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Author Subject: Engine knocks when warm
Goat

Newbie

Location: Worcester

Registered: 14 Nov 2011

Posts: 14

Status: Offline
Post #1
Just completed a head rebuild on my 6 and I have a knocking sound coming in on operating temperature. It sounds almost like a dry camshaft that sort of dull knocking noise although the motor revs up with no problems at all if held at 2 500RPM you got a slight missfire which is worth mentioning.

I have spent a long time rebuilding the head and checked all the major things like bent vlaves and cracked heads it hasnt been skimmed too low either and it was spotless when it went back on Ive also put a new pump and rad in for peace of mind. The car also tends to search for fuel a bit and when under breaking will just cut out Ive cleaned all sensors and its made it a slight bit better but will probably end up replacing them.

This car has done 141K on some good history with a lady owner for the last 3 years
any help would be greatly appreciated.

P.S reason for the rebuild is from a massive overheating disaster which happened 2 weeks after I bought it and after not finding a leak in the head of any sort I decided to just rebuild it

I have a video of the noise I will try and upload later
Thanks again guys

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moonmilesmaster
Posted 9th May 2012 at 17:09
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dav1

Regular

Location: leek/staffs

Registered: 20 Jun 2011

Posts: 312

Status: Offline
Post #2
did you empty the hydrolic tappets?

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230bhp 205 gti6
Posted 9th May 2012 at 17:13
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Goat

Newbie

Location: Worcester

Registered: 14 Nov 2011

Posts: 14

Status: Offline
Post #3
it was all emptied before it was rebuilt Sad

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moonmilesmaster
Posted 9th May 2012 at 17:18
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coskev

Seasoned Pro

Location: Oswestry

Registered: 01 Nov 2009

Posts: 3,132

Status: Offline
Post #4
As above,they should be emptied when camshafts removed.

Did you read up on timing the cams up before you refitted head?

Easy to bend valves just by turning cam pulleys too farThumbs down

Regards the stalling,have you tried a ECU reset?Thumbs up

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Mac1 ZR R1 kit car build in progress.
Posted 9th May 2012 at 17:20
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Goat

Newbie

Location: Worcester

Registered: 14 Nov 2011

Posts: 14

Status: Offline
Post #5
No idea on how to do an ECU reset other then disconnecting it and starving it of power ? or using a diag tool ? in regards to the timing its all fine had a friend of mine re check my work It's taken me a long time to complete due to being sent wrong parts and all other manner of crap so if its a head back off job im flogging it not gonna have much more love for it

Cheers guys

________________________________________

moonmilesmaster
Posted 9th May 2012 at 17:28
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,871

Status: Offline
Post #6
got a video?

not unknown for bottom ends to knock after a HG failure, especially with relatively high miles.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 9th May 2012 at 17:31
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Goat

Newbie

Location: Worcester

Registered: 14 Nov 2011

Posts: 14

Status: Offline
Post #7
my phone wont upload the video to youtube at the moment I'll keep trying though will keep this updated
cheers

________________________________________

moonmilesmaster
Posted 9th May 2012 at 17:50
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Goat

Newbie

Location: Worcester

Registered: 14 Nov 2011

Posts: 14

Status: Offline
Post #8
a video to the knock excuse my sisters filming I had to feather the throttle to stop it dying

http://www.youtube.com/watch?v=OC1fObrD2eA&feature=youtu.be

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moonmilesmaster
Posted 9th May 2012 at 18:28
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,871

Status: Offline
Post #9
sounds like bottom end bearings.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 9th May 2012 at 18:42
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ryangti6

Seasoned Pro

Location: Pontypool

Registered: 01 Sep 2006

Posts: 1,839

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Post #10
Agree with the above.

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Ryan
Posted 9th May 2012 at 18:55
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Goat

Newbie

Location: Worcester

Registered: 14 Nov 2011

Posts: 14

Status: Offline
Post #11
you know what i would be inclined to agree and give up Sad

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moonmilesmaster
Posted 9th May 2012 at 18:55
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,871

Status: Offline
Post #12
I would be inclined to whip engine oot and take the sump off.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 9th May 2012 at 18:56
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ryangti6

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Location: Pontypool

Registered: 01 Sep 2006

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Post #13
I'd definitly whip the sump off to see what's going on before making any decisions.

