obd mixup?

[tonk 0]

A few months ago my obd2 vr engine with 106k miles went BANG!

So i got a replacement sorted from a R reg highline even got to see and hear it running...all was good, picket it up a few days later after it was removed for me. anyhoo alls been fine till yesterday when a large tapping banging sound straight from startup.

Iv taken the rocker cover off to find twin chain's........from a obd1??????

Now im not stupid and i know iv been done over and this will be sorted out seperatly(sp?)....I KNOW WHERE YOU LIVE :@

What i want you kind and caring people to tell me is how come the engine is running with a coilpack? what has been changed for it to work?

I must say it is (was) a lot faster the my old engine and quiter too.

Now my wife is sooooooo pisssed off with it always going wrong se wants shot of it....and at the moment im with her.

[Dave Lea 4]

odb2 can have twin chanes mine has ond have seen others to with twin chanes to

[vdubz 0]

Hi this might be a stupid answer but im guessing this is what your asking, some obd1 do have a coilpack as i have one on mine so thats not wrong.

also good look sorting it out

[Phat VR6 3]

my 97 obd2 also has twin chains and coil pack. Think it would be two much work to put a obd1 engine init

[tonk 0]

i was under the inpresion all coilpack engines were single width top chain obd2's and the double width top chain's were obd1's.

so you lot are saying that i might not have been ripped off?

[Dave Lea 4]

sounds like it mate

[tonk 0]

sounds like it mate

the best news iv heard all year!!

[Dave Lea 4]

do u no what is up with it yet

[VR6_Absy 0]

Mines OBD1, double width chain and coil pack

I got a bit of everything lol

[jezmoz 0]

anything before engine number AAA217001 will have double chains

[gav_113 0]

its easy to swap from single to dimplex chains.. i converted my obd2 head..

[UnitedMotorsport 55]

Its a miss-conception that OBD2 engines are simplex chains

the ONLY VW stipulation is that they changed from duplex to simplex chains at engine number 217000 as mentioned earlier. Engine number 217001 was fitted after the change from OBD1 to 2.

[tonk 0]

ah ok then thanks all, i found whats left of the tensioner guide......it was soooo thin that it snaped off 2/3rds of the way down, that left the tensioner bolt thing that keeps the chain tight pushing up against the chain......not good!

[gavinvr6 0]

you may find that you also have the larger size throttle body. its practically the same size as the rado one but has the restriction bump just infront of the butterfly. if you check it against a obd2 tb you will be supprised by the difference. i had the same confusion on my 93 golf, had coil pack but was obd1. these engines do feel better than normal due to this usually. im not sure why they are like this but they rev very freely and are not as sluggish low down like a normal vr with a harder kick kick when it comes into its power band

[tonk 0]

cool, il have a look at my TB later. I know it needs a good clean. This engine does feel alot smother then my last.