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View Full Version : V8 Engine Failure due to coolant leak



sew
5th April 2016, 06:04 PM
G'day All,

My Disco 2 V8 (2003) is now very dead. Looking for words of wisdom from the group.

The other week I had the exhaust system play up - a major hole appeared in the down-pipe assembly just beyond the exhaust manifold. I nursed the old girl home but I don't know how much abnormal stress this placed on the whole system. Lot's of noise, not much power, I would have left it to be looked at where it broke down - but a) we were in the middle of nowhere (out on the Brindabella road between Canberra and Tumut) and b) it was Easter Sunday.
I got someone in Canberra to weld up the hole last week.

This past weekend we did a camping trip - Canberra/Snowy Mountains/Canberra - the majority of the trip being uneventful. That is until the return leg, about 50KM's south of Canberra in Namadgi National Park.

The cooling system warning light (red LED) came on, rapidly followed by the car starting to sound like it was a diesel (not something you'd expect in a V8!). I was in one of those ideal locations with a cliff to one side of the car, and not much room on the other, so finding a safe place to stop took a minute, maybe two.

I don't expect this delayed response did the engine any favours. When I did manage to stop the car in a safe spot there was coolant leaking out at a rate of knots, steam everywhere - quite a sight. This wouldn't have been so bad, but it was still about a 4 hour walk to the nearest phone signal and I had my 8 and 12 y.o. with me.

To cut a long story short, we hitched a lift, the Mrs rescued the kids and left me to it!... I called NRMA, got a flatbed tow truck to come out to the car. The truck's air brake system played up, and as we had some very steep hills to descend, common sense prevailed and they radioed for a second flatbed truck to come and collect the car....time ticked by and we eventually dropped the car off at a local garage around 6pm (the original failure happened around 9am!).

An initial eyeball by the garage says there was a split hose that looked to be the culprit. Given the car has been running well for two years I'm speculating - could the stress of driving it with a breached exhaust down-pipe and/or the welding have contributed to the hose splitting? Maybe... I haven't seen which hose they are talking about yet - but from a quick look at things on the afternoon when it happened it looked like the leak was coming out of somewhere near the general area close to the water pump - and not from the radiator or any of the obvious/visible hosing.

One other thing about the cooling system that does start to ring bells - is that I have been slightly (maybe 50ML/month?) topping up the coolant reservoir over the past 6 months, whereas previously I didn't need to. I put that down to it being summer and didn't think much of it. In hindsight this might be related to the catastrophic failure on Sunday. It would have paid me to be more diligent.

The plan is for the garage to replace the split hose, refill the cooling system, run tests and then give me the news on how bad the damage is.

I suppose this could go anywhere from a replacement hose & labour or maybe a blown head gasket, all the way through to a destroyed engine.

Given 2003 V8's aren't particularly worth a great deal these days I may have to make a decision as to whether it's economically sensible to fix the existing engine, replace it with a donor engine (which itself may have problems) or scrap the car.

The rest of the car is in reasonable knick - so I would prefer to keep the old girl going, but I don't want to throw a lot of money at something that's been under a lot of stress, get into a situation where on the surface it looks like it's ?fixed? just for something else to go wrong (and cost $$$'s) a bit down the track.

I'd be interested if anyone has any indicative figures based on different scenarios (from best to worst-case) on what I might be up for?

It's my daily driver and beyond changing the oil I don't have the time or skills to do this myself - so we're talking $$$'s in labour for anything beyond a simple fix.

Oh and to top it all off? About 45 minutes before the engine failure some yahoo sped past me in the other direction on a dirt/rock track, launched a rock directly at us and made a huge crack in a windscreen I'd only replaced around Christmas time... :cool:

Roverlord off road spares
5th April 2016, 06:25 PM
With a bit of luck it might be just a case of a hose replacement, if the engine cranks over ok you might be lucky, they don't like being overheated.
A blown head gasket might over pressurise the system causing the weakest point to go, usually a hose.

I doubt welding up a pipe would have caused the hose to burst.

You say you were losing 50mm of coolant a month, that would have been a warning to find the cause where it was disappearing before a disaster.

Coolant would have left a tell tale stain at it's exit point if, externally leaking.
It might have been a leak coming from a weep hole in the water pump, warning that it was about to fail, or a hose that was iffy, or that it was going into the cylinders via a head gasket leak.

I had a expansion tank go and drop it's entire lot on a steep hill in my old D1 V8, I was lucky and the engine survived.
You might be lucky that's it's only a hose.
Cheers, Mario

Pedro_The_Swift
5th April 2016, 06:48 PM
I wonder if the diesel sound was a liner moving,,,

ozscott
5th April 2016, 07:51 PM
Might be Pedro but when I overheated my 4.0 badly is sounded like a diesel and ran on horribly after I shut the igniting off...dieseling on with the heat igniting left over fuel!! No liner shift. I still have the 4.0 and it just needs one head gasket. It has reconditioned heads and new timing gear and Crowe cam.

Whether it is worth working on depends on how good the rest of the car is and how cheaply you can see what is wrong. Even a HG job being done by a good mech at commercial rates won't be cheap.

How many k's has the motor got on it?

