kv6 oil leaks

genpk · 30th May 2019, 23:55

why is it all my 3 kv6 powered cars have oil leaks, seems from rear seal area
but my one diesel 75 is as dry as a bone.
Same goes for old toyota hilux ute thats done 300,000km and still dry underneath!!
Is there a design fault here??

SD1too · 31st May 2019, 07:15

Have you cleared the crankcase breather pinhole in the camshaft covers recently Peter?

Simon

genpk · 31st May 2019, 11:03

hi simon, took your advice and checked the breather holes out.
The large pipes were ok but the small one on the front rocker cover was
blocked up as when it was unplugged oil poured out.
The only one i cant get to is the rear one which is under the rear head passenger side.
It Ts of the front small pipe and has an inline one way valve.
All i know is the car seems to be running smoother by just cleaning the front one out.
re oil leaks, we shall see if it makes any difference!!

SD1too · 31st May 2019, 12:10

Quote:

Originally Posted by genpk

It Ts of the front small pipe and has an inline one way valve.

The breather hoses don't have any one-way valves Peter. You're probably looking at the vacuum feed to the brake servo there but your sentence seems to have lost some words.

I'm glad that you've noticed a difference. Did you manage to clear the small pin hole in the LH bank camshaft cover without removing it? The RH side requires removal of the plastic manifold chamber.

Once done though, your engine should magically gain a few bhp!

Simon

genpk · 31st May 2019, 12:52

As far as i know there are four breather holes on the rocker covers.
The two larger pipes (one near the vis and one on the front cover)
and two smaller pipe ones( one on front and one rear under the manifold passenger side which is the one i cant get to.
i would think maybe removing the battery box might be able to get to it but not sure.

vitesse · 31st May 2019, 13:34

Yes the rear one is a pain to get to. Trouble is, if you just poke the smaller holes clear then the debris ends up trapped between the gauze filters and the outlet holes, suction will then probably once again trap the debris and block the holes (unless twist drill perhaps). Only sure way is removing the cam covers and if you remove the upper inlet manifold to clear the restriction then you’re halfway there.

Regards

30th May 2019, 23:55	#1
genpk Posted a thing or two Rover 75 Saloon MGZT Join Date: Jul 2012 Location: Perth, AUSTRALIA Posts: 1,664 Thanks: 3 Thanked 461 Times in 299 Posts	kv6 oil leaks why is it all my 3 kv6 powered cars have oil leaks, seems from rear seal area but my one diesel 75 is as dry as a bone. Same goes for old toyota hilux ute thats done 300,000km and still dry underneath!! Is there a design fault here??

31st May 2019, 07:15	#2
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,382 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Have you cleared the crankcase breather pinhole in the camshaft covers recently Peter? Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

31st May 2019, 11:03	#3
genpk Posted a thing or two Rover 75 Saloon MGZT Join Date: Jul 2012 Location: Perth, AUSTRALIA Posts: 1,664 Thanks: 3 Thanked 461 Times in 299 Posts	hi simon, took your advice and checked the breather holes out. The large pipes were ok but the small one on the front rocker cover was blocked up as when it was unplugged oil poured out. The only one i cant get to is the rear one which is under the rear head passenger side. It Ts of the front small pipe and has an inline one way valve. All i know is the car seems to be running smoother by just cleaning the front one out. re oil leaks, we shall see if it makes any difference!!

31st May 2019, 12:52	#5
genpk Posted a thing or two Rover 75 Saloon MGZT Join Date: Jul 2012 Location: Perth, AUSTRALIA Posts: 1,664 Thanks: 3 Thanked 461 Times in 299 Posts	As far as i know there are four breather holes on the rocker covers. The two larger pipes (one near the vis and one on the front cover) and two smaller pipe ones( one on front and one rear under the manifold passenger side which is the one i cant get to. i would think maybe removing the battery box might be able to get to it but not sure.

31st May 2019, 13:34	#6
vitesse I really should get out more....... Rover 75 Saloon Join Date: Jul 2011 Location: Gävle Posts: 2,537 Thanks: 395 Thanked 823 Times in 652 Posts	Yes the rear one is a pain to get to. Trouble is, if you just poke the smaller holes clear then the debris ends up trapped between the gauze filters and the outlet holes, suction will then probably once again trap the debris and block the holes (unless twist drill perhaps). Only sure way is removing the cam covers and if you remove the upper inlet manifold to clear the restriction then you’re halfway there. Regards