valve clearance BELOW spec.. Fixed!! No harm done.

[Beedub]

take a trip over to my side of the pond.....

http://www.z4-forum.com/forum/viewtopic.php?f=9&t=81492


anyone got anything they can add to this???

cut a long story short 1 inlet shim is too tight on clearance, please check video in that thread!

[MarkMcL]

Sorry to see this, Byron. Nothing to add other than you guys across the pond sure are a chatty bunch! Lol!

[Beedub]

yeahhhh pretty sad But.... its nearly a decade old.... shit goes wrong. their is currently no damage and its super smoothened quiet, obviously i won't be running the car again for a significant period until this is addressed.

but right now, she's sitting pretty, safe and sound, running smooth as ever.... just got alittle hitch to deal with.

people are dining out their, i have a problem with my sports car... its not the end of the world.

[dc_wright]

Used to see that on air cooled VW engines, but mainly on the exhaust side. It was typically valve stem stretch due to the extreme heat. Hard to believe you'd see that in the intake side of a water cooled engine, so that leaves valve seat wear as the possible suspect? The only other thing I can think of is some small debris has gotten trapped under the shim.........

[Beedub]

valve seat wear on a 12k mile engine inlet valve??? very unlikely but possible!!

[inTgr8r]

Also curious that it's only one valve.
If it was due to valve seat regression, you would think that there would be more than one.

Was this particular shim replaced previously