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Old 21st April 2022, 17:14   #11
YMGF
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Thanks TC, that's a great tip which I'll be trying.

Michael.
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Old 22nd April 2022, 16:22   #12
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Quote:
Originally Posted by SD1too View Post
Hi Michael,

In my experience this could be one of four things.
  1. Contaminated hydraulic tappets, particularly as the car has not been fully used for 6 years. One or two doses of Comma "Flush Out" is effective for this. This product is not added to your oil, it temporarily replaces it but with the car stationary at a fast idle only. After use, change the filter and refill with 10W40.
  2. Cuts in the ancillary belt rubber. An inspection via the OSF wheelarch will reveal this.
  3. Worn timing belt tensioner and/or idler pulleys. What was the mileage when you renewed the belts? It's hard to say when mine started being noisy but it was well after 50,000 miles.
  4. A rattling power valve linkage in the manifold chamber.

If you've removed the engine sound-deadening cover to determine that the noise is without question the tappets, then proceed with using Flush Out.

Simon
Hi Simon. The flushing oil process. I have never been one for using anything in an engine apart from engine oil. When you use the flushing process, have you given any thought about how much is still retained in the upper part of the engine when it is drained out?
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Old 22nd April 2022, 19:07   #13
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Quote:
Originally Posted by dave lincs View Post
Hi Michael
There was a bulletin about the o ring on the pick up pipe but from memory it was only a certain range of 2.0v6 engines I will try and find it and check, I would suspect from your description that it has got some piston slap this often happens on cars that get used on short trips with a lot of cold starts if that's what it is dont worry about it as when warm the noise will have gone

Dave
Got the Technical Bulletin on my hard drive:

Affected range: All vehicle with KV6 engines up to the following engine numbers:

20K∗∗∗∗∗ 168295 - 2.0 engine
25K∗∗∗∗∗ 168506 - 2.5 engine

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Old 23rd April 2022, 07:21   #14
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Quote:
Originally Posted by bl52krz View Post
Hi Simon ... When you use the flushing process, have you given any thought about how much is still retained in the upper part of the engine when it is drained out?
Hello David,

This subject always attracts suspicion. Whenever any oil change is carried out there will be a film left behind and some pools in the cam carrier casting but the quantity is minimal as a proportion of the 5 litres capacity of the KV6. This principle, of course, also applies to the contaminated oil if no flushing process is performed. If that's considered acceptable then why also isn't a product sold by a specialist lubricant manufacturer for decontamination purposes?

I've used Comma Flush Out when necessary on several of my cars with no ill effects. Perhaps the best example of this is the 150,000 miles I put on my SD1 engine with no repairs being necessary. It retained the original camshaft, hydraulic tappets and passed the MOT with emissions impressively below the required level.

For these reasons I have no hesitation in recommending Comma Flush Out to members.

All the best,

Simon

PS I haven't had to use flushing oil for some time now as oil changes more frequent than the manufacturer's recommendation has rendered it unnecessary.
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Old 23rd April 2022, 16:05   #15
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Here's a copy of a copy of the MGR Technical Bulletin.
It's a bit blurred, but readable using the enlarge button.

TC
Attached Files
File Type: pdf TB0037 Issue 2.pdf (129.8 KB, 26 views)
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Old 27th April 2022, 13:46   #16
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Quote:
Originally Posted by Teflon View Post
Here's what mine sounded like (noise starts around 19 seconds in):



Once the engine was warm, the noise vanished.

Cliff
Can you repost the audio clip?
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Old 29th April 2022, 06:23   #17
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I had this on my ZT 190. Then I put some engine flush in the oil, let the car idle for 20 mins and drained the oil and left it to drain for a further 20 mins. Used Petronas oil and fault was cured. It only happened on start up for about 10 seconds when it occurred. Car was quieter after and never occurred again.
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