I go Dino. T5 is the blend, T6 is full synth. I just use plain jane dino

 

I'm not guessing at all.


On the front end, it is the front seal, period. I have cleaned, wiped degreased, power washed etc etc several times. The leak comes from behind the pulley at the base of the front cover where the crank snout protrudes through. I can see it clearly. There is no appreciable leak anywhere else on the front of the engine ( I know this because I have fixed various leaks including the cooler plug and the pressure sensor).


On the back end, it is leaking where the engine meets the bell housing. It is not leaking anywhere above that. It is either leaking from the rear main seal, or some other source located between the bell housing and the block.


My main question is what could cause a significant intermittent leak, that goes away on it's own over time, but occasionally returns in full effect?

 

Have you checked PCV valve to make sure it's not partially clogged,? I am sure you know when it clogs up puts lot of pressure on rear crusefix seals & when it leaks it seems if it's rear main seal,, I guess even is PCV is not totally clogged but halfway there in certain times it might cause extra pressure on seals & cause a little leak,,
The Land Rover PCV valve is not the best design & causes problem every now & then, I changed mine with a fram unit that has an actual valve in it (I read it on one of older treads). It was one of best suggestions, because it will almost never fail & real easy to clean if necessary,,

 

This is kind of where I was looking. It makes sense that it would be intermittent. Is there a quick reference or source for instructions to clean or replace the PVC valve?

 

 

Do some searching on crankcase ventilation or PCV valve. Maybe you can get some more info...

https://landroverforums.com/forum/di...anifold-76379/

 

Thanks a bunch. I just read through about 20 threads on this issue, and plan to take a shot at it this weekend.


You guys are the best!

 

If you accidentally brake the original noodle type oil separator that's inside the tube, just clean metal tube & put back on valve cover, then buy a Fram PCV valve, part # FV23 for ($3-4). Connect rubber hose to both ends & instal between original tube & manifold connection,,
That thing will never clogg, & it's really easy if need to be cleaned,,

 

I'm interested in this theme... I bought the seal sometime ago with the idea of having a mechanic replace it, but I do believe that with the right tools and a bit of encouragement, it might be a project for myself to tackle. I should be posting a thread soon seeking enlightenment for "the Front Crank Seal Situation"... any pointers now? ;-]#

 

If you search this forum for "Front crank seal replacement" or "Oil leak front seal" etc, you should find and read a lot of posts with info on fixing. You can also read the manual. You need the right tools to remove the harmonic balancer, fan. Pry the old seal out, grease the new rubber seal lip surface lightly, very carefully tap the new one in without damaging it.