[whitbomb07]

Hi guys

Whilst returning from my NYE celebrations on the Sth NSW Coast I ran into some temp issues with the Inlet Air Temp.

I'd just started climbing the hill just outside Wollongong (can't remember the name maybe Mt Ousley?, but if you know the area you know which 1)

As I started the climb I checked the cars outside air temp which was 32C. IAT was Mid 50's, as I began the climb (I had been at a stand still, so also needed to accellerate) I watched in alarm as the IAT climbed very quickly into the 70'sC, at this point I decided action needed to be taken and started to slow from the posted speed limit of 80km/h. By this stage IAT reached 80 for a few seconds before dropping, as I continued at 60km/h ish in 3rd IAT hovered around 77C. Not happy with this I pulled over and let the car idle until it had cooled down to low 60's. Continuing on in third at around 60kmh (trying not to work the turbo temps) hovered around the 70C mark until I reached the peak.

I don't have any performance add ons etc etc, just the SG.

Climbing up Lapstone Hill (which isn't really much of a hill) ambient air was 35C, IAT was 51C, by the top it was 68C.

I'm starting to think a new and better IC might be required to get through summer as I'm not liking how this is going.

I post this as warning to others of the dangers of what can happen with a bog standard CRDi engine. If the engine was chipped I really don't want to think about the possibilities.

The other scary things is someone without a SG wouldn't even realise that this was occurring!!! I'd hate to think what may have happened if I didn't have the SG and had just blasted up the hill the whole way at the speed limit......... Melted i30 anyone??? 

Please be careful everyone!!! Especially keep this in mind if you are thinking of getting a tuning box etc etc.

Regards

Daniel

[Dazzler]

Hi W.B .. I would be interested to see Thumpers reaction to this (and any of our other tech-heads)...Bunyip perhaps???

[whitbomb07]

Hi W.B .. I would be interested to see Thumpers reaction to this (and any of our other tech-heads)...Bunyip perhaps???

Hey Dazz

Ditto. I forgot to add that.

Could someone who actually knows what they're talking about elaborate on my observation/experience? I'm not that mechanically minded. But there are some things that at least get my alarm bell ringing......

Thumper has been raising this issue that it COULD happen and to keep it in mind, now I seem to have the evidence to back his warning up.

It is quite frightening to me what could happen if things do go bad for anyone.

One very big question is: Who would be liable for the damages that this could cause to the engine? Hyundai or the driver? Hyundai have not provided a means of warning the driver of this issue (except maybe for water temp) But what's to stop Hyundai turning around and saying it's operator error/car not treated properley etc etc?

This might be worth writing to Hyundai Australia and asking their viewpoint on the matter and if maybe a more 'Australianised' version needs to be made to deal with these scenarios.........

Regards

Daniel

[Thumper]

As I've said here: https://www.i30ownersclub.com/forum/index.php/topic,1066.msg13940.html#msg13940

I have seen up to 86 degrees C on a serious hill climb in 36 degree C weather.

Though, with torque booster on, you are less likely to 'keep the boot in' as it were with the extra grunt down low!

Normally I see around 70-74 degrees C when climbing steep hills (Clyde and Brown) during summer weather. (This is keeping the revs below 2,500rpm at all times. Any higher and I just induce wheel spin in 1st, 2nd and 3rd)

I've read on some forums that the Nissan GTR boys experience up to 100 degrees C on the inlet side when they run extra boost! (Scary thought)

Did you feel the engine/throttle get rather 'doughy' when the temps rose? 

[whitbomb07]

As I've said here: https://www.i30ownersclub.com/forum/index.php/topic,1066.msg13940.html#msg13940

I have seen up to 86 degrees C on a serious hill climb in 36 degree C weather.

Though, with torque booster on, you are less likely to 'keep the boot in' as it were with the extra grunt down low!

Normally I see around 70-74 degrees C when climbing steep hills (Clyde and Brown) during summer weather. (This is keeping the revs below 2,500rpm at all times. Any higher and I just induce wheel spin in 1st, 2nd and 3rd)

I've read on some forums that the Nissan GTR boys experience up to 100 degrees C on the inlet side when they run extra boost! (Scary thought)

Did you feel the engine/throttle get rather 'doughy' when the temps rose? 

Yeeeshhh 86!

The last 2 days it's been 'doughy' with the weather the way it is. Fuel consumption was up, Engine Load was higher and loaded up quicker. Responsiveness was down.

Overall very yuck unfortunately, I just don't want to find out what happens if we have any 40C days...........

Thumper what are the overall implications of the temps getting this high? Worn parts, early life failure, catastrophic failure, melting etc etc?

What point (temp) should we be drawing the line and making sure we do not exceed?

I really don't want to break my poor baby........... Whilst this isn't my 1st car, it's my 1st NEW car. Being 21 it's a rather big thing to me.

Thanks for the help so far.

Regards

Daniel

[Thumper]

Ok, not taking what I say as gospel, and please do not hold me accountable, but from what I've read on the net, some turbo diesel engines will receive up to 180 degrees C in the inlet manifold (After the turbo)

The 'doughyness' you feel is the ECU retarding the engines power output to help protect the engine/gearbox/turbo.

