OBDI VS OBDII Timing chain differences.

[dylan8]

So I puchased this kit for my OBDI (94) VR:
Volkswagen Jetta III VR6 12v Engine Timing - 021198501 - Ultimate VR6 Timing Chain Kit - ES#8982
Only to be informed there was parts from the later kit that I should run instead

So far I have my sights on this upper tensioner rail:
Volkswagen Jetta III VR6 12v Engine Timing - 021109509E - Timing Chain Tensioner Rail - Upper Chain - ES#268844

But also believe there was a revised lower tensioner or rail? but I cant seem to find the part number difference on the internet. ECS only specify one for across both OBDI and II too

Anyone have any more info or part numbers for the later one?

[JimmyVR6]

OBDI VS OBDII Timing chain differences.

There are two versions of the setup. The early version used a double-row chain, a two-piece tensioner rail (phenolic plate riveted to a metal backing) and a tensioner bolt that relies solely on oil pressure to apply force to the tensioner rail (the bolt has a bleed hole in the end to help regulate the amount of force applied).

Because of an unusually high rate of wear of the upper tensioner rail (many are completely worn through the phenolic to the metal backing plate by 150,000 Km's or so apparently), the upper chain parts were replaced during the '97 model year with an "improved" setup consisting of 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 (spring tension extends the bolt to a minimum length, around 18mm, and then oil pressure extends the bolt to it's final position - this tensioner bolt does not have a bleed hole to regulate oil pressure.)


1997 12v VR6 in Dragon Green

[HaydEn]

^ new kid knows his ****.

I'm unaware of any revised lower setup Dylan.

It's a much of a muchness thing whichever way you want to go you won't be adversely effected.

[JimmyVR6]

^ new kid knows his ****.

I'm unaware of any revised lower setup Dylan.

It's a much of a muchness thing whichever way you want to go you won't be adversely effected.

Hahahah, only because I nearly **** myself when I first found out the VR6 was an interference engine.


1997 12v VR6 in Dragon Green

[dylan8]

HAHA Jimmy I think you quoted that from what I had been reading earlier! is almost word for word!

Cool, figured Id get 100k km+ out of those parts regardless of earlier or late bits anyway

[JimmyVR6]

HAHA Jimmy I think you quoted that from what I had been reading earlier! is almost word for word!

Cool, figured Id get 100k km+ out of those parts regardless of earlier or late bits anyway

The DIY timing chain guide? You'd be right! Ahahahahah. I pretty much memorised that when I was looking at replacing my chains because I had absolutely no idea what I was doing or what I was looking into.


1997 12v VR6 in Dragon Green

[JimmyVR6]

Problem is now I'm crazy skittish because every rattle or otherwise coming from the car itself makes me bend over backwards lol.


1997 12v VR6 in Dragon Green

[HaydEn]

I thought that was the case, plagiarizer! Don't worry about chains so much; I drove around with ones that had worn completely through the tensioner rail and were as loose as a prostitute from Amsterdam.

Yeah exactly. The only problem is making sure you have filled the tensioner bolt right up with oil. And you are good to go.