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Topic: 24V Timing Chain Tensioner (Read 2139 times) |
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12reps
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Hi there,
My timing chain has started to rattlle at start up after 136,000 miles. I tried to remove tensioner today but the head of the torx screw looks like it is stripped. Is there any other way of removing the tensioner?
Cheers Allan
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howiedintheplace
Senior Member
Based near Evesham
Posts: 1194
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Re: 24V Timing Chain Tensioner
« Reply #1 on: Nov 12th, 2006, 10:08am » |
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Yeah just undo the 2 bolts & it will come out.
When you turn the torx it compresses the spring, if you don't do that the tensioner will want to spring out of the hole as you take it off but it's not much force so you can hold it with your hand.
I usally fit them without compressing the spring 
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Dave
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wickedteen
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Re: 24V Timing Chain Tensioner
« Reply #2 on: Nov 12th, 2006, 4:16pm » |
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mine has been rattling for ages, i just turn the engine over with out it firing, then it dosnt do it, is there a way of stopping it altogether
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solarpanel
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I love YaBB 1G - SP1!
Posts: 551
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Re: 24V Timing Chain Tensioner
« Reply #3 on: Nov 13th, 2006, 9:30pm » |
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fit upgraded tensioner about £89.00 plus vat from fmd
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Dave
Senior Member
Tourmallard 24v (ex-owner)
Posts: 1984
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Re: 24V Timing Chain Tensioner
« Reply #4 on: Nov 14th, 2006, 7:53am » |
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Can a new tensioner be put on used chains safely?
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Life after the Scorpio ain't easy..
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Dave2302
Senior Member
2006 Mercedes S55 AMG, Retired Barefoot Waterskier
Posts: 1119
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Re: 24V Timing Chain Tensioner
« Reply #5 on: Nov 14th, 2006, 8:42am » |
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Hi,
I'm curious  ,
Ever since I got it (about 12000 miles ago), mine had a slight, (timed at 2 - 3 second), rattle on start up. I spoke to my mate, workshop foreman at FMD, he said don't touch it, it can make them worse.
I changed the oil and now only use the proper Ford Synthetic and genuine filter. After the second oil change I noticed the rattle was much less, (timed 1 to 1.5 seconds), and not every time, mostly only after standing 2 days. I have left it alone and it has got no worse.
However, does anyone know if this modified tensioner really does work, and if so has anyone got the finis code, cos I'd rather not have the rattle at all ! 
Regards
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Dave "The 'ol Bear" ex Footer !
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howiedintheplace
Senior Member
Based near Evesham
Posts: 1194
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Re: 24V Timing Chain Tensioner
« Reply #6 on: Nov 14th, 2006, 11:08am » |
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Basically the tensioner has a one way valve in it.
If you use the wrong/cheap or don't change the oil regular it gums up & allows the oil pressure to drop in the tensioner once the engine is left a few hours. They don't actually wear much.
The uprated tensioner is longer, still has the same valve.
In short it has a longer reach that's all, for when the timing gear gets to the end of it's life as the older version can drop out if extreme.
A proper cure is to strip the engine & clean/flush all the oil ways.
Temporary is to clean the valve on the tensioner or renew.
Prevention is good quality oil regulary changed of the right spec.
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Dave
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12reps
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Re: 24V Timing Chain Tensioner
« Reply #7 on: Nov 14th, 2006, 8:00pm » |
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Hi there,
How much longer is the uprated tensioner and which part of it is longer? Is it just the piston part of the tensioner that is longer? I am currently in the process of modifying my tensioner at the moment, will let you know how I get on.
Cheers Allan
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a900one
Full Member
A scorpio is for life not just for christmas
Posts: 980
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Re: 24V Timing Chain Tensioner
« Reply #8 on: Nov 14th, 2006, 10:07pm » |
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There are two, are you just going to change the off side one. A pair cost approx £185 with gaskets, I am thinking of changing the pair on my 98 cosworth.
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howiedintheplace
Senior Member
Based near Evesham
Posts: 1194
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Re: 24V Timing Chain Tensioner
« Reply #9 on: Nov 15th, 2006, 12:36am » |
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The only tensioner that was uprated was the right one for bank 1.
