So I've been reading the various threads on the valley hose and the
ones dealing with engine overheats and rebuilds such as:

https://www.jaguarforums.com/forum/x...-237554/page4/

The valley hose has been in the back of my mind since buying the Jag 5 years ago. Now
I'm worry warting a bit lol. Not got a price from Jag for doing the valley hose, but wondering if
Evans waterless coolant would put off the work?

https://www.evanscoolant.com/

 

Great question but I don't see how. Engine temp will be the same so the coolant temp will be the same or maybe a little higher if I read their specs right. To cool it faster you would need an all aluminum radiator so it will disperse the heat faster. This is just speculation on my part. Others here will weigh in. I think Cee Jay uses it in some of his vehicles.

 

I now use EVANS in my Jaguar XKR!!! I had it swapped out when all the coolant lines were replaced a few weeks ago.

The engine temps are now about five degrees warmer, but as long as they don't get to 245F you'll be fine. Even then your coolant will be okay, but your engine won't like it for performance. I used to be right around 215 going uphill at 25mph on a certain well-travelled road for me. That's with the ambient air temp at about 100F or so. NOW I see temps right around 220F on the same road, same conditions. This is at an altitude of 5300 feet.

The thing I REALLY like about it though, and the reason I use it in my P/S Mustang and now my XKR is because of the No Expansion. It's the expansion that blows out hoses, lines and water pumps. A blown line is catastrophic if expansion is present. If I'd happen to get a leak with EVANS, it'll just leak. Drops.

I also like taking the coolant cap off when hot and running. People scream at me DON'T!!! but I do anyway. Nothing happens.

EDIT: As per the above post; I WAS going to put off the small leak that turned out to be the oil cooler and not the valley plastic lines specifically because of swapping to Evans. I changed my mind. It sure was expensive to have everything replaced though, including the other four injectors and a supercharger rebuild and such.

 

IMHO waterless coolant is like STP in the 60s. Use the proper Jag recommended stuff, none of us are more clever than the engineers designing the car.

 

Engineers are throttled by the accountants, or otherwise these things would be $3,000,000 ultra-cars.
Use the cheapest thing that works okay. Basic economics.
Besides, Evans wasn't even a thing when these bricks were designed in 2004.
OR, are you saying that advanced technology isn't as good as the twenty year old stuff of yore? In that case, we'd be using whale oil and 60 octane mud-gas.

Are you still using leaded paint, asbestos and DDT? Those were designed by engineers also.

 

I'm not against progress at all, and engineers do so much making our lives easier, but some ideas are great, some are not. The great ones soon get adapted by the manufacturers, and if waterless was better/safer for an engine, don't you think the premium brands would use it? There's probably a good reason they do not, it's inferior technology, one of the millions of inventions that just didn't have the superior properties needed to replace the old tech.

Some quotes from a pro/con site on dr. google, don't ask me to prove them right, but I would never, as in NEVER, use waterless in my cars:
.Engines typically run hotter at the cylinder heads.
.a small dip in the horsepower possible from their engine. Some high-performance engines see a drop of 5% or more
.fuel octane requirement for the engine increases by up to 7 points

 

i see your point No Quarter but i don't think it takes engineering knowledge to see that it probably wasn't an explicit engineering choice to rule out this possible use case. that list of issues would be terminal for an economy car but i'm pretty sure we've already paid for enough engine such that those don't apply, in context.

plus we already know there is just the one variable that we have to measure, the coolant temp. how is it going to break down the oil and/or misfire and/or knock all the way to death without any coolant temp warning? by way of example if you were worried about normal operating temp being 215 yet regularly operating at 220 when we know the emergency number is 245... wouldn't you just change your oil more often? and wouldn't you still just change your oil more often even if you were doing that with spec coolant? it's heat, it's all the same.

 

Regardless of head temp, octane requirements and whatnot, the BIGGEST benefit to me on BOTH my cars is Zero System Pressure. I'll sacrifice all else for that one characteristic.

 

I'm going to email the Jag dealer for a quote on replacing the 3 valley hoses - I'm thinking
it isn't gonna be cheap.I think the Evans is a good idea but at some point one of those
hoses is going to to fail although with the Evans coolant there would be less possibility
of engine damage.Those hoses are around 13 years old.

The ones that are easily inspected seem to be in good condition though.

 

Mine was $6000, but I had some other stuff done since everything was blown apart already.

 

Yikes, I'd be happy if it comes in under 2k. Just spent a grand on the new headliner. I intend to keep the car until I croak or can't
get in there due to age. Only got 94000 kilometers on it.

 

The labor to merely remove and replace the supercharger is over $1000 by itself, or $1400 Canadian.

 

Emailed Jag dealer this morning - no response yet. Wonder how many they have done before. Not many I'll bet.

 

Coolant or supercharger removal? Or was that sarcasm? Supercharger removal's quite routine at JLR dealers as this motor has been in production for over 12 years and fitted to nearly everything they make and its removal's required for most services, that's why they always have new gaskets on hand.

 

Valley hose replacement - not sure how many they have done - I think there is a bit more than removing the SC. This is the outfit that claimed the windshield had to be removed to replace the headliner.

 

…….oh………