Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Search Today's Posts Mark Forums Read

Thread Tools Display Modes
Old 22nd November 2021, 22:50   #11
Premium Trader
trikey's Avatar
75 & ZTT

Join Date: Nov 2010
Location: Norfolk
Posts: 32,286
Thanks: 8,679
Thanked 14,462 Times in 7,897 Posts

Originally Posted by SideValve View Post

Just a thought - if the water-pump were leaking it would emerge from a drain hole. Wonder it that drain hole could be blocked?
Not always, I have seen the bearings fail and leak through the seals! This then drips down the side of the engine block and beacuse the engine is hot, the leaking water tends to dry up before it makes it's way to the floor.
Lest we forget..
trikey is offline   Reply With Quote
Old 23rd November 2021, 08:17   #12
Doesn't do things by halves
SD1too's Avatar
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Middlesex
Posts: 19,084
Thanks: 1,520
Thanked 3,683 Times in 3,123 Posts

Originally Posted by SideValve View Post
... if the water-pump were leaking it would emerge from a drain hole.
As Trikey says, not necessarily! When I was helping another member in the summer we discovered that the steady drip from his water pump was actually coming from a defect in the casting!
The way around the evaporation problem is to inspect very carefully from beneath, immediately after starting the engine from cold. You're looking for the tiniest of drips.

When I had slight but regular loss of coolant it was flattened 'O' rings on the expansion tank cap.

"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 29th November 2021, 21:39   #13
Gets stuck in
SideValve's Avatar
Rover 75 Saloon

Join Date: Apr 2012
Location: Oxford
Posts: 740
Thanks: 135
Thanked 196 Times in 134 Posts

Well the good news is that I fitted another new coolant cap and after a 20 mile spin the level was still spot on.

I'm not 100% optimistic that its fixed, especially seeing how the previous one was less than a year old, but you never know your luck.

Blummin cars...
The Story So Far: Austin A35, Morris Oxford, Triumph Herald, Mini 850, Mini 1000, Austin Allegro, MG Midget, MGB GT, Rover SD1 2600, Austin Maxi, Rover 200, Rover 825, Rover 800, Bedford TK, Range Rover 3.9 efi, Rover 400, Rover 100, MGF, Rover 25, Rover 75 1.8, Rover 75 Connoisseur SE 2.0 V6, MGF 1.8i, Rover 75 Connoisseur 2.0 V6 Auto, Morris Eight Series E, Morris Minor 1275.
SideValve is offline   Reply With Quote
Old 4th December 2021, 08:01   #14
Mike Noc
Relax, it's a Rover.
Mike Noc's Avatar
Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4.

Join Date: Jul 2009
Location: Hampshire
Posts: 11,056
Thanks: 3,295
Thanked 3,010 Times in 2,175 Posts

If you can't find any evidence of coolant leakage why not try a cold pressure test? I knocked up a bit of old hose, a pressure gauge, a scrap tyre valve and a bicycle pump to pressurise the system to around 12 psi and left it overnight.

If the pressure drops with still no sign of leakage whip the plugs out and check the cylinders for dampness.

Last edited by Mike Noc; 6th December 2021 at 14:04..
Mike Noc is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +1. The time now is 18:13.

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright © 2006-2022, The Rover 75 & MG ZT Owners Club Ltd