Rough Idling issue (updated) 1.8T (163)
Hi Guy's, just thought i'd give a quick update for future reference if needed on the issue i have recently had with the rough idling on my 1.8T (163) BFB. Found the cause to be the Crankcase breather valve that had perished inside and possibly the Breather tube that had seen better days and was a right pain in the backside to change. What a difference these parts i have changed today have made and at £61 it was worth it.:yes:
1) Faster starting from cold
2) Engine idling smooth and quieter
3) Throttle alot more responsive
4) Overall quicker
5) Stopped oil leak (bonus)
Parts changed for future reference below
1) Vacuum valve 06A 129 101 D
2) Crankcase breather valve 035 103 245 G
3) Crankcase breather 3 way housing 06a 103 247
4) Breather tube from crankcase 06A 103 213 F
I have probably gone on a bit but i hope some people will find this wright up usefull and save them a few hundred quid.
- Take all associated pipework off a give a good clean (mine were caked with crap).
- Remove header tank for easier access.
- Remove all hose crimp clips and replace with proper hexagon /screw top ones
- If like mine the breather tube from the crankcase is perished the metal sleeve will come out first and leave bits of plastic in the surround which still are not possible to get to by hand (i don't have sausage fingers but i was struggling). I used a long flat head screwdriver poked through the top of the inlet manifold and a hoover and modified the end with a bit of hose pipe, you can then loosen the remaining plastic with the screwdriver and have the pipe form the vacuum on it at the same time to save the plastic dropping in the crankcase.
- Use plenty of washing up liquid or oil to get the new pipework and fittings back into place because with the limited space available you end up struggling and getting frustrated. I suppose you could remove the inlet manifold and the job would be easy but why create more work.
- Finally make sure you put the crankcase breather tube clamp back into position.