Cheers

sew
5th April 2016, 09:29 PM
Thanks ozscott - the motor was just coming up to 150,000KM

Road Stone
6th April 2016, 02:20 AM
Hi Sew

I overheated mine once. Not my fault, long story but it was at the begining of my ownership. The engine had 280klms on it.

I noticed something was not right when I noticed pink spray all over the back window, looked at the temp gauge, it was in the red and couldn't pull over for about another 4klms.

Lifted the bonnet, steam and a sinking heart immediately overcame me. It took 10 litres, and I drove another 200klms home stopping to check it every 50klms or so and topping up occasionally.

Shipped the car to PNG learnt all about the cooling system on the V8 and renewed ALL hoses as it can lead to soooooo much going wrong.

No damage was done, I feel I was lucky, so yours may not be all bad news. I hope not as they are truely a beautiful engine in the D2.

I agree with the above, doubt if it has anything to do with your other issue.

The only thing you can do is await the damage report and move on from there.

Good luck, Jerry

Grumbles
6th April 2016, 04:28 AM
My 3.9 overheated badly due to a failed viscous fan hub on the cooling fan. Coolant was gushing out. I carefully added water with the engine running to get me out of the bush.This fast tracked my education about viscous hubs.

Back at the independent LR mechanic all seemed well and the car ran great........and did so for the next 5000 kms but then the head gasket failed.

ozscott
6th April 2016, 04:45 AM
Yes alloy motors dont like a bad overheat (especially the 4.0) and the failure is usually a few thou down the road...which makes buying D2's from about 150k Russian Roulette as i suspect some people flog them immediately).

"
Cheers

sew
8th April 2016, 12:03 PM
Finally got news back on the state of the Disco... blown head gaskets and a warped head. One very dead engine. The quoted cost of repair is more than the car is worth. Sticking another old engine in sounds like an expensive gamble. So at this stage I think it's probably time to cut my losses and send her to the wreckers. Anyone know if there are any around Canberra/Queanbeyan who don't totally rip people off?

Pedro_The_Swift
8th April 2016, 12:06 PM
better off selling it on here,, ;)

sew
8th April 2016, 12:16 PM
Thanks Pedro - I'll give it a try and see what comes of it.

PLR
8th April 2016, 12:22 PM
Finally got news back on the state of the Disco... blown head gaskets and a warped head. One very dead engine. The quoted cost of repair is more than the car is worth. Sticking another old engine in sounds like an expensive gamble. So at this stage I think it's probably time to cut my losses and send her to the wreckers. Anyone know if there are any around Canberra/Queanbeyan who don't totally rip people off?

G`day ,

did they replace the hose and run it and then dismantle it ?

Blown head gasket you can work out assembled .

Warped head you can`t be certain .

If it`s not apart are they saying a possible is a warped head ?

Eevo
8th April 2016, 01:38 PM
do what i did, fill it up with coolant and drive it for 2 years.

lewy
8th April 2016, 04:14 PM
chemiweld,nothing to loose

Road Stone
8th April 2016, 10:52 PM
Barrs Leaks, large size for V8s? As said above, nothing to lose.


Sorry to hear the bad news.


Would you not get more money back by taking it apart and selling the bits your self?


Cheers, Jerry

Battler
9th April 2016, 09:48 AM
2 bottles of Sealup.:D

Roverlord off road spares
9th April 2016, 10:21 AM
The killer is the labour cost. If you are handy with tools and can read a repair manual like Rave you could do it for about a $1,000
That's a VRS kit and having the heads machined and maybe the valves done( depends on work shop) providing the heads are not over warped and haven't gone soft.
Cheers, Mario

Pierre
12th April 2016, 09:00 AM
And the outcome is.....?

Cheers
Pete

loanrangie
12th April 2016, 04:36 PM
The killer is the labour cost. If you are handy with tools and can read a repair manual like Rave you could do it for about a $1,000
That's a VRS kit and having the heads machined and maybe the valves done( depends on work shop) providing the heads are not over warped and haven't gone soft.
Cheers, Mario

Yep, the V8 is easy enough to work on. I have swapped HG's without lifting the inlet manifold before. At 150K the bottom end should still be good for another 100K.

ozscott
13th April 2016, 06:07 AM
I would rate the bottom ends good for well over 300k. I have an original D1 with 300k and going very strongly and i had a 4.0 D2 with close to 300k and even tbough a head gasket let go the bottom end looks like new. The RV8 blocks are known for longevity if well serviced. I think 400k plus for the bottom end is not wishful thinking. To my mind if no liner shift has occurred by 250k and barring then big overheats they are going nowhere

Cheers

Pedro_The_Swift
13th April 2016, 06:11 AM
wow, they can make a crank that goes round and round, thousands of times an hour for twenty years non stop, but cant make a liner stay in one single spot,,

Eevo
13th April 2016, 07:00 AM
[biggrin][bigrolf]:lol2:

sew
13th April 2016, 05:42 PM
As I don't have the time (or skills) I've decided to part with the old girl - it's in the market section under 'wrecking' - and will be on ebay tonight...

sew
15th April 2016, 01:18 PM
The ebay link is HERE (http://www.ebay.com.au/itm/272210444396'ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649) in case anyone is interested in a great car at a bargain price.

Road Stone
15th April 2016, 09:34 PM
Wow, what a great looking vehicle, what a shame. Someone is going to make a lot of money out of it.


Very sorry it ended this way.


Cheers, Jerry