Peugeot 505 Turbo ::
505 Technical :: Peugeot 505 Turbo Timing chain tensioner guide
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The winklofer timing chain tensioner used on the Peugeot 505 Turbo's is a
tricky device, and unfortunately has a huge price if delt with improperly.
As the chain streches, the tensioner will ratchet out and keep a constant load
on the chain, regardless of how short or long it is. The factory manual suggests
'locking' the tensioner when removing the cylinder head. If the tensioner isn't
assisted during the cylinder head removal procedure, it's possible for the
tensioner to ratchet apart and drop into the oil pan. This of course makes the
job much bigger then it should have been in the first place.
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To gain access to the timing chain tensioner, you'll need access by removing the Air Conditioning compressor. Once this is done, you should be able to get access to the 12mm brass plug shown below.
- Snap-On 12mm 3/8th drive 12mm Hex socket driver $22.95
- Armstrong 12mm 1/2in Hex socket driver $16.99
- Craftsman 12mm Hex key $7.99
Tools Required
- 12mm hex key or socket
- Flat head screwdriver
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Remove the brass access plug show to the left |
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At this point, you can see the tensioner, and the screw your going to need to access. |
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It's important to use a good flat blade screwdrive, that fits well (Snap-on #1 shown left). The screw your turning is not strong, and does not have a lot of material in case excessive force is used. :-p |
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This is a picture of the tensioner with no front timing covert installed. |
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Push in until you feel the set screw bottom out |
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Once the set screw is fully compressed, hold it down, and turn the set screw clockwise to retract the tensioner
** NOTE: Do not use excessive force when loosening the set screw. **
It's easy to break the set screw, which makes this job much more complicated (as you can see from the images below):
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Keep turning clockwise until you feel the set screw stop. There may be some resistance, and notchyness, but you will know when the set screw is locked, and the tensioner fully retracted. At this point, the tensioner is locked, and you can remove the screw driver.
Re-assembly is fairly straight forward. Simply 'release' the tensioner by turning the set screw counter clockwise until the tensioner is fully decompressed. At this point, the tensioner should ratchet into place, and is good to go.
Below is a breakdown of the tensioner assembly:
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