Last update:

08/03/2005

  Timing Chains 2.9 24V

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The timing chains on the 24V are subject to significant wear over the life of the engine and at around 100,000 miles some thought should be given to their replacement before one of them snaps and causes further damage. A TSB was issued on this engine to replace the tensioners (labelled 15 above) to prevent startup rattle however it is uncertain as to how many vehicles will have had this work done. There is also some concern that garages may not be following the correct procedures and as it is critical that the correct procedure is followed we have obtained the following document to assist. Click to download.

Steve Collister replaced his own Timing Chain on the 24V Cosworth engine and provides FINIS part numbers and prices (11/01)

He had a problem on the car from when he bought it - a rattle coming from the front of the engine and diagnosed as a timing chain problem. It appears that all 24Vs are prone to a short rattle from start which normally lasts just a couple of seconds. There is a TSB for this problem and the Ford time estimate is only a couple of hours so well worth getting a Ford dealer to replace the tensioners at an early stage if possible.

Steve's car at first would only do it when very cold and then only for a few seconds. We would recommend anyone who hears this noise to get it sorted asap as if left can cause a lot of damage and the fault lies with the RHS Cam Chain Tensioner.  
He left his and it got worse and worse until it was noisy all the time and the oil pressure light was coming on.
 
Just changing the tensioner now was not enough as their was still no oil pressure. Also whilst he had the rocker cover off he could see a broken piece of plastic resting in the engine which turned out to be one of the chain guides.
 
He started stripping down the car to effect a repair.
 
This is a major job and took him 3 solid days just putting everything back together once he had stripped it down to gain access to the timing chain and guides.
 
You will need some special tools to do some of the jobs, he made these himself so if anyone needs more info he can supply this - contact him via the Mailing List
 
Basically to gain access to the chain the following requires removing.

Plenum Chamber
Rocker Covers
Starter Motor
Alternator
A/C Pump
Power Steering Pump
Sump
Timing Cover
Water Pump
Radiator.

 
He did all the work on his driveway and found the hardest part was fitting the sump gasket which is in 4 pieces and difficult with the car only raised on axle stands.
 
The parts he replaced were both tensioners and chains the guides although some were probably ok, the sprocket that drives the oil pump as all the teeth had worn off, and numerous gaskets. He also had to remove broken plastic bits from the oil pickup strainer and from inside the sump.
 
It is strongly recommended that whilst doing this work it is worthwhile changing all camshaft sprockets as well if you are doing the chain.

NOTE: There was one cam chain guide that he was unable to get. It was the one that is tensioned by the drivers side tensioner and he got the dealer to get it twice but each time got the wrong part. In the end he re-used the old one. The part number is 1008390 but as I say ordered it twice but no joy.

If you find any of the guides have broken (one of his had) then take the oil pump suction pipe off and check for bits and clean it out. He also had small filings in the sump from all the teeth of the oil pump sprocket that had gone.

 

Part    FINIS Number Quantity Price ex VAT Comment
Plug Oil Drain  1663906 1 1.22 Get this unless you have recently fitted a new one
Gasket - Oil Drain Plug 1454118 1 0.18 I think you will get this with the sump gasket kit but handy for next oil change anyway
Cam Chain Tensioner RHS 1049826 1 53.94 Get this if you are doing the tensioners and chain.
Driving Belt PAS Alternator 7310607 1 13.57 Recommend doing this as you have to take the old one off anyway.
Gasket Chain Tensioner RHS 7334674 1 1.06 Get this if you are doing the tensioners and chain.
Gasket Sump 6643926 1 21.61 Essential
Belt Driving AC 7082866 1 8.35 Recommend doing this as you have to take the old one off anyway.
Oil Seal Crank Front 7334625 1 9.10 Essential
Guide Cam Chain 1008459 2 5.93 Get this if you are doing the tensioners and chain
Guide Cam Chain 7334661 1 7.26 Get this if you are doing the tensioners and chain
Guide Cam Chain 1008399 1 6.06 Get this if you are doing the tensioners and chain
Guide Cam Chain 7334660 1 7.26 Get this if you are doing the tensioners and chain
Tensioner Blade - Cam Chain 1008390 1 19.71 Get this if you are doing the tensioners and chain
Cam Chain 1049824 2 34.31 Get this if you are doing the tensioners and chain
Gasket Tensioner 7334674 1 1.06 Get this if you are doing the tensioners and chain. Do not attempt reassembly without these (learnt from bitter experience)
Oil Filter 5024424 1 4.02 Essential
Anti Freeze 3.0L 1047051 1 9.73 Essential
Anti Freeze 1.0L 1047034 2 6.70 Essential
Cam Chain Tensioner LHS 7334668 1 53.94 Get this if you are doing the tensioners and chain.
Gasket Water Pump 1644432 1 4.11 Essential
Tensioner Blade - Cam Chain 1008387 1 19.71 Get this if you are doing the tensioners and chain
Engine Oil 1009366 1 29.66 Essential
Sprocket - Oil Pump Aux Drive 7334662 1 31.21 Get this if you are doing the tensioners and chain and it has been rattling quite bad.
Gasket Timing Cover 7334600 1 16.72 Essential
Gasket Inlet Plenum Chamber 1006844 2 1.97 Essential - you will need two of these
Cam Chain Guide 1008390 1   SEE NOTE ABOVE

And this is what happens if you don't repair the problem early enough
New engines are available from Ford for approx 7000!

 

 

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