KV6 Oil pickup O-Ring ?
 

My ZT190 always sounds noisy when first started from cold. Its an 02 plate and I've seen from reading threads on here that I might need a new oil pick up O-ring in the sump.

ITEM: O Ring - LYX000210L https://rimmerbros.com/Item--i-LYX000210L

I don't know for certain if this will cure the problem but I'm willing to give it a shot.

Is it easy enough to remove the sump and replace the O-ring?

Also, it looks as though there isn't a sump gasket on the KV6, rather some sealant instead? .

Looking at rimmers prices, that seems excessively expensive :eek: https://rimmerbros.com/Item--i-LVV005188

Is there an inexpensive alternative?

What sort of noise Gareth?

Simon

A tapping/knocking sound that disappears after a couple of minutes.

Sounds like its coming from the top of the engine I think. :shrug:

From my own experience I'd say that's one of the following:

• Cut(s) in the rubber of the ancillary drive belt.
• Worn ancillary belt tensioner and/or idler pulley.
• Worn timing belt tensioner pulley and/or idler pulley.

What is the reasoning which you've read which suggests that this could be caused by an 'O' ring on the oil strainer pick-up pipe? :shrug:

Simon

My 04 is also noisy on start-up, almost sounds like a diesel, but disappears as it warms up. All new belts & whistles last year so not related. Going to do an oil change soon and hope it improves.

According to T-cut my 04 falls outside the range of the O ring Technical Bulletin
https://the75andztclub.co.uk/forum/s...ad.php?t=64237

Regards

That depends Mike on whether "whistles" includes tensioners and idler pulleys. ;) Were they definitely renewed?
Unfortunately that thread is inconclusive.

Simon

Yes, all new, I've got the invoice somewhere from the former owner, and even spoken to the mechanic who did the job at a cost of approx. £1600 !

Inconclusive perhaps but it answers the OP's question about the O ring.

Regards

Here is my experience on that o-ring. My Son had been experiencing some top end noise from his zs180 and off course he had been reading about the alleged o-ring issue, I thought it highly unlikely that this was the case, but he eventually persuaded me to remove the sump which is no mean feat if you are trying to avoid disturbing the exhaust manifold. Spent quite a few hours at it for nothing as the o-ring was indeed intact and had plenty squeeze and suppleness on it to be refitted, however what we did find in the sump was tiny fine metallic fragments which were non magnetic I thought perhaps were main bearing material.

Have fun removing the sump, especially the set screw nearest the front which needs to be cut in place with a modified hacksaw blade and the sump hanging half down. Fit a shorter set screw in its place as there is plenty depth of thread in the sump.

Later we fitted new tappets but this didn’t cure the rattle. (Btw it wasnt the manifold which was already eliminated). Eventually I pulled the engine and stripped (notice the I as son has a habit of sneaking off and doing something else and leaving to dad) it down to find the timing end main bearing had almost lost all of its white metal backing. This was quite scary to see as he has a heavy right foot and would have been only a matter of time before a conrod exited the crankcase or such.

So on one hand I think you are wasting time removing the sump as the o-ring will be intact, however on the other at least we discovered the contents of the sump which told us that the bearing were beginning to break up.

I have a similar issue which has so far evaded diagnosis. Taps when the engine is stone cold, but disappears after 2 minutes max (sometimes less). Engine then sounds sweet as a nut.

A number of folk who know these engines inside out say it's not tappets and sounds more like mains (:eek:), however they are puzzled by the way the sound disappears so completely.

I had a full belt change (including idlers & tensioners) to rule that out and also had the sump dropped and a new oil pickup pipe (with "o"ring) fitted, all with no improvement. Oil pressure (both cold and hot) is spot on. I also sent oil samples off for analysis and they came back with a clean bill of health, showing no signs of engine wear at all. All very odd.

Needless to say, I'll be interested to hear if you find a resolution to your noise.

Cliff

Edit:

I meant to add, the oil pickup pipe was considered due to a bulletin issued by MG Rover which read as follows:

"TB0037 Issue 2
19.10.2001
ENGINE
Title:
TAPPET NOISE – AIR LEAK AT OIL PICK-UP ‘O’ RING
Affected range:
All vehicle with KV6 engines up to the following engine numbers:
20K摯瑬敳獩 ∗∗∗∗168295 - 2.0 engine
25K摯瑬敳獩 ∗∗∗∗168506 - 2.5 engine
Description:
Tappet noise on cold start or when engine idling.
This condition is due to air entering the tappet oil chambers. The source of air entry is likely to be at the ‘O’
ring seal situated between the oil pick-up strainer to bearing carrier connection.
This condition has been rectified from the engine change point quoted."

(Thanks to RogerHeinz57 for the bulletin info)

Include me in that statement, probably others too.

Regards