|
||
|
20th October 2019, 15:51 | #31 |
Avid contributor
MG ZT Join Date: Sep 2014
Location: Westhoughton Bolton
Posts: 233
Thanks: 153
Thanked 16 Times in 14 Posts
|
Mine sounds similar the system isn't pressuring no hiss when i undid the cap with the engine still hot although my heater was still warm
|
20th October 2019, 16:09 | #32 |
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
|
If there is no hiss, when you open, there is no pressure differential between the system and outside.
That is a dead give away for an open system! You have a leak where gas and water can travel. Now where? that is the question.
__________________
Worth his V8 in gold Last edited by kaiser; 20th October 2019 at 16:12.. |
20th October 2019, 16:29 | #33 | |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,381
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
|
Quote:
Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
|
20th October 2019, 16:31 | #34 |
Avid contributor
MG ZT Join Date: Sep 2014
Location: Westhoughton Bolton
Posts: 233
Thanks: 153
Thanked 16 Times in 14 Posts
|
There is a really minor weep on the rubber hose from the expansion tank that joins onto the metal coolant rail, a drip from the bypass i put on to bypass the oil cooler and a really slight seep from what was the bleedscrew. Can even really tiny weeps create airlocks in the cooling system
|
20th October 2019, 16:57 | #35 | |
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
|
Quote:
A leaking bleed screw could well be the result of trying to cure another problem. Unless of course you have one of the rare titanium plastic issue screws! Assume really means: ASS out of U and ME
__________________
Worth his V8 in gold |
|
20th October 2019, 17:09 | #36 | |
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
|
Quote:
What you see as tiny, might not be under load. What you have seen so far might not be all there is! A simple pressure pump fitted on the radiator could show some interesting results!
__________________
Worth his V8 in gold |
|
20th October 2019, 20:01 | #37 |
Avid contributor
MG ZT Join Date: Sep 2014
Location: Westhoughton Bolton
Posts: 233
Thanks: 153
Thanked 16 Times in 14 Posts
|
Yes as fluid leaks out air gets drawn in but I've had cars before that have had a water leak and despite having to top up they never had any temperature problems. Is the cooling system and waterways narrow on these cars which means air could easily get trapped.
|
21st October 2019, 05:21 | #38 |
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
|
This is not so much a case of trapped air, it is a case of too little water in the cooling system.
The Rover k series engines are in need of good cooling. This is one thing one should never take too lightly.
__________________
Worth his V8 in gold |
21st October 2019, 12:56 | #39 | ||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,381
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
|
Quote:
Quote:
Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
||
21st October 2019, 15:22 | #40 |
Avid contributor
MG ZT Join Date: Sep 2014
Location: Westhoughton Bolton
Posts: 233
Thanks: 153
Thanked 16 Times in 14 Posts
|
The oil cooler is blocked with k seal thats why iv bypassed it im getting a used one off somebody breaking a zt180 also getting a used coolant rail with it
|
|
|