Frozen Engine ?!
#141
#142
I don't believe adding heated air would solve the problem. The supercharger is already doing that while under boost. If we use the explanation given by the Minnesota dealer that ice is forming at the outlet, combined with the analogies of wings, windows and ice water, more hot air should produce more ice.
Instead of 'more heat', I'd suggest again 'less cold'. If we accept the first dealer's explanation of condensation in the IC, then it makes sense to reduce the cooling effect it has on the supercharged air.
Instead of 'more heat', I'd suggest again 'less cold'. If we accept the first dealer's explanation of condensation in the IC, then it makes sense to reduce the cooling effect it has on the supercharged air.
Anyway, I decided to remove the intake snout and allow the air to be sucked in from behind the radiator (see photos). The temps aren't supposed to get in the single digits any time soon, so hopefully I won't have to deal with this for awhile.
#143
#144
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#145
well then, what is happening?
I only posted my thread to the TDI's having issues with the freezing intercoolers because it is a somewhat similar issue; like the fords.
Similar things do happen.
IT just seems to have to be the 'just right' atmospheric conditions or we would probably be seeing it all the time.
I only posted my thread to the TDI's having issues with the freezing intercoolers because it is a somewhat similar issue; like the fords.
Similar things do happen.
IT just seems to have to be the 'just right' atmospheric conditions or we would probably be seeing it all the time.
#146
well then, what is happening?
I only posted my thread to the TDI's having issues with the freezing intercoolers because it is a somewhat similar issue; like the fords.
Similar things do happen.
IT just seems to have to be the 'just right' atmospheric conditions or we would probably be seeing it all the time.
I only posted my thread to the TDI's having issues with the freezing intercoolers because it is a somewhat similar issue; like the fords.
Similar things do happen.
IT just seems to have to be the 'just right' atmospheric conditions or we would probably be seeing it all the time.
If you have read all these pages...then you probably see that we really don't know what is actually happening. I think we can credibly say that it only occurs in single digit temperatures when the car is driven and then parked in the severe cold for several hours.
The current "best" (and highly debatable) theory is that condensation is forming water or frost within the intake tract...although we don't know exactly where. At some time after shutdown the condensation (or melted frost) drains into the cylinders with open valves...usually towards the rear cylinders.
#147
I've followed this thread, but not really read each post of the back and forth, as having an XJ8, not something I will encounter
I agree it's still an unknown John; I was just trying to point out what reads like some people are still skeptical that it is happening at all, and that similar issues do happen with other makes.
I agree it's still an unknown John; I was just trying to point out what reads like some people are still skeptical that it is happening at all, and that similar issues do happen with other makes.
#148
The intake air goes through the throttle body and into the supercharger where it is compressed and then goes through the intercoolers and into the cylinders. These intercoolers have a radiator in them that is part of the cooling system and operates at about the same temp although there is an additional radiator and pump for this system to keep the temps under control. When it is 5 deg outside, the intercoolers are heating the incoming charge, not cooling it as they are still at about 195 deg f. It is possible that if the enigne is running hard at high rpm, the compressed intake charge may be hotter than the intercooler, in which case, it would be cooled in the intercooler. When the heated charge cools and contracts in the intake, it will release moisture and this may be part of the problem. But, leaky intercoolers have been known to occur, and this will dump coolant right into the intakes, so get them checked.
#149
#151
#154
I really love almost everything about this car - the performance, ride, looks, etc., but with only 3 Jag dealers in the State, and the closest one being over an hour from my home, no knowledgeable indie shop that I could find, and the length of time it takes for me to get parts, I'm going to move on to another manufacturer.
#156
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#158
Just saw this now and thought I'd give my experience as we are heading into winter again. I would be the one with the STR mentioned with the frozen starter. Happened to the wife after a massive snow storm. They had cleared out our parking lot but left a nice big wall of snow behind all the cars. Needless to say, backing out she packed the undertray with snow, drove to work, melted it, it sat and froze = starter no work! (I know unrelated to this) However, as someone who lives in the great white north (not uncommon to see sub -40 temps here for long periods of time) and drives a SC jag, here is what I have experienced over years of driving this beast all year long.