The big spacer washer is bigger to allow the slightly longer plunger to go back flush & a different spring too. Just means the plunger has a bigger range that's all.
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Dave
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12reps
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Re: 24V Timing Chain Tensioner
« Reply #10 on: Nov 15th, 2006, 5:25pm » |
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Hi there,
I am not changing the offside tensioner, I am only modifying it.
I have no intention of paying over £100.00 for a new one.
To be honest I dont actually know if I have the origonal style tensioner or the uprated one, how can I tell?
Cheers Allan
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howiedintheplace
Senior Member
Based near Evesham
Posts: 1194
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Re: 24V Timing Chain Tensioner
« Reply #11 on: Nov 16th, 2006, 12:11am » |
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The longer later tensioner should have a white mark on it but few have.
You need to remove it to be able to tell.
There is a big chunky washer, if the plunger slides in side that washer it's the later one if not it's the earlier one.
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Dave
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Octavian_P
Senior Member
 
Posts: 1126
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Re: 24V Timing Chain Tensioner
« Reply #12 on: Nov 16th, 2006, 11:41am » |
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Sorry to bug in, but i'm a cosworth newbie, is it possible to take the tensioners out without striping the whole engine out
Cheers
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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12reps
Guest
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Re: 24V Timing Chain Tensioner
« Reply #13 on: Nov 16th, 2006, 1:53pm » |
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Hi there,
I have the offside tensioner out now. The hole in the middle of the chunky washer is about 6mm and the plunger diamter is about 14mm, I guess I must have the earlier style tensioner. I removed the tensioner (problem one) with the engine still in the car although I had to take the alternator off and take the bolts out of the power steering pump bar one so that I could move it forward for access. I am now experimenting to see how I can modify the tensioner.
Thanks for your advice Dave.
Cheers Allan
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camaro
Newbie
I'm a YaBB newbie!
Posts: 12
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Re: 24V Timing Chain Tensioner
« Reply #14 on: Nov 17th, 2006, 7:37pm » |
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Iv just bought a cossie and was wondering what the best engine oil is to put in this sort of engine. I have the famous start up rattle but only when the engine has not been driven for about one day. I have always used castrol gtx in aother cars, is this any good for the cossie. I was thinking of a 5w-30 syn castrol to help aid with the tensioner problem. Any comments, guys?
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a900one
Full Member
A scorpio is for life not just for christmas
Posts: 980
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Re: 24V Timing Chain Tensioner
« Reply #15 on: Nov 20th, 2006, 8:04pm » |
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what is the mod that you are doing .
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deconick
Junior Member
I'm a YaBB newbie!
Posts: 100
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Re: 24V Timing Chain Tensioner
« Reply #16 on: Nov 20th, 2006, 9:34pm » |
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hi mine seems to rattle more now since i put in new oil fully syn, i used to use gtx so im still in two minds wether to change the oil again,hay if what ever oil you use let me know cheers.ps mines done 133000 miles
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12reps
Guest
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Re: 24V Timing Chain Tensioner
« Reply #17 on: Nov 21st, 2006, 12:48pm » |
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Hi there,
I haven't finished the mod yet, I am still trying different things. I will let you know when I am happy with it. My chain started to rattle with the oil that was in the car when I bought it, I don't know what it was. I changed it to fully synthetic but I don't think it made much difference.
Cheers Allan
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a900one
Full Member
A scorpio is for life not just for christmas
Posts: 980
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Re: 24V Timing Chain Tensioner
« Reply #18 on: Nov 22nd, 2006, 5:49pm » |
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I use Halfords fully synthetic and that has made no diffrence, mine has only 85,000 on the clock, but I do the wide open throttle method of starting. The engine runs very sweet when hot even after a 720 mile run.
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howiedintheplace
Senior Member
Based near Evesham
Posts: 1194
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Re: 24V Timing Chain Tensioner
« Reply #19 on: Nov 23rd, 2006, 1:19am » |
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You need to do at least 2 changes within 1000 miles.
First use just some cheapy oil of the right spec then your good stuff.
If that has no effect either:
1. The tensioner valve is not sealing due to oil gunge.
2. Timing gear badley worn or guides broke. (tensioners at limit of operation)
3. Low oil pressure due to wear etc.
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Dave
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