Noisy M12 on start up

[rjb1975]

My M12 GTO 2.5 makes a rattling noise on start up when cold. This sound decreases a little as the engine warm up. Sounds like a tappets noise. Any ideas or anyone else come across this. The car is 2003 and only done 22,000 miles. It’s not horrific but now I have noticed it and its got worse it’s really irritating me now

[peterguk V6 KWK]

Timing chain tensioners? They're a known issue on 2.5s...

Edited by peterguk V6 KWK on Friday 3rd October 08:41

[rjb1975]

Thanks, do you know if that is an engine out job ?

Edited by rjb1975 on Friday 3rd October 09:05

[peterguk V6 KWK]

The factory did mine about 2 years ago. Not an engine out job. About 8 hours though

Early tensioners had an issue where the "ratchet" or whatever does not stay taught, causing the chains to go slack overnight. They rattle until the oil pressure pumps them back up again.

Mine used to rattle when cold, but were quiet on a hot start.

[NobleGuy]

rjb1975 said:

My M12 GTO 2.5 makes a rattling noise on start up when cold. This sound decreases a little as the engine warm up. Sounds like a tappets noise. Any ideas or anyone else come across this. The car is 2003 and only done 22,000 miles. It’s not horrific but now I have noticed it and its got worse it’s really irritating me now

Hmmm. Tappet rattle. Is it at the top of the engine? If so, this might be what you're after:

http://www.pistonheads.co.uk/gassing/topic.asp?h=0...

[S1mon L]

Mine makes this noise as well on start up, noise then gets less and less as it warms up then once at operating temp is gone. Does your noise go up and down with the revs? Been back to the garage a couple of times for this and a few other issues but has just been put down to noise from cold as it takes ages for the oil to get round. design fault???

[NobleGuy]

S1mon L said:

design fault???

If it is the same problem in that thread then yes, it's a common known Ford engine issue that they have released a bulletin for. Also regarded as a 'nice-to-have' fix rather than an essential one.

[S1mon L]

As i thought, thanks, one for the warranty me's thinks

[rjb1975]

Thanks for all the help. Off to garage tommorrow so see what they suggest and if its covered on warranty !Will let you know how i get on

[S1mon L]

rjb1975 said:

Thanks for all the help. Off to garage tommorrow so see what they suggest and if its covered on warranty !Will let you know how i get on

Would be interested to hear what they say.....Thanks!!

[rjb1975]

Well having visited the garage I have been informed the noise is wear and tear not an item claimable on the warranty.

I have been told it’s an engine out job to replace the belts and that’s about 30hrs???!!!

I think I will live with the noise when it starts up it is annoying but not annoying enough to substantiate a 30hrs labour bill!!

[NobleGuy]

rjb1975 said:

I have been told it’s an engine out job to replace the belts and that’s about 30hrs???!!!

What belts? Like the alternator, etc?

[peterguk V6 KWK]

rjb1975 said:

Well having visited the garage I have been informed the noise is wear and tear not an item claimable on the warranty.

I have been told it’s an engine out job to replace the belts and that’s about 30hrs???!!!

I think I will live with the noise when it starts up it is annoying but not annoying enough to substantiate a 30hrs labour bill!!

Belts?? Ummm, only two belts i know of, and they are on the outside..

The timing chains can be changed engine in-situ. The factory charged me about £900 all in....

[NobleGuy]

Was also wondering if they meant the timing belt. If so, let them know it doesn't have one...

Like mentioned above, only two belts I can think of too, and they're definitely accessible.

[rjb1975]

Sorry for my mispost i was told the the timing chains (not belts) would need replacing and its an engine out job. There arent any chains NobleGuy?

Edited by rjb1975 on Friday 17th October 08:07

[peterguk V6 KWK]

rjb1975 said:

Sorry for my mispost i was told the the timing chains (not belts) would need replacing and its an engine out job. There arent any chains NobleGuy?

See my post above.

[rjb1975]

Thanks Peter.

[NobleGuy]

Timing chain is much more like it.