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Author Subject: head work
deano9621

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Location: plymouth

Registered: 12 Sep 2010

Posts: 196

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Post #1
hi all,just wanted to know about something thats getting to me,had the tapping on my 6 so i had the head of only to find out there was no bent valves? but have been told that the guides on the exhaust side have all got too much play in them,so i will replace them all,just wanted to know would this be why it is tapping as i have had all the other possible other signs checked, as in lifters and such valves are all fine,and inlet guides are fine tooUnsure

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Posted 29th Sep 2010 at 19:35
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

Status: Offline
Post #2
How have the valves been checked? Often the bend is so slight it is not detectable without a dti, lifters very rarely fail on these engines..... Oh and I find it hard to believe that all the exhaust guides need replacing.... My bets on a valve still it's just finding it.....

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Posted 29th Sep 2010 at 20:00
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deano9621

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Location: plymouth

Registered: 12 Sep 2010

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Post #3
cheers mate,but if the exhaust guides have too much play would this cause it to tap? as the valves are okUnsure

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Posted 29th Sep 2010 at 21:42
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

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Post #4
How many miles has this engine done?

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Posted 29th Sep 2010 at 22:02
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midlife

Seasoned Pro

Location: Colne, Lancashire

Registered: 13 Mar 2006

Posts: 7,544

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Post #5
The only way to check for very slightly bent valves is to give each valve a light lap, if each valve cleans up all the way round your fine, if your unlucky like me you will find two valves that only clean up half way round that needed chucking in the bin.....
Check my project thread out for further details & pics

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Posted 29th Sep 2010 at 22:09
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deano9621

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Location: plymouth

Registered: 12 Sep 2010

Posts: 196

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Post #6
milage is 113 thousand miles unlucklySad but they are worth it,and the valves will be laped

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french forever
T859HFC now goneSad
T534 KVR now new homeSmile
Posted 29th Sep 2010 at 22:53
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midlife

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Location: Colne, Lancashire

Registered: 13 Mar 2006

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Post #7
Deano, your missing my point, you won't know if any of the valves are bent until you try to lap them!!

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Get used to seeing the yellow one !!!MehMehMehMehMeh
Team 330™Cool
Team "no front end or engine"
Team "LIMITED EDITION" I live for the 306 stickerSmug
Team 0-60 in 6.44 & standing qtr in 14.808 @ 94.55mph all with std engineSmug
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Posted 30th Sep 2010 at 01:25
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

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Post #8
or get someone to check them for you.

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Posted 30th Sep 2010 at 01:32
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

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Post #9
As wayne says, lap the valves in lightly, you will soon spot the bent ones!Wink

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Posted 30th Sep 2010 at 01:59
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deano9621

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Location: plymouth

Registered: 12 Sep 2010

Posts: 196

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Post #10
i understand mate,as my local machine shop yeo and smith are doing my head work,find out today if anything else will need doing,keep you all posted ok,cheers deanoRoll eyes

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french forever
T859HFC now goneSad
T534 KVR now new homeSmile
Posted 30th Sep 2010 at 12:33
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deano9621

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Location: plymouth

Registered: 12 Sep 2010

Posts: 196

Status: Offline
Post #11
as i promised,update on my 6 head as i was hoping for in a way, as i wanted to find my problem which was 2 bent inlet valvesSad as i got the phone call late today from my local engineers so all should be well soonBig grin also many thanks for all your advice,as your a good bunch...cheers deano

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french forever
T859HFC now goneSad
T534 KVR now new homeSmile
Posted 1st Oct 2010 at 00:35
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midlife

Seasoned Pro

Location: Colne, Lancashire

Registered: 13 Mar 2006

Posts: 7,544

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Post #12
Glad you found the problemThumbs up

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Get used to seeing the yellow one !!!MehMehMehMehMeh
Team 330™Cool
Team "no front end or engine"
Team "LIMITED EDITION" I live for the 306 stickerSmug
Team 0-60 in 6.44 & standing qtr in 14.808 @ 94.55mph all with std engineSmug
203bhp Corolla T-Sport daily driver stealthier than Kwai Chang Caine
Posted 1st Oct 2010 at 00:49
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jeffers Forum Admin

Location: Leeds

Registered: 14 Dec 2003

Posts: 3,702

Status: Offline
Post #13
Out of interest, was it cylinder 3??

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Posted 1st Oct 2010 at 01:20
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deano9621

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Location: plymouth

Registered: 12 Sep 2010

Posts: 196

Status: Offline
Post #14
don"t know mate will try and find out,but from what was done,i think they checked the the valves after they were all out

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french forever
T859HFC now goneSad
T534 KVR now new homeSmile
Posted 1st Oct 2010 at 01:31
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