Timing chain tensioner replacment??

[jws vr6 0]

I am in the process of rebuilding my engine and was going to to replace all timing chains and guides and tensioners I ordered a load of parts from a vw dealer but when i got them there was no tensioners, just the guides and chains. From reading other posts on here i know the upper tensioner should be replaced but what about the lower tensioner, should i relplace it aswell? and how much does it cost?

And i'll try and post a picture of my upper chain guide, it came off in three bits (and no i didnt break it), anyone seen that happen before??

[jws vr6 0]

Just had another look at the parts i got from vw and the tensioner for the bottom chain comes as part of the bottom cahin guide.

[dubisle 0]

chain guides often break, i've seen it before. Upper tensioner is the oil pressure fed jobby, accesable externally so no need to replace until it packs up!

[kilokilla 0]

be careful with upper oil fed tensoiners if you take the obd1s out of engine you heve to release the pressure in them before putting them back in or they can cause very bad engine damage ive seen them sheer cogs off the chain drive due to pressure not being released to reles pressure in the earlier spec tensioners you noeed to stick something like welding wire in the little hole in the end of the tensioner you will know when you have achieved the right result because it will squirt out some oil and it will squeeze in so its a shorter unit.cheers carl.