As just an amateur mechanic, I have certainly heard of bore wash. Don’t recall seeing another case study like this. Thx for the video. I’ll add that to the factors to consider for loss of compression. 👍🍻
I love the XJ, it so cool! And they’re for some reason not til expensive. One of my first drives in a classic car was a 1969 XJ 4.2 and it was such a cool experience. Nice fix by the way! I have heard of bore washing before, but never realised that it could cause loss of compression to an extent where the car wouldn’t start. So it would not have been something that I would have checked, unless I had googled it like you. Well done! Practically a free fix - the best type of fix!
A friend of mine had an XJ12. It's hard to believe how big the motor is in that model. It bent an engine stand. Very nice touring sedan I must say, incredibly quiet even at 100 mph.
The worn out engine in my old RX-7 used to flood once in a while. To get it to go again I would remove the spark plugs, crank it with the throttle to the floor (flood mode) until it quit spitting fuel out the side, squirt some oil in the plug holes, crank it a bit more, put them back and go drive it hard for a while.
my limited experience of V8 in the Range Rover classic is that there is no engine rock or apparent torque reaction when cranking. This may be due to the opposing compression on opposite cylinder banks so don’t be surprised when cranking that the engine feels smooth. To me it sounded and looked like the cranking speed was a bit low and by increasing the compression with oil may have masked this actual issue being too slow cranking. The effective cylinder pressure is a direct result of speed and therefore if a bit too slow she won’t create enough compression. Perhaps the battery, earthing or starter motor need investigating?
I think that the problem was more likely the hydraulic tappets. Where the car had sat, the oil drains from them and causes the 'low compression' symptoms you could hear. Eventually, through cranking on the starter, the oil pressure comes up, charges the tappets and the valves open sufficiently, allowing the engine to start.
I came looking for this comment (as an amateur). However if the owner had tried and tried, hydraulic lifters would have solved themselves. My theory is a combination of both.. maybe
The Volvo 850 and other early 5 cylinder engines can suffer from this. Usually called lawnmower syndrome. Tappet jacking has also been mentioned and this can happen too.
The AJV8 was a brilliant engine that only recently went out of production. (Replaced with the Ingenium inline 6 and a BMW engine) There was a V6 variant that used the same block with the rear two cylinders blanked off and shorter cylinder heads.
Nice change even tho i am not a luxury car kind of guy, looks like owner justneeds to use it more and do motorway runs just to keep things in working order, mind you he probably needs to own a petrol station.
Certainly was something different, but an oddly easy fix, not being into Jags myself I'd not heard of this fault with them, but, with the thought of fuel geting past the rings, it would definitely be a good idea to replace the oil, it's probably been thinned out by the fuel and not helping matters... :)
I really like the jags from this era. I don’t remember the exhaust being so loud, though. This could be due to positioning of microphone, but since you mentioned the sound level yourself, I’d have to guess that the exhaust is leaking or aftermarket. It’s not a bad sounding engine, but I’m not sure it suits the car being that loud.
It's a Jaaaag. Nikasil, a type of silicon carbide, has been a problem for BMW too, over the years. Lower octane fuels apparently are worse at causing the damage and i don't know if the new E petrol with added ethanol is bad for the bore linings?
If it is often run for short durations, could two stroke oil in the fuel help? It will of course be bad for the cat (no pun intended) but I bet it’s cheaper changing the cat than rebuilding the engine. I know Mazda rotary owners do it to prolong the life of the engine.
No it’s definitely a 4.0 ltr Seppo , Jaguar put 3.2 ltr emblems on bodywork so buyers, drivers would be impressed with the power of a lesser engine 😂, very crafty those devious British.
I thought they only done that with the press cars, put the biggest engine in a higher state of tune and pass it off as the 'normal' one. TVR was famous for this.
I remember being plagued by the Peugeot prats here in town as they liked to really tailgate you, so out in my then XJ40 lights changed so I put the brakes on hard stopping instantly and this colossal clang from behind as this tailgating pug idiot ran up the back of me... Jaguar didn't even suffer a graze on the solid bumper or rubber... front of Peugeot was written off... oh dear ;)
