AIR CONDITIONER DELETE

[993]

Hi there!
Does anybody have done it?
Will It improve engine temperature?
I know its crazy but removing the front air con radiator It should give moré fresh air??
thanks in advance

 

[gsxr]

There will be very little difference, if any, compared to simply not turning on the AC. I wouldn't remove it unless you needed the space for an intercooler on a supercharger installation and lived in a very cool climate.

 

[500AMM]

Hello.

The car is designed for the highest ambient temps on the globe (..where it is roads and meant to drive), so if you have cooling issues it is other reasons.

However, from a technical view you have to compare the temps between the engine cooler and the AC cooler; the engine can flow max 120 deg. through the cooler, while the AC transport the inside cabin temp. through it's cooler, between 25-50 deg? (my guess). If the AC cooler has lower temp. than ambient air temp., which may be actual in hot areas, it will in fact assist by pre-cooling the air a bit. I hardly believe that removing that small AC cooler will add any noticable effect on the air flow and cooling, if so why did MB place it there?

You have a nice stable of cars. What is your first name?

Cheers

 

[Jelmer]

If you think your AC radiator holds back too much air, you should first try to clean it using compressed air.

For the rest, I agree with Arnt. I've learned the hard way that looking for solutions this way will be costly and inefficient. If your engine is running hot, there's most likely another issue.

 

[993]

Thanks for the info!
My first name is Paul.. I'm preparing the owners presentation with my new monoblocks aero1 18" from RH

The problem I have with the engine temp is mostly at highways,, between 20/30 deg outside the car stays at around 90 to 100 deg engine temp,, the weird thing comes when I aproach a hill (around 10 percent) the car goes from 90/95 to 100/105 no matter what speed.. When I cope the hill I release gas for about 10 seconds and the engine temp will drop to 90 or so..
I think this car has very sensible engine temp going up or down the hill... That is the reason on deleting the air con (i don't usually use this car on warm temps so i don't really need the aircond)
The thing changes a lot if we are talking about cooler outside temps (7/17 deg) on that case the car would never touch the 100 deg on highways, maybe 90/95 on hill climbs..

Around town temps are between 95/100 and sometimes 105, when the aux fans kiks on,, then the temps goes down quickly to 100..

Another thing that I'd tested was turning the heater while driving at 100/105 deg on a warm day.. The result was droping to 92/95 thats it..

Does all this things sounds familiar??

 

[bing]

Hi Paul! A lof of this sounds normal to me;

temp going uphill - normal due to underload
release gas, going downhill temp drops - normal no load
Around Town 95/100 and sometimes 105, aux fan kicks in - normal stock activation
turning heater on results dropping temp 92/5 - normal as you're releasing heat from system

Sayin that, have you serviced your cooling system lately, such as Thermostat, coolant flush/changed etc? I'm sure our Cool expert "Jelmer" will chime in on this. He's been to the moon and back with this kind of issue

 

[993]

Thanks Bing!
I've change recently the engine radiator (OEM) but not the thermostat..
I changed the radiator because the old one was repaired and it didn't inspired me a lot of confidence (to be honest I didn't feel any difference on engine temps between the two radiators)
Also have new coolant liquid from Wurth (the mecanic told me the coolant liquid was very dirty, brown..)

 

[Jelmer]

Hah, yep, been there done that. Agree with T-Stat, though I'd first check the viscous fan... It should've been engaged at those temps and roaring the temps down like crazy.

The best advice I can currently give: don't make any rash decisions like ripping out the A/C radiator, changing the waterpump, etc. Try to give us some more information, check components, etc. If you start just "replacing stuff" on these cars you'll spend so much money that you want to get rid of the car after a short while!

Looking forward to seeing your owners thread!

 

[bing]

Paul, I'm not sure if Wurth coolant is suitable but if possible, get MB or Zerex G05 . Also , and possible among other bits later, you should replace the t-stat if you're not aware of it being replaced .

Here's Jelmer's trip to the moon :

http://www.500eboard.com/forums/showthread.php?2160-Still-running-too-hot/page5&highlight=running

Sit down with a cup coffee, a note pad and pen, you'll pick up a lot of pointers here.

 

[993]

Ok! I will replace the T-stat to start with..
I have the last owners bills and I remember that the viscous fan was replaced 5 years ago (pretty expensive bill I remembered)

Thanks Jelm&Bing!!

 

[500AMM]

Paul, I'm not sure if Wurth coolant is suitable but if possible, get MB or Zerex G05 . Also , and possible among other bits later, you should replace the t-stat if you're not aware of it being replaced .

Here's Jelmer's trip to the moon :

http://www.500eboard.com/forums/showthread.php?2160-Still-running-too-hot/page5&highlight=running

Sit down with a cup coffee, a note pad and pen, you'll pick up a lot of pointers here.

Ok! I will replace the T-stat to start with..
I have the last owners bills and I remember that the viscous fan was replaced 5 years ago (pretty expensive bill I remembered)

Thanks Jelm&Bing!!

Hi Paul.

Just as both Bing and Jelmer says - that thread about Jelmers fight with the cooling is very informative. The waterpumps are very durable on the M119, but it depends on the mileage on the car of course. A thermostat change is a good start, let's hope it makes a difference.

Btw, thanks for using your first name.

Cheers
-arnt-

 

[993]

Thanks Arnt!!
Lets see how it goes..

 

[gerryvz]

I have found in 30+C outside air temperatures here in Texas summers, that NOT running the A/C system lowers the engine temperature perhaps 3C. It's not much and not even 5C lower.

 

[Jelmer]

That actually makes sense. If "we" run the A/C, it only has to work every-now-and-then, with you it's working much harder to keep the hot ( ) air out, so the aux fans would be turning almost constantly...