Cold air from vents (one side)

Fyfeal · 10th July 2014, 12:06

Hi everyone

This is my first post. I got myself a 2004 75 estate 1.8 a couple of months ago for a song. It's a labour of love - so far i have put in a new radiator, new timing belt, shock absorber, and new discs and pads all round. It is also about to get the alloys redone and into the paintshop for scuff removal. I am determined to keep this 75 on the road.

I am well aware of gasket issues but mine seems ok (touch wood). However, i have noticed that the air coming into the cabin in the pasenger side is cool but driver side is ok (both are at same temp setting). My coolant level is fine.

Any ideas?

Cheers!!!

okenora · 10th July 2014, 15:55

the heater matrix is most likely silted up on the passenger side, common problem

how to fix is here

SD1too · 10th July 2014, 15:58

Hello Allan and

What you describe is well known on the forum. It's most likely to be a partially blocked heater matrix. This happens when previous owners add cooling system leak sealing gunges and they block the fine passages in the matrix, thinking they are a leak. The worst by far is K-seal which is almost impossible to remove. I understand it leaves a residue of bright tiny flakes in the expansion tank.

The other possibility is an air lock. This can be removed by bleeding the system properly as described here by MG Rover. Did you do this when you changed the radiator?

Simon

10th July 2014, 12:06	#1
Fyfeal Newbie Rover 75 Tourer Join Date: Jun 2014 Location: Glasgow Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	Cold air from vents (one side) Hi everyone This is my first post. I got myself a 2004 75 estate 1.8 a couple of months ago for a song. It's a labour of love - so far i have put in a new radiator, new timing belt, shock absorber, and new discs and pads all round. It is also about to get the alloys redone and into the paintshop for scuff removal. I am determined to keep this 75 on the road. I am well aware of gasket issues but mine seems ok (touch wood). However, i have noticed that the air coming into the cabin in the pasenger side is cool but driver side is ok (both are at same temp setting). My coolant level is fine. Any ideas? Cheers!!!

10th July 2014, 15:58	#3
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,378 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hello Allan and What you describe is well known on the forum. It's most likely to be a partially blocked heater matrix. This happens when previous owners add cooling system leak sealing gunges and they block the fine passages in the matrix, thinking they are a leak. The worst by far is K-seal which is almost impossible to remove. I understand it leaves a residue of bright tiny flakes in the expansion tank. The other possibility is an air lock. This can be removed by bleeding the system properly as described here by MG Rover. Did you do this when you changed the radiator? Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

10th July 2014, 15:55	#2
okenora Posted a thing or two Rover 75 Conn CDT SE + intelligence pack Join Date: Jun 2013 Location: Enniskillen Posts: 1,094 Thanks: 6 Thanked 141 Times in 128 Posts	the heater matrix is most likely silted up on the passenger side, common problem how to fix is here