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AuthorTopic: Top end noise 3.9v8  (Read 1959 times)

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Offline big tim

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Top end noise 3.9v8
« on: August 23, 2009, 20:55:23 »
When first started up my v8 rattles from the top end sounds like lifters this only lasts for a few seconds till the oil pressure has built up once running its as normal.My only concern is that it hasn't  gradually  been getting worse but appeared one morning last week. I have changed the oil to a 15w40 mineral and fitted a genuine land rover filter as per normal.The engine has done about 113,000 is this something that i should be concerned about or is it just wear and tear cheers Tim
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Offline generation-x

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Re: Top end noise 3.9v8
« Reply #1 on: August 23, 2009, 22:50:04 »
hi im not an expert on landys
but id guess the oil pump is weak id change is asap

just my opinion

simon
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Offline Range Rover Blues

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Re: Top end noise 3.9v8
« Reply #2 on: August 24, 2009, 00:13:25 »
What oil did you have in before?
Did you use an oil flush?
Did thsi start as soon as you put new oil in or soon after?

What's happening is the oil is draining out of your lifter overnight, it then refills once the engine is running, it' snot a biggy other than one of your lifters leaks a bit.

I'd expect it if the engine stood a week or so but overnight is a bit quick.
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Offline bogie

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Re: Top end noise 3.9v8
« Reply #3 on: August 26, 2009, 21:45:29 »
CAM FOLLOWERS! As they turn they find the flat spot and tap.Sometimes they tap and sometimes they dont.
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1968 SERIES 2A ,200TDI TUNED,RANGE ROVER AXLES,ONE TON SHACKLES,CPC PARAS,ES3000,POLYBUSHED,ANACONDAS.                     1970 SERIES 2A, 200TDI TUNED,5 SPEED LT77 WITH LT230S TRANSFER BOX 1.211 RATIO.ZEUS DISKS ALLROUND.ES3000,MODIFIED 90 TANK,3.5 DIFFS.

Offline big tim

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Re: Top end noise 3.9v8
« Reply #4 on: August 27, 2009, 19:33:21 »
Every thing is fine at the mo past couple of days had no noises whats so ever :D
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Offline JIMBOBLY

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Re: Top end noise 3.9v8
« Reply #5 on: August 27, 2009, 22:14:27 »
Quote from: bogie on August 26, 2009, 21:45:29
CAM FOLLOWERS! As they turn they find the flat spot and tap.Sometimes they tap and sometimes they dont.
i'd say you're bang on there chap,ive also seen this too!
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Offline Range Rover Blues

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Re: Top end noise 3.9v8
« Reply #6 on: August 29, 2009, 23:03:20 »
Quote from: JIMBOBLY on August 27, 2009, 22:14:27
Quote from: bogie on August 26, 2009, 21:45:29
CAM FOLLOWERS! As they turn they find the flat spot and tap.Sometimes they tap and sometimes they dont.
i'd say you're bang on there chap,ive also seen this too!

Eh :-k  I don't understand.
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Re: Top end noise 3.9v8
« Reply #7 on: September 03, 2009, 20:21:29 »
youi got your rattle sorted then tim?
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Offline Range Rover Blues

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Re: Top end noise 3.9v8
« Reply #8 on: September 06, 2009, 15:55:38 »
Been there, done that and it made no difference.  The cam itself has the lobes ground slightly tapered so that the follower runs on one edge, this makes the followers spin.

At cranking speed once you have got the top of the engine off you can see the lifters running on the cam lobes, if they aren't spinning then the cam is worn, fitting new followers will make little difference if any.  You may also see discolouration on the cam lobes themselves and close inspection of the followers might shouw they have worn concave (if this has ahppened then new followers might make a slight difference until they too wear away).

The theory is that a follower which doesn't spin doesn't pick up enough oil to fully extend so the valve clearance can get too wide, hence the tapping.

That's what I'm told.
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Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
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Offline bogie

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Re: Top end noise 3.9v8
« Reply #9 on: September 06, 2009, 20:50:42 »
Thats right mate,the price of a cam you might as well chuck a new one in and get the performance as well as the life outa the job! Its basically false eccomney not to!
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1968 SERIES 2A ,200TDI TUNED,RANGE ROVER AXLES,ONE TON SHACKLES,CPC PARAS,ES3000,POLYBUSHED,ANACONDAS.                     1970 SERIES 2A, 200TDI TUNED,5 SPEED LT77 WITH LT230S TRANSFER BOX 1.211 RATIO.ZEUS DISKS ALLROUND.ES3000,MODIFIED 90 TANK,3.5 DIFFS.

Offline J.D.

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Re: Top end noise 3.9v8
« Reply #10 on: September 07, 2009, 11:55:31 »
Quote from: big tim on September 07, 2009, 11:50:38
Looks like i shall be learning how to do a cam as well then. Can anyone recommend some where to get a cam and lifter set from with remortaging the house lol.

www.rimmerbros.com
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Offline bogie

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Re: Top end noise 3.9v8
« Reply #11 on: September 07, 2009, 20:37:53 »
A cam is no more than £100,followers £40-50 ish.,valley gasket £20ish ,manifold £5ish each.
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1968 SERIES 2A ,200TDI TUNED,RANGE ROVER AXLES,ONE TON SHACKLES,CPC PARAS,ES3000,POLYBUSHED,ANACONDAS.                     1970 SERIES 2A, 200TDI TUNED,5 SPEED LT77 WITH LT230S TRANSFER BOX 1.211 RATIO.ZEUS DISKS ALLROUND.ES3000,MODIFIED 90 TANK,3.5 DIFFS.
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