Vvt pulley refurbishment

tony da · Apr 29th, 2015, 19:17

Just replaced my vvt pulley had the dreaded brr brr tick. Working in engineering it does not sit well for me to say it's broken having spent most my life repairing broken things.

So decide to strip down my old pulley to refurb was going to post pics but there too big for forum attachments. The bolts holding together have security head could not find the right socket. So made do with the tools I had the bolt are just outbound m6 x 16mm and the inbound are m6 x 35mm flanged will replace these with normale hex heads as security heads only there to prevent you seeing the internals.

Stripped and cleaned the parts with a seal in degreaser then the internals are soaking in a acetone bath for a week a lot of detritus coming out of internal passages which is a common cause of failure internal passages being blocked.

Would have posted photo's but tried to up load and seem to be too large.

gatos · Apr 29th, 2015, 19:36

You need to resize them. If you still can't manage you can email them to me at gata958e (at) googlemail (dot) com and I'll resize them

tony da · Apr 29th, 2015, 20:49

Quote:

Originally Posted by gatos

You need to resize them. If you still can't manage you can email them to me at gata958e (at) googlemail (dot) com and I'll resize them

OK thanks I'll have a go resizing tomorrow.

magnuz · Apr 29th, 2015, 22:02

When i took mine apart, i thought that the wear was at the point where the vanes make contact with the outer part

skyship007 · Apr 29th, 2015, 22:42

Quote:

Originally Posted by tony da

Just replaced my vvt pulley had the dreaded brr brr tick. Working in engineering it does not sit well for me to say it's broken having spent most my life repairing broken things.

So decide to strip down my old pulley to refurb was going to post pics but there too big for forum attachments. The bolts holding together have security head could not find the right socket. So made do with the tools I had the bolt are just outbound m6 x 16mm and the inbound are m6 x 35mm flanged will replace these with normale hex heads as security heads only there to prevent you seeing the internals.

Stripped and cleaned the parts with a seal in degreaser then the internals are soaking in a acetone bath for a week a lot of detritus coming out of internal passages which is a common cause of failure internal passages being blocked.

Would have posted photo's but tried to up load and seem to be too large.

YEP, VVT units are just like turbo's, they hate bad oil and oil that causes sludge or varnish deposits in particular.

There are two ways of keeping a block clean.
Firstly use a real good major brand full synthetic that is a good cleaner.
The best common one is Shell Helix Ultra 0 or 5w40 (Must be Acea A3/B4), although Mobil 0w40 is also a good cleaner that has lots of detegent additive included.

Secondly use an idle only flush additive just before an oil & filter change, although this is not a good idea if the engine has any oil leaks, as it might make them worse for a while.

Obviously the detergent and dispersant additives in the oil run out (They also fail if there is any anti freeze in the oil), so too long an OCI is bad news.
Varnish deposits can also be made worse by overheating.

https://pim.liqui-moly.de/pidoc/P000...oiladb=web.nsf

tony da · Apr 30th, 2015, 17:49

These are the photos of parts wit seals which were cleaned in degreaser.

tony da · Apr 30th, 2015, 17:56

Here are the photos of the internals and the acetone bath and all the gunk it has removed from the internal parts.

druid · Apr 30th, 2015, 18:22

Quote:

Originally Posted by tony da

Here are the photos of the internals and the acetone bath and all the gunk it has removed from the internal parts.

Perhaps it would be good for those who want to save future troubles?

tony da · May 1st, 2015, 20:31

Here are the photo's of the rebuild of the vvt pulley after the soak in the
acetone bath and seen all the detritus. I decided to look further and remove the vanes small retaining spring keeping them in place. No sign of wear on any of the machined faces. So decided to rebuild vvt as the most obvious point of failure has been blocked internal passages.

tony da · May 1st, 2015, 20:34

Well rebuild complete going to put away as spare part and have all confidence in the findings.

Apr 29th, 2015, 19:17	#1
tony da Junior Member Last Online: Jun 22nd, 2015 19:51 Join Date: Dec 2010 Location: Hartlepool	Vvt pulley refurbishment Just replaced my vvt pulley had the dreaded brr brr tick. Working in engineering it does not sit well for me to say it's broken having spent most my life repairing broken things. So decide to strip down my old pulley to refurb was going to post pics but there too big for forum attachments. The bolts holding together have security head could not find the right socket. So made do with the tools I had the bolt are just outbound m6 x 16mm and the inbound are m6 x 35mm flanged will replace these with normale hex heads as security heads only there to prevent you seeing the internals. Stripped and cleaned the parts with a seal in degreaser then the internals are soaking in a acetone bath for a week a lot of detritus coming out of internal passages which is a common cause of failure internal passages being blocked. Would have posted photo's but tried to up load and seem to be too large.

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