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Old 19th April 2011, 20:54   #1
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Default Thar A/C - Dealer Fitment, but issues persist.

Respected Sir,
my friend has a thar crde with an AC installed the problem that he is encountering is that the AC condenser radiator is overheating when vehicle is in ideal (signal stops, heavy traffic ... etc ) when we really need the AC to function properly durning mid-day hyderabadi heat, because of this overheating of condenser the AC relay is tripping on and off very rapidly forcing him to switch the AC off completely, usually the solution to this problem to this will be simple as per the mechanic of the workshop that is to keep a proper sized fan on the condenser so that it wont overheat during vehicle ideal but the problem in doing so is that the condenser is tightly snug between the engine radiator and the turbo intercooler so keeping in a fan of the size required is next to impossible (as the intercooler will have to give way ) because of which they (workshop mechanics) have kept in a small fan that is hardly up for the job and the problem is persisting, today as my friend went to the workshop which is becoming a routine by now and happen to glance upon the scorpio mHawk engine for which the intercooler is neatly placed right above the engine which made him wonder if he could replace the crde head with the mhwak head with the intercooler out of the way by doing so he can have ample space for a proper size fan that the condenser requires and he can even move the condenser up forward a bit to give in to the important clearance between the condenser and the engine radiator for doing so he is ready to cut up the hood for the all important hood scope that the engine mounted intercooler will require
So with the reason why have been explained above is it possible to replace 2.5L CRDE head unit with a mHwak 2.2L head unit and below is picture from which you can see how tightly the condenser fits between the radiator and intercooler
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Thar A/C - Dealer Fitment, but issues persist.-img_1828crop.jpg  


Last edited by karthik123 : 19th April 2011 at 21:04.
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Old 19th April 2011, 21:01   #2
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Karthik, How about some pictures of the engine bay?
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Old 19th April 2011, 21:03   #3
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Instead of changes in engine, why not consult an AC specialist and ask him to modify AC system and shift the place of condenser? IMO this will only need custom pipes which carry refrigerant and will be cheaper and efficient option than fiddling with complicated diesel engine.
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Old 19th April 2011, 21:05   #4
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Added the picture, sorry didn't remember the limit of the max.size.
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Old 19th April 2011, 21:07   #5
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Condenser over heating? Are you sure it is due to the small fan only or if there is some problem in retrofitting itself.
You may face severe warranty issues if you carry out that modification. So Consult Mahindra about this.
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Old 19th April 2011, 21:13   #6
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Dear karthik,

don't think of going into any extreme mods at this moment, as honestly it doesn't make any sense in thinking of changing the head,
it will just affect the warranty and the overall reliability.

why don't you check out the install procedure which was done on your friend's thar with the procedure posted on the other thar thread by DB sir?
afaik there must be something wrong with the installation and must be a minor issue.

if needed get it checked out once at a independent professional ac workshop for a second opinion. there are many good ones in hyd.

anyways spike or DB sir would be the best people to comment on this.

hope this helps,

aadix.

Last edited by aadix : 19th April 2011 at 21:18.
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Old 19th April 2011, 21:48   #7
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Quote:
Originally Posted by Hashim View Post
Instead of changes in engine, why not consult an AC specialist and ask him to modify AC system and shift the place of condenser? IMO this will only need custom pipes which carry refrigerant and will be cheaper and efficient option than fiddling with complicated diesel engine.
it was considered to change the location of the condenser but it is not possible to move it anywhere else because of lack of space

@aadix:- sir please can you share the contact details of a professional ac workshop that you know of thank you

Last edited by karthik123 : 19th April 2011 at 21:53.
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Old 19th April 2011, 22:12   #8
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Default re: Thar A/C - Dealer Fitment, but issues persist.

@Karthik123: Firstly what compressor, evaporator and cooling coil are being used in your friend's vehicle. Also how much gas has been filled in the circuit.

My suggestion would be not to go anywhere outside but get it fixed with the ASC only. Make sure the ASC has used Bolero VLX (Not SLX) compressor (both compressors have different setting) and there is 610 gms +/- 20 gms of R134a in the circuit.

Also as per the AC instal guide given by Behram Dhabhar, you need to get 2 fans on the condensor coil. Am sure it will solve all the over heating problems.

Cheers
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Old 19th April 2011, 22:24   #9
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Kartik have you seen Mr.Behram's post in the Thar review thread.It shows a picture with 2 fans and not one.So get that installed and it should work.Infact check your installation as per the manual given by Mr.BD and lets see how it then performs in the hyderabadi heat.


http://www.team-bhp.com/forum/offici...ml#post2318144 (Mahindra Thar : Test Drive & Review)
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Old 19th April 2011, 23:46   #10
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Default re: Thar A/C - Dealer Fitment, but issues persist.

So what i heard was true So was this installed by dealership? If so try to point them towards BD's post and get it sorted at their expense. Also how much did this install cost?
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Old 20th April 2011, 00:03   #11
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Default re: Thar A/C - Dealer Fitment, but issues persist.

@ milecruncher and navpreet318 :- sir the condenser shown in the picture given by Mr.Behram sir (in http://www.team-bhp.com/forum/offici...ml#post2318144 (Mahindra Thar : Test Drive & Review)) has a large compressor (at least looks larger then my friend's) is it taken from bolero VLX as well ? or does it need to be specially ordered from mahindra

Last edited by karthik123 : 20th April 2011 at 00:32.
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Old 20th April 2011, 00:04   #12
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Just to give you an idea, I had similar problem with the AC on our Ambassador. We did not have space for a fan between the condenser and grille and it was running just with the engine fan and was getting over heated. What the AC technicians did was they moved the condenser to underbody(just below the driver seat) and have fitted the fan. This solved the purpose. If you are planning for heavy off roading, this position may not be suitable for the Thar.
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Old 20th April 2011, 08:54   #13
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Default re: Thar A/C - Dealer Fitment, but issues persist.

Quote:
Originally Posted by karthik123 View Post
So with the reason why have been explained above is it possible to replace 2.5L CRDE head unit with a mHwak 2.2L head unit and below is picture from which you can see how tightly the condenser fits between the radiator and intercooler
Karthik, don't even think of doing such things, there are simpler solutions to this. Please post detailed pics of the engine bay with all mountings and routings.

Quote:
Originally Posted by MileCruncher View Post
@Karthik123: Firstly what compressor, evaporator and cooling coil are being used in your friend's vehicle. Also how much gas has been filled in the circuit.
Charge is not the problem here.

Quote:
Originally Posted by karthik123 View Post
@ milecruncher and navpreet318 :- sir the condenser shown in the picture given by Mr.Behram sir (in http://www.team-bhp.com/forum/offici...ml#post2318144 (Mahindra Thar : Test Drive & Review)) has a large compressor (at least looks larger then my friend's) is it taken from bolero VLX as well ? or does it need to be specially ordered from mahindra
Compressor in SLX, IIRC is 130 cc whereas VLX is 150 cc. Any idea about the Heat dissipation capacity of the installed condenser? The Compressor recommended is of Bolero VLX.

Spike
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Old 20th April 2011, 09:40   #14
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Default re: Thar A/C - Dealer Fitment, but issues persist.

@Karthik:

The intercooler needs to be better positioned - Take a look at the Bolero VLX and copy the AC installation there!

BTW, You cannot replace the 2.2Mhawk on the Meagle!
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Old 20th April 2011, 10:25   #15
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Default re: Thar A/C - Dealer Fitment, but issues persist.

^^ Apart from the AC Compressor from the Bolero VLX and a few AC pipes nothing else can be copied from AC installation of Bolero VLX onto Thar.

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