I don't know if I'd go to the extent of taking the engine out though Erm?

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Ryan
Posted 9th May 2012 at 19:03
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #14
As said, bottom end is fubared there...Yes

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 9th May 2012 at 19:03
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,871

Status: Offline
Post #15
well I wouldn't go as far as to say fubbared, but certainly a bit tired and will be fubbared if you keep running it.


taking a 6 sump off in situ is a right PITA.

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 9th May 2012 at 19:12
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Goat

Newbie

Location: Worcester

Registered: 14 Nov 2011

Posts: 14

Status: Offline
Post #16
Yeah it's just the lengthy rebuild process ive just completed seriously I dont know if its because of my location but all the parts guys round here BMF/GSF etc are useless giving me wrong radiators and thermo's n gasket sets and then I finally rebuild it and this rears its ugly head I havent got the willpower to keep walking to work in all weathers ill take the sump out anyway check it out and I'll let you guys know what I find otherwise its gonna be new car time Sad shame I only saw 2 weeks use out of this one

Thanks for all the help fellas

________________________________________

moonmilesmaster
Posted 9th May 2012 at 19:14
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #17
Hate to say it but defo sounds like shagged bottom end ? Prob knackered crank as well Sad

Replacement bottom end time Yes
Posted 9th May 2012 at 19:16
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ryangti6

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Location: Pontypool

Registered: 01 Sep 2006

Posts: 1,839

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Post #18
welshpug! wrote:



taking a 6 sump off in situ is a right PITA.


Agreed but no where near enough of one to contemplate removing the whole engine to take it off Imo.

Most people wont have the equipment to remove the engine either where as you can take the sump off with a fairly basic set of tools.


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Ryan
Posted 9th May 2012 at 19:23
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #19
Sump in situ takes me about 2 hours to remove, including jacking the car up, removing undertray etc. Yes

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 9th May 2012 at 19:38
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #20
Goat wrote:
otherwise its gonna be new car time Sad


The question is though, in the condition the vehicle is currently in, what would you be able to sell it for? Not a lot, that I can tell you. Sad

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 9th May 2012 at 19:39
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mechanical_repairs

Seasoned Pro

Location: leicester

Registered: 10 Jan 2005

Posts: 12,122

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Post #21
welshpug! wrote:
well I wouldn't go as far as to say fubbared, but certainly a bit tired and will be fubbared if you keep running it.


taking a 6 sump off in situ is a right PITA.


Easy, air con pump off, one part of the air filter, 16mm bolt and a few 6mm Allen key bolts?


Carl

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Posted 9th May 2012 at 21:28
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bigbadbowen

Seasoned Pro

Location: Winchester

Registered: 21 Nov 2003

Posts: 13,753

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Post #22
Then toss the zircon away along with that shagged bottom end ?

Id just whip the engine out and swap the bottom end over. Its fvcked no point arising about with sumps Yes
Posted 9th May 2012 at 21:39
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Goat

Newbie

Location: Worcester

Registered: 14 Nov 2011

Posts: 14

Status: Offline
Post #23
I have decided that I've had a skinfull of rebuilding stuff as soon as I've bought it so the car is for sale Ill post it up in the for sale section or PM me for some details
The spec is that of a normal 6 without aircon I've just put in
New gasket Head/Inlet/Exhaust/Water pump
New water pump
New Radiator
New block to Rad hose
New Thermostat
Head skimmed
Valves ground/seated
New oil stem seals
all belts have also been changed with new tensioners
cheers guys for all the advice

________________________________________

moonmilesmaster
Posted 10th May 2012 at 09:46
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,871

Status: Offline
Post #24
Hmm "normal" 6's have aircon

________________________________________

need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 10th May 2012 at 11:45
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,769

Status: Offline
Post #25
welshpug! wrote:
Hmm "normal" 6's have aircon


Maybe it's a Phase 1? Dunno

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 10th May 2012 at 15:29
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