The car is always parked outside in all types of weather. Not uncommon to have to brush off a good 10in of snow or have to scrape off a coating of ice from freezing rain. Also, its never left to idle after a drive, you get home, park, car off. I have NEVER had the car not start (ignoring the frozen starter issue). It doesn't like the cold sometimes but even outside for days at -40, actually not plugged in once, turn the key and off we go. Now, after reading this thread, based on the theories put forth here, either I am the luckiest person in the world to not have had this happen (conditions this car is in is ideal for this to occur) or maybe something else is going on. Also, I have had my aux coolant pump fail, in winter, as well as the intercooler pump and still, no issues (other than the MIL for a failed IC pump). Also, I know Minnesota does get pretty cold, even can be as cold as here, but our dealer here in Winnipeg never seems to have these issues with the SC jags (I know, very small sample size). I have even washed the car on those days that no human should be out in and never had any ice issues in the engine.
I am not an engineer by any means and never liked physics (Microbiologist actually), but based on my experience, it sounds like something is broken or not working right to cause these issues (maybe I'm completely wrong though, it has been known to happen).
All this being said, I came across this thread because I'm looking to buy a 08 XJ Super V8 and started reading up on them. Now, when I do get my hands on it, likely before this winter, maybe the water getting in will be an issue, but considering the car I'm looking at is at the local dealer, with a good number of miles on it (145Km), I doubt it will be an issue as it has lived its life in the Great White North as served its pervious owner without issue through several winters already. At the very least there will be someone here that can provide first hand experience about both the STR and Super V8 in a climate where neither man nor beast was meant to live in!
The car is always parked outside in all types of weather. Not uncommon to have to brush off a good 10in of snow or have to scrape off a coating of ice from freezing rain. Also, its never left to idle after a drive, you get home, park, car off. I have NEVER had the car not start (ignoring the frozen starter issue). It doesn't like the cold sometimes but even outside for days at -40, actually not plugged in once, turn the key and off we go. Now, after reading this thread, based on the theories put forth here, either I am the luckiest person in the world to not have had this happen (conditions this car is in is ideal for this to occur) or maybe something else is going on. Also, I have had my aux coolant pump fail, in winter, as well as the intercooler pump and still, no issues (other than the MIL for a failed IC pump). Also, I know Minnesota does get pretty cold, even can be as cold as here, but our dealer here in Winnipeg never seems to have these issues with the SC jags (I know, very small sample size). I have even washed the car on those days that no human should be out in and never had any ice issues in the engine.
I am not an engineer by any means and never liked physics (Microbiologist actually), but based on my experience, it sounds like something is broken or not working right to cause these issues (maybe I'm completely wrong though, it has been known to happen).
All this being said, I came across this thread because I'm looking to buy a 08 XJ Super V8 and started reading up on them. Now, when I do get my hands on it, likely before this winter, maybe the water getting in will be an issue, but considering the car I'm looking at is at the local dealer, with a good number of miles on it (145Km), I doubt it will be an issue as it has lived its life in the Great White North as served its pervious owner without issue through several winters already. At the very least there will be someone here that can provide first hand experience about both the STR and Super V8 in a climate where neither man nor beast was meant to live in!
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JagV8 (10-03-2014)
#159
Just seeing this thread for the first time myself, very interesting read. Halfway through my thought was "why not cover the radiator?" then saw this was discussed as well.
Been a very long time, but anyone remember back in the day car owners would cover the radiator with cardboard to try and get extra heat in the car (40s, 50s cars). My thought would also be that this would keep the engine bay warmer (not the engine coolant). In cold weather, most cars do not even use the radiator, as the heater core can provide all the cooling necessary for the engine. In single-digit temps, I imagine it may not even reach full operating temp with the heater core struggling to keep the interior warm. Blocking 75% or 90% of the rad might be just what it needs. Though I agree, keep a watch on the ECT with a scan tool or similar to ensure you're not overheating on the highway (doubtful that would happen in 5F temps).
Been a very long time, but anyone remember back in the day car owners would cover the radiator with cardboard to try and get extra heat in the car (40s, 50s cars). My thought would also be that this would keep the engine bay warmer (not the engine coolant). In cold weather, most cars do not even use the radiator, as the heater core can provide all the cooling necessary for the engine. In single-digit temps, I imagine it may not even reach full operating temp with the heater core struggling to keep the interior warm. Blocking 75% or 90% of the rad might be just what it needs. Though I agree, keep a watch on the ECT with a scan tool or similar to ensure you're not overheating on the highway (doubtful that would happen in 5F temps).