Weird temperture behaviour 2.5 v6 - Page 3

Pruts3r · 29th December 2016, 14:13

Well its been a few days and a few trips and while the temperature stays perfect she does keep losing coolant. Been parked next to my house now since sunsday and every day i peek under the coolant cap and you see the coolant level being lower every day. Yesterday it reached just below the LOW marking and so i topped her up again (100ml) and she was at MAX.
Today checked again and yep, dropped a few mm again... Any ideas? No puddles under her... O rings in V and themostat are good. Radiator is new... Mechanic says maybe heater matrix is leaking? This also since only the left side of the interior gets hot air when the heater is on....

SD1too · 29th December 2016, 14:33

Quote:

Originally Posted by Pruts3r

Mechanic says maybe heater matrix is leaking? This also since only the left side of the interior gets hot air when the heater is on....

It's more likely that you have air in the cooling system. It must be drained and refilled strictly according to the MGR procedure to avoid this. That's what you need to do next.

Simon

Pruts3r · 29th December 2016, 14:50

Quote:

Originally Posted by SD1too

It's more likely that you have air in the cooling system. It must be drained and refilled strictly according to the MGR procedure to avoid this. That's what you need to do next.

Simon

We allready did that... Following the procedure on the link.

SD1too · 29th December 2016, 18:08

Quote:

Originally Posted by Pruts3r

We allready did that... Following the procedure on the link.

Well if you're absolutely certain that the expansion tank was raised and that the engine wasn't started until the bleed screw had been refitted (a common misunderstanding) then you may have an as yet undetected leak. Check the oil filter casing for watermarks.

But I am interested in your heater matrix fault. It's usually the LH side (when seated inside the car) which is cold because the coolant has to travel further to that side of the matrix. You seem to have the opposite problem which is unusual. If the matrix was leaking, as your mechanic suggests, you would have a chronic misting and condensation problem.

Simon

Pruts3r · 29th December 2016, 20:59

Well i dont know if that has anything to do with the fact that it is a LHD car?

SD1too · 30th December 2016, 11:37

Quote:

Originally Posted by Pruts3r

Well i dont know if that has anything to do with the fact that it is a LHD car?

Look in both front footwells. On which side of the car are the heater matrix pipes: driver's or passenger's side?

Simon

Pruts3r · 28th January 2017, 06:46

Quote:

Originally Posted by SD1too

Look in both front footwells. On which side of the car are the heater matrix pipes: driver's or passenger's side?

Simon

Sorry for the very late reaction. Heater pipes are on the drivers side. Sow matrix is faulty. Thank god Rimmerbros had a 50% discount

so now it is laying here awaiting montage in the car.

As for de coolant mystery...we examend the engine thoroughly last friday (oilfilter casing, underneath the car, complete enginebay and everything) with the hope to spot a leak somewhere but notthing. I dont understand it. She runs perfect. No smoke. No trouble starting. Coolant is clear as can be. Oil on dipstick is fine. Temp is perfect but sometimes when driving or when standing parked for few days the coolant level drops a bit

but then sometimes it stays on level perfect . Only thing i can think of is it dropping in the engine somewhere (oil cooler would be best case scenario i prosume?)

Fyi: it is filled with red g12+ coolant and my car has the black coolantresevoir and the '100' cap.

Pruts3r · 31st January 2017, 18:48

ANYBODY got ANY ideas about the coolant loss (besides HGF and dropped cylinderliners)??
Please help cause i am going insane here
Just checked her and had to top up coolant again 100-200 ml after half an hour trip...

kaiser · 31st January 2017, 19:49

thermostat
inlet manifold gaskets
metal pipes in front of radiator
radiator cap
water pump
oil cooler
radiator
any plastic fitting in cooling system

more or less in order of importance

Pruts3r · 1st February 2017, 21:12

Quote:

Originally Posted by kaiser

thermostat
inlet manifold gaskets
metal pipes in front of radiator
radiator cap
water pump
oil cooler
radiator
any plastic fitting in cooling system

more or less in order of importance

thermostat is replaced
InletM gasket will be the first to swap.
Waterpump is new (swapped with cambelts)
Radiater is new aswel.

Wil check pipes and plasticfittings

29th December 2016, 14:13	#21
Pruts3r Avid contributor 1999 Rover 75 Sterling - Pewter Grey - Aubergine Leather & 1985 Rover 3500 Vitesse - Targa Red Join Date: Aug 2016 Location: Rotterdam Posts: 122 Thanks: 40 Thanked 19 Times in 13 Posts	Well its been a few days and a few trips and while the temperature stays perfect she does keep losing coolant. Been parked next to my house now since sunsday and every day i peek under the coolant cap and you see the coolant level being lower every day. Yesterday it reached just below the LOW marking and so i topped her up again (100ml) and she was at MAX. Today checked again and yep, dropped a few mm again... Any ideas? No puddles under her... O rings in V and themostat are good. Radiator is new... Mechanic says maybe heater matrix is leaking? This also since only the left side of the interior gets hot air when the heater is on.... __________________ '99 Rover 75 sterling 2.5 auto in Pewter grey with Aubergine interior •Born on Wednesday the 23rd of June 1999 @ 11:35:32 •The 6367th 75 to be produced. •The 214th Pewter Grey 75 out of 442. •Probably one of a handful Pewters with Aubergine.

29th December 2016, 20:59	#25
Pruts3r Avid contributor 1999 Rover 75 Sterling - Pewter Grey - Aubergine Leather & 1985 Rover 3500 Vitesse - Targa Red Join Date: Aug 2016 Location: Rotterdam Posts: 122 Thanks: 40 Thanked 19 Times in 13 Posts	Well i dont know if that has anything to do with the fact that it is a LHD car? __________________ '99 Rover 75 sterling 2.5 auto in Pewter grey with Aubergine interior •Born on Wednesday the 23rd of June 1999 @ 11:35:32 •The 6367th 75 to be produced. •The 214th Pewter Grey 75 out of 442. •Probably one of a handful Pewters with Aubergine.

31st January 2017, 18:48	#28
Pruts3r Avid contributor 1999 Rover 75 Sterling - Pewter Grey - Aubergine Leather & 1985 Rover 3500 Vitesse - Targa Red Join Date: Aug 2016 Location: Rotterdam Posts: 122 Thanks: 40 Thanked 19 Times in 13 Posts	ANYBODY got ANY ideas about the coolant loss (besides HGF and dropped cylinderliners)?? Please help cause i am going insane here Just checked her and had to top up coolant again 100-200 ml after half an hour trip... __________________ '99 Rover 75 sterling 2.5 auto in Pewter grey with Aubergine interior •Born on Wednesday the 23rd of June 1999 @ 11:35:32 •The 6367th 75 to be produced. •The 214th Pewter Grey 75 out of 442. •Probably one of a handful Pewters with Aubergine.

31st January 2017, 19:49	#29
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	thermostat inlet manifold gaskets metal pipes in front of radiator radiator cap water pump oil cooler radiator any plastic fitting in cooling system more or less in order of importance __________________ Worth his V8 in gold