Coolant loss D2, V8, next chapter

[GJP]

Coolant Loss D2, V8, next chapter.

What I thought was the water pump (bearing) leaking it turns out that it seems it is the timing cover. this is the first time I have heard of this?

The matter seems to be corrosion, although it has never had aything else other than the correct quatities of OAT coolant and de mineralized water.

Any others with this experience?

I was unaware the timing cover was a route for the coolant path?

Any experince with this matter would be appreciated.

Regards,

GJP

[bee utey]

Coolant Loss D2, V8, next chapter.

What I thought was the water pump (bearing) leaking it turns out that it seems it is the timing cover. this is the first time I have heard of this?

The matter seems to be corrosion, although it has never had aything else other than the correct quatities of OAT coolant and de mineralized water.

Any others with this experience?

I was unaware the timing cover was a route for the coolant path?

Any experince with this matter would be appreciated.

Regards,

GJP

The coolant passes through the timing cover from each bank of the engine to the water pump! OAT coolant is able to find the tiniest leaks, and as gaskets age and weaken it just needs the cover off and be re-gasketted one hopes. All gaskets will eventually leak on a Land Rover...:cool:

[ramblingboy42]

All gaskets will eventually leak on a Land Rover...
now where did you get that idea from?

[GJP]

This isn't from a gasket, this is corrosion.

regards,

[PhilipA]

IMHO it is pretty/very unusual as the coolant should stop corrosion in that area. AFAIR this topic has never been raised on the forum in the 10 years I have been on it.

It suggests that there has been a period with old coolant or none or maybe a flaw in an individual timing case.

What is the implication? Do you need a new timing case? Are you concerned you are being fibbed to? I have been around older V8s and the only real problem they had was that they would erode at the rear of the water pump after many years, but the D2 is a different case.


although it has never had aything else other than the correct quatities of OAT coolant and de mineralized water
Have you owned it since new?.

Regards Philip A

[clubagreenie]

They do corrode on the pump side of the cover, behine the impellor. Cavitation causes pitting and eventually eats through. We used to either fill with davcron filler or weld and ceramic coat to prevent it happening again. It's accelerated if the wrong coolant is used and happens in both the earlier designs (2.5/3.9) and later D2/P38 designs.

The "timing cover" covers the chain/gearset behind and also allow for coolant flow from the heads to the pump and out to the radiator.

[V8Ian]

This isn't from a gasket, this is corrosion.

regards,Devcon will fix it.


ITW Devcon | Devcon Brand | Epoxies (http://www.devcon.com/products/products.cfm?brand=Devcon&cat=Epoxies)

[GJP]

Thanks Phillip,

Yes I am very surprised, I have had the vehicle for 6 years, previously a corporate vehicle with full logbook dealer servicing. I have maintained the coolant (Nulon OAT) fastituously. I would have thought the waterpump would have given out as a bit of a fail safe engineering.
I have now located another cover and the vendor advised they have come across this matter on previous occaisions, so clearly this thing can and does happen.
I take your note with repair options and trust others do as well.
Cheers,

GJP

[clubagreenie]

As an option prior to fitting have it ceramic coated on the water side to prevent any further events.

[RoverP6B]

clubagreenie wrote,...
They do corrode on the pump side of the cover, behine the impellor. Cavitation causes pitting and eventually eats through. We used to either fill with davcron filler or weld and ceramic coat to prevent it happening again. It's accelerated if the wrong coolant is used and happens in both the earlier designs (2.5/3.9) and later D2/P38 designs.

I am pleased that it never happened to my engine,..3.5 RV8. I used to use SQ36 which was changed every 12 months as it had to be and I used to use Sydney tap water too. For the last couple of years up until 2007 when the engine was retired after 327,000km I had been using Tectaloy, no problems there either. The only mark on the face of the timing cover was a slight groove courtesy of a failed waterpump bearing on one occasion.

Ron.

.