Fossicker
V8 Engine Failures
I found this link rather interesting. Apologies if it's been done to death.
JE Robison Service — the blog: All you ever wanted to know about . . Land Rover V8 Engine Failures
Cheers
LordRover
SupporterWhile a lot in that article is true, I think it does over play some of the issues - the last paragraph of the article would seem he has an interest in scaring people as he as a solution to sell.
In my view the issue is overheating - let the engine overheat and you have issues but if your engine does not overheat the engine - even 4.6s - then your engine will probably be Ok.
Nevertheless an interesting read.
Garry
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
Master
The article talks about the "slipped liner"problem only existing in the later models, (4.0 & 4.6 litre), but I know of at least two 3.5 litres that had the problem, my '77 RRC and my mates '86 RR Vogue, both 3.5 litre RV8's, (there must have been many more).
Both of those slipped liners and the repair shop that rehab'd both engines said that they had seen quite a few, and that was in the early '90's, there was not a 4.0 or 4.6 in sight. My RRC certainly never experienced the water in oil or vice versa, nor did the Vogue, so I don't know what he's on about, because the engine is a "dry" liner I cannot see how that may happen unless of course the block casting has cracked in behind the liner. Both our engines still ran great and the only indications of trouble was the tap-tap-tapping of the offending liner as it slipped up and down.
The author of the article takes credit for the advent of the"flanged liner", maybe in America, but motor engine reco shops no matter where are a pretty resourceful/inventive lot and I have no doubt that others would have thought of that particular solution. Gaz
Major part of the heart and soul of AULRO.comMoved to Tech Chatter as it's not Disco 1 specific.
Ron B.
VK2OTC
2003 L322 Range Rover Vogue 4.4 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA
RIP Bucko - Riding on Forever
YarnMaster
My 3.9 has never over-heated but a liner slipped at about 250 000km.Originally Posted by garrycol
Contrary to the article, it has never lost water in the 15 000km since and it still runs very well. One day the top-hat liners in the shed will get fitted!
AT REST
Cast aluminium is a material that has characteristics that lead to fatigue failure. It expands 2.5 times as far per degree C temperature change than iron. So it isn't the overheating per se but the cumulation of hundreds of heating and cooling cycles (their size and number) that leads to fatigue failure. Some time ago I did a back of the envelope calculation based on the difference in thickness around the cylinder liners of the 3.5 block vs all the bigger bore types. In essence the 3.5 block should last around 3 times as long before cracking the block, without an actual overheat, all other factors being equal. That puts the average life of a 3.5 block up above 700,000km rather than the typical 250,000km of the bigger bore motors. In that time a 3.5 may warp enough (a slightly different problem) to loosen a liner without actually cracking.
Basically the shortest life for an alloy block is to rack up its life in a lot of short commutes. Using it predominately for long distance touring will considerably extend its life so long as it doesn't overheat due to a stick through the radiator. A lower temperature thermostat may extend its life so long as the cooling system can hold the lower temperature but your fuel use will go up to match.
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