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 Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 7th July 2020, 12:15   #1
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default Tick is back plus sludge

Hi Everyone,
About a month ago my kv6 was ticking on start up after an oil change it went away yesterday the tick came back went to check the oil and the top of the engine where you can see from the oil cap was full of sludge I know KV6s tend to sludge up on short journeys but it's done less than 1k miles since the last oil change not only on short journeys and the amount of sludge was exesive which makes me wonder what's going on coolant is crystal clear though and there is no sign of bubbling or anything coming from it perhaps I've got a failing oil cooler but then again ive been told that if it was that I would see the oil level increase dramatically which it hasn't. Any ideas ?
Thanks in advance,
Thanos
thanos.m is offline   Reply With Quote
Old 7th July 2020, 16:34   #2
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default

Here are a few pics
Attached Images
File Type: jpg rsz_20200707_172351.jpg (135.0 KB, 65 views)
File Type: jpg rsz_20200707_172412.jpg (61.0 KB, 70 views)
File Type: jpg rsz_1rsz_20200707_172522.jpg (25.3 KB, 64 views)
thanos.m is offline   Reply With Quote
Old 9th July 2020, 09:03   #3
Lord of Hog
Gets stuck in
 
Lord of Hog's Avatar
 
Rover 75 2.5 V6 in Wedgwood Blue

Join Date: Dec 2015
Location: Felbridge, East Grinstead
Posts: 982
Thanks: 250
Thanked 294 Times in 206 Posts
Default

Can you be more specific about the sort of ticking and where it's coming from?
Rapid ticking from somewhere around the middle could be tappets. Slower ticking from the N/S could be fuel purge valve. More of a rattling sound could be your upper inlet manifold chamber on the way out.
__________________


Conformity is not morality.
Consensus is not truth.
Lord of Hog is offline   Reply With Quote
Old 9th July 2020, 21:29   #4
COLVERT
This is my second home
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
Default

Engine breather blocked ??---

It's got to be getting moisture from somewhere to form the sludge.
COLVERT is offline   Reply With Quote
Old 10th July 2020, 19:44   #5
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default

Quote:
Originally Posted by Lord of Hog View Post
Can you be more specific about the sort of ticking and where it's coming from?
Rapid ticking from somewhere around the middle could be tappets. Slower ticking from the N/S could be fuel purge valve. More of a rattling sound could be your upper inlet manifold chamber on the way out.
It was tappet tick changed the car back to 10w-40 from Mobil 1 0w-40 and it disappeared
thanos.m is offline   Reply With Quote
Old 10th July 2020, 19:46   #6
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default

Quote:
Originally Posted by COLVERT View Post
Engine breather blocked ??---

It's got to be getting moisture from somewhere to form the sludge.
I've changed the breather pipes so it can't be blocked unless there is something I'm missing problem is I've got a leaky thermostat so I can't really tell if its using coolant or not but I've just had a new one delivered which should give some answers

Last edited by thanos.m; 10th July 2020 at 19:53..
thanos.m is offline   Reply With Quote
Old 10th July 2020, 21:20   #7
COLVERT
This is my second home
 
R75 Saloon.

Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
Default

Quote:
Originally Posted by thanos.m View Post
It was tappet tick changed the car back to 10w-40 from Mobil 1 0w-40 and it disappeared
I guess that's an indication of wear in the hydraulic tappet bodies. The thin oil escaping faster than the thicker grade.

The pressure from the oil pump might also have improved a little with the thicker oil.-
COLVERT is offline   Reply With Quote
Old 11th July 2020, 08:16   #8
SD1too
Doesn't do things by halves
 
SD1too's Avatar
 
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model.

Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,265
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
Default

Quote:
Originally Posted by thanos.m View Post
... perhaps I've got a failing oil cooler ...
I think you're probably right Thanos. I can't enlarge the 'thumbnail' style pictures but it looks really horrible in there.

The usual diagnostic technique is to by-pass the cooler temporarily and flush the cooling system repeatedly. MGJohn reports good results on his 1.8 engines with Holts Speedflush remaining in the system for a short time. Hopefully this check will confirm our suspicions and you can then order a replacement cooler.

Simon
__________________
"Whatever is rightly done, however humble, is noble."
Sir Henry Royce.
SD1too is offline   Reply With Quote
Old 11th July 2020, 11:23   #9
thanos.m
Avid contributor
 
Rover 75 saloon

Join Date: May 2019
Location: West Sussex
Posts: 220
Thanks: 54
Thanked 41 Times in 26 Posts
Default

Quote:
Originally Posted by SD1too View Post
I think you're probably right Thanos. I can't enlarge the 'thumbnail' style pictures but it looks really horrible in there.

The usual diagnostic technique is to by-pass the cooler temporarily and flush the cooling system repeatedly. MGJohn reports good results on his 1.8 engines with Holts Speedflush remaining in the system for a short time. Hopefully this check will confirm our suspicions and you can then order a replacement cooler.

Simon
Thanks for that the coolant is crystal clean though just getting loads of sludge at the oil cap and around it in the engine but when I changed the oil now a month after doing an oil change and about 800 miles i got almost bang on 5.2 liters out of it. I'm getting the thermostat done in the coming days so I'll monitor coolant level after that and I guess take it from there.
thanos.m is offline   Reply With Quote
Old 13th July 2020, 11:41   #10
chris75
same car since 2005
 
chris75's Avatar
 
2001 Rover 75 2.0 v6 Connoisseur Saloon

Join Date: Nov 2006
Location: Ellesmere Port , Cheshire
Posts: 3,810
Thanks: 379
Thanked 549 Times in 466 Posts
Default

How many miles has the engine done ? You mention changing the breather pipes but have you changed or cleaned the mesh filters in the cam covers ?
( no. 14 on here https://rimmerbros.com/Item--i-GRID001711 ) They can be blocked solid at high mileage .
__________________
Who said it was simples ?
chris75 is offline   Reply With Quote
Reply

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. The time now is 20:18.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd