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09-09-2006, 11:20 PM
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#1 | ||
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78Fury
Join Date: Sep 2006
Location: Hastings New Zealand
Posts: 4
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Hi Guys I have 3 AU's 1 1999 Fairlane V8, 1 !999 LTD 6, and 1 2000 LTD V8
The 2000 LTD has a light knock mainly noticable at idle and usually after a service. It sounds like a big end knock but is intermitent. It started at around 70,000k's now done 130,000k's but still about the same loudness. I took it to ford they heard it put it up on the hoist got under to listen and it stopped and thats how it is, sometimes it knocks sometimes it doesn't. The 99 V8 has done 105,000k's and if I listen real hard I can imagine that I hear the same knock occasionally. Has anyone else had this problem? This knock does go away after a few thousand k's after servicing. I suggested a different grade of oil but the powers that be tell me they are using the right stuff. |
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09-09-2006, 11:43 PM
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Banned
Join Date: Jan 2005
Location: Beaumont Hills
Posts: 2,536
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I was going to say use a different oil.. what oil are they using at the moment?
I find Penrite HPR15 is very very good.. highly recommend the stuff, ford and most service places recommend 5w30 for these engines, I personally think this grade oil is just too thin.. hence the reason for me using PenriteHPR15. |
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09-09-2006, 11:49 PM
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#3 | |||
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Back to Le Frenchy
Join Date: Feb 2005
Location: Back home.....
Posts: 13,346
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Even Penrite HPR 30 which is a 20w 60, that was reccomended to me by someone that used to work at the ford plant.
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Quote:
07 Renault Sport Megane F1 Team R26 #1397
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09-09-2006, 11:53 PM
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#4 | ||
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Banned
Join Date: Jan 2005
Location: Beaumont Hills
Posts: 2,536
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HPR30 is toooo thick.. well depending on engine k's..
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10-09-2006, 12:05 AM
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#5 | ||
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78Fury
Join Date: Sep 2006
Location: Hastings New Zealand
Posts: 4
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Yeah thanks for that, forgot what grade they told me they used tried to find it on the bills to no avail. but I'll dump this lot and try your suggestion. Couple of times I tipped some STP down it's neck to shut it up.
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10-09-2006, 12:09 AM
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#6 | ||
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Banned
Join Date: Jan 2005
Location: Beaumont Hills
Posts: 2,536
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Let us know how it goes.. Id be interested to see if the thicker oil makes a difference.
It did with my car.. always had tappy start up, and it just didnt 'feel' right.. tried HPR15 and havent looked at anything else since. |
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10-09-2006, 12:41 AM
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#7 | ||
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FF.Com.Au Hardcore
Join Date: Dec 2004
Location: Brisbane
Posts: 976
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got the same knock in mine,(00 fairlane v8) mine is only there when the car is warm and on idle. if i take the rpm up by 500 its gone.
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10-09-2006, 01:02 AM
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#8 | |||
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FF.Com.Au Hardcore
Join Date: Sep 2005
Location: Brisbane
Posts: 3,568
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Quote:
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10-09-2006, 11:02 AM
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#9 | ||
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FF.Com.Au Hardcore
Join Date: Dec 2004
Location: Brisbane
Posts: 976
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yes i have heard it before too. when i was younger and had a lot of GT's i noticed it in a few of them.
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10-09-2006, 12:47 PM
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Fantastic Plastic
Join Date: Jan 2006
Location: Mars most of the time
Posts: 2,019
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If its a knocking sound , not a tapping sound , then i was gonna maybe suggest the bottom end bearings might be the culprit/worn. My old cleveland v8 used to do it badly (after thrashing it hard for a few years ), yet it still ran np for years like that until i sold it ... hehehehe. I just used thicker oil in the end and it shut it up alot .
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10-09-2006, 04:58 PM
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#11 | ||
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78Fury
Join Date: Sep 2006
Location: Hastings New Zealand
Posts: 4
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OK thanks guys will be dropping the oil tommorrow try something thicker. ....like EP 90 eh?
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11-09-2006, 09:25 AM
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#12 | |||
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With da Warlords
Join Date: May 2006
Location: Orange NSW
Posts: 1,781
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Quote:
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You don't have to be faster than the bear, you just have to be faster than the slowest guy running from the bear. For Sale: Parachute. Only used once, never opened, small stain. Windsor Warlords AU III XR-8220  300+ rwhp of Manual fun XR50T Ute - 300rwkw (give or take depending on the day)
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11-09-2006, 10:15 AM
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#13 | ||
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FF.Com.Au Hardcore
Join Date: Jun 2005
Posts: 3,633
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My AU V8 does EXACTLY the same thing .. straight after servicing it knocks and carrys-on for the first thousand K's .. then "seems" to quieten down a bit. If I listen hard at idle I can sometimes (but it's not consistent) hear the knocking when hot; 2 mechanics have also heard it so I'm not going completely mad. Mine has only just started to do it when hot, so I'm just leaving it until it does it more consistently before I attempt diagnosis/rebuild.
If you find a real cause/cure, please advise!  BTW: I got cold/hot oil pressure check to rule out bigend bearings .. hot @idle was about 30psi and at RPM was 65psi .. sounded fine to me? |
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Engine Knock
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