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Timing Chain replacement part numbers (1997 OBD 2)


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LUK is the standard clutch that is in them. Ive put down GSF part number as i dont know the LUK part number for it and its a place to start from.

This is the info with regards to the chains:

The OBD1 uses a double-row upper chain' date=' a two-piece tensioner rail (consisting of a separate friction plate riveted to a metal backing) and a tensioner bolt that relies solely on oil pressure to apply force to the tensioner rail.

The later OBD2 engines use a single-row chain, a single-piece, dense polymer tensioner rail and a tensioner bolt that uses both spring tension and oil pressure to apply force to the tensioner rail.

Hope that helps

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OBD1s can use the plastic rail and spring loaded bolt. You don't have to replace like for like. I used some mk4 parts doing mine, there is a thread somewhere with all the replacement part numbers.

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  • 3 years later...

Hi brothers,

 

My VR6 12V uses Double upper timing chain system, I purcahsed a new set of Timing chains kit for the coming engine build.

 

However, I discover that there are wrong parts received:

 

1) Upper chain tensioner rail ( yellow color plastic 021 109 509E) is received, instead of existing one  (dark brown metal 021 109 509A)

 

2) Upper piston tensioner with short body/ flat end (021 109 507B) is received, instead of existing one (longer body with a small tip on front end 021 109 507A)

 

Can anyone tell me the above 2 parts are both new updated parts which may directly replace the old ones?

If so, should we replace both at the same time?

 

Best regards,

Joe

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