|
||
|
28th May 2020, 21:06 | #1 |
Avid contributor
Rover 75 saloon Join Date: May 2019
Location: West Sussex
Posts: 226
Thanks: 54
Thanked 41 Times in 26 Posts
|
KV6 Tick
2nd post in day seems like I'm not having much with my 75
The past few weeks the car had developed a tick on start up I thought it would be the tappets but it started getting worse it lasted longer than few seconds sometimes a couple of minutes so I bought a can of seafoam threw it in and for a day the noise did come back but today it did again this morning so I'm starting to think that perhaps it's not the tappets the noise seems to be coming from drivers side rear but I couldn't pin point it. It does come up with revs but it's more prominent on idle. Also the engine is very smooth and feels completely normal even when the tick is present which baffles me even more. I'm going to include a video it's not the best as it's from the cabin but you can hear the sound https://youtu.be/7W_-TpM6Iqk Thanks in advance Last edited by thanos.m; 28th May 2020 at 21:16.. |
28th May 2020, 21:58 | #2 |
Avid contributor
Rover 75 saloon Join Date: May 2019
Location: West Sussex
Posts: 226
Thanks: 54
Thanked 41 Times in 26 Posts
|
Just to add a few things that I forgot to mention I use Mobil 1 0w-40 and that sometimes turning on the ac seems to quieten it down
|
28th May 2020, 22:17 | #3 |
Avid contributor
MG ZT-T Join Date: May 2014
Location: Romford
Posts: 203
Thanks: 35
Thanked 33 Times in 28 Posts
|
Sounds exactly the same as mine did. I used hydraulic lifter cleaner which seems to have cured it for the last 3 months.
|
28th May 2020, 22:30 | #4 |
Avid contributor
Rover 75 saloon Join Date: May 2019
Location: West Sussex
Posts: 226
Thanks: 54
Thanked 41 Times in 26 Posts
|
Seafoam is exactly that it's quite popular in the us with a lot vids online of it curing valve tick but you're meant to drive about 100-200 miles for it to work and then changing the oil I've only done about 40 miles since putting in so may have not worked yet but I'm thinking if it's any of accessories making the noise or belts or manifold
|
29th May 2020, 08:53 | #5 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
Could it be the 'Slack Tappet Simulator' (STS) as I call it?
Click: https://the75andztclub.co.uk/forum/s...rchid=17845112 Contrary to RAVE, the STS often occurs within seconds of a cold start (especially when the engine's not been run for a while and the fuel vapour cannister is saturated). The tapping follows the engine revs and will persist for quite a while. It's part of the emissions control system and and is quite harmless. TC |
29th May 2020, 09:37 | #6 | |
Avid contributor
Rover 75 saloon Join Date: May 2019
Location: West Sussex
Posts: 226
Thanks: 54
Thanked 41 Times in 26 Posts
|
Quote:
|
|
29th May 2020, 10:11 | #7 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
When/if it happens again, you can confirm if it's STS by unplugging the connector to the cannister purge valve. It's mounted on the right side of the upper inlet manifold (as you look at it).
TC |
29th May 2020, 11:18 | #8 |
Avid contributor
Rover 75 saloon Join Date: May 2019
Location: West Sussex
Posts: 226
Thanks: 54
Thanked 41 Times in 26 Posts
|
Knowing my luck it probably will although the sound seems to be coming from other side and not the purge valve worth a try regardless
|
29th May 2020, 23:00 | #9 |
Avid contributor
Rover 75 saloon Join Date: May 2019
Location: West Sussex
Posts: 226
Thanks: 54
Thanked 41 Times in 26 Posts
|
Unfortunately I unplugged the purge valve but the tick was still there I'm going to do an oil change as its coming up I do them every 6 months or 3k miles see if that will do anything
|
30th May 2020, 10:34 | #10 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,477
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
|
Hello Thanos,
0W40 is not recommended by MG Rover for any 75/ZT engine. For the KV6, 10W40 is listed so I suggest that you first change to that grade which is perfectly satisfactory for our climate. Your hydraulic tappets certainly shouldn't be contaminated with your oil change regime of every 3,000 miles but the presence of the noise for a period from a cold start could point to the extremely low viscosity oil you're currently using. So I'd start with an oil change as you mentioned, but to 10W40 semi-synthetic. You should have plenty of money left over for a bottle (or two) of good wine! Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
|
|