Best thing you could have done was to drop speed, and engine load/rpm but kept moving forward to help force fresh cooler air through the front of the vehicle and through the intercooler. In all seriousness I would not have worried in your instance.

If temps rise too far for the average owner, power is reduced. Continual driving in an aggressive manner will result in further reduced power output and possibly going into limp home mode, whilst the 'Check Engine' light would illuminate. Once the ECU goes into limp home mode, you are automatically forced to drive at a very much reduced speed.

Sounds like the Caltex Vortex with it's higher Cetane rating helped avoid any issue during the hot weather. 

High inlet temps won't do an awful lot to an engine, other than reduce available power and decrease economy. It is always preferable to keep the intake temps down if possible, but turbos are designed to work in very hostile environments (don't forget one half of a turbo has VERY hot exhaust gas flowing through it - anything up to 800C), so it isn't likely to have a problem.

The only thing to worry about in this sort of situation is to make sure you don't just switch the engine off immediately after a run that causes these high intake temps. The car needs to be cooled down before switch off. Ideally, about 10 -15 minutes of driving at around 60 km/h or so on level roads before switch off, or if you can't do this for whatever reason, then at least let the engine idle for a few minutes.

I have been driving a turbocharged sports car (Nissan 180SX) for the past 5 years and the car has been used and abused daily (it has done over 145,000 Km's now) and have not had any trouble with the engine or turbo. As long as good quality oil is used and it is always changed regularly, any modern turbocharged car will live a long life.

[Dazzler]

Or you could just move to Tasmania (can't remember the last time we had 30+c on the north west coast of Tassie)

I have a sneaking suspicion that the temps you have experienced are within the safe limits.  I also suspect that should the safe limits be exceeded, as Thumper suggests, the ECU would react and a limp home situation would result.

I've also started to read a bit about intercoolers sinceseeing this thread.  Found this interesting article http://autospeed.com/cms/A_109423/article.html?popularArticle .  I was really interested in the differences in turbo boost between diesel and petrol and the design requirements for each intercooling system.

I'm sure there are more interesting articles and explanations on the www that will give us clues as to how to treat our little diesels in different driving conditions.  I concur with Thumper that the best thing to do if the intake air temp (post intercooler) begins to rise, is to lessen the boost, drive more conservatively and give the temp a chance to come back down.  It would be important to keep the air flowing through the intercooler.

Remember, if it weren't for the Scanguage, we would be oblivious to this rise in temp and would be relying on the i30 ECU to do its thing.

Safe driving,

Bob

[whitbomb07]

Thanks for all the replies guys.

Looks like I overreacted a little, but I'd rather do that than risk damaging my car. This thing has to last me quite a few years.

Cheers

Daniel

[bumpkin]

Or you could just move to Tasmania (can't remember the last time we had 30+c on the north west coast of Tassie)

Failing that move to the UK, guaranteed to generally be at most in the mid 20s and average about 10 deg C, I'll take my chances with your temps in my petrol version..........up for a swap????

[Lakes]

Daniel, i would not worry too much, like Thumper say's just keep the rev's below 2,500.
i would expect that if you keep the rev's down and keep the car moving, it would cool faster as the wind would help cooling, like for every hill you climb you should find you will have another hill to go down. also good quality oil made to be run in turbo charged motors works well at high temps.
i've ridden old Harleys with stroker (longer stroke than standard ) motors in temps 45 to 50, and they are air cooled & have dry sump oiling, the oil tank was under the seat. the seat was that hot was burning my butt, but i did not have a temp gauge and just kept riding, other friends with gauges were all worried about the temps. i never experienced problems.
so i think with a computerized set up would have no worries. enjoy your driving more and stop worrying.
ps i'll be down that way next weekend as will be down past Narooma for the weekend.

[LuciferDarklord]

Its been around 40 here for the last few days.  I've been standing on it up long hills with overtaking lanes - no doughyness at all.  Think of the VL turbo - no intercooler at all from the factory.  Its covered by warranty, I'm not too worried.  I'd like to think Hyundai engineers did some hot weather testing and the size of the cooler and ECU logic is enough to keep everything in check.  Just my opinion!

[simon]

5 year bumper to bumper warranty - enjoy your car I say 

[Thumper]

On the way home today, outside temp around 42-43 degrees C.

Intercooler temp went up to 95 degrees C and water temp went up to 106 degrees C when I had to climb a long hill, overtaking seven trucks. 

It blew heaps of fuel smoke (Solid black) out the back, constantly, during the overtaking.

Interesting thing is, this is totally stock (Stock exhaust, stock fuel maps)

On the weekend I found that a free flowing exhaust and economy fuel maps actually run cooler than everyone else who is stock. Go figure.   

[blawler]

That actually makes sense. With the mods the car is running more efficient. Its not needing to run as hard. Therefore runs cooler. And the intercooler stays cooler, therefore generating more power..