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Engine oil pressure operated hydraulic timing chain tensioners don't work properly from too old oil
Posted by: quatsync (11848) on 2018-01-28 08:26:14 In Reply to: Details? posted by UrS4boy on 2018-01-27 17:35:00	Share \| Report

- even if the required synthetic oil was used - caused the early version of the upper chain to stretch. Valve timing gets out of whack - beyond adjustment limit, engine misfires at idle. Needs a new upper chain. There's a stronger version of the upper chain. They made a running change to the newer version at some point relatively early on. Most of those 20v I5s are very strong. Brake vacuum pumps and oil filter housings leak oil. That's about the worst of it. Oil breather diaphragm rips. Big vacuum leak. Can be replaced without replacing the whole valve cover.

Thread:

Butofcourse, we've known this for 20 years - airbil 2018-01-26 17:10:11 (556 views)
- Ugh, the stupidity in the comments section is mind blowing........ - SpeedTek 2018-01-31 10:53:46 (209 views)
- BTW 5 cyl Rabbit not too bad either! OT - stuffinder 2018-01-27 09:15:25 (332 views)
  - I enjoyed my MkV Rabbit more than my MkVI GTI - AudiSport4000 2018-01-29 01:01:10 (248 views)
  - Lol we have one too as our beater. - running_cold924 2018-01-27 09:39:44 (341 views)
    - I have two I5 VW cars - trouble free - one has 120k miles on the clock - never had an issue... - chiil 2018-01-27 10:44:07 (314 views)
      - We've seen a few of the early versions here with a broken valve - AudiEd 2018-01-29 11:06:39 (246 views)
      - And the timing tensioner issue was mostly caused by VW's 10k mile oil change interval.   -  Rennkafer  2018-01-27 16:43:42 (262 views)
        
        Details?   -  UrS4boy  2018-01-27 17:35:00 (246 views)
        
        Engine oil pressure operated hydraulic timing chain tensioners don't work properly from too old oil  -  quatsync  2018-01-28 08:26:14 (306 views)
        
        Correct - I believe the crossover occurred around late 2007   -  chiil  2018-01-28 10:53:25 (227 views)
- Some people are just slower than others... - running_cold924 2018-01-27 07:36:00 (281 views)

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