the head.

And - next time you feel like whining about how hard or expensive  
something on your V8 is - changing plugs on a 1998 with a 4.6L (the  
easy one) takes no less than 3 hours and costs no less than $300 at  
the dealer. The 5.2L motor is significantly more in both time and cost.

Dave


Which is the correct spark plug
On Sep 15, 2007, at 12:12 PM, Dag Bøsterud wrote:

> As I wrote earlier today, there was no sign of a leak when the car  
> was dismantled. We changed all the seals anyway,
> and started the car up.
> Back to square one. The oil pressure senders one the right hand  
> side of the block has been checked, and
> seems to not be the cultprit.
>
> I did take two pictures, located at the following url:  
> www.consulgranada.net/v8leak
> It will also leak at the bottom of the timing belt cover.
>
> The leak starts when the oil temperature starts to rise, and it  
> seems that the leak is bigger at high rpms than at low rpms.
>
> So to summarize:
> Changed all seals around the cams and the distributors.
> Changed the seals around the crank and the oil pump. (did see a  
> massive improvement after this)
> Oil pressure senders seems okay
>
> Any clues..?
>
> /Dag
>
> 92 V8 4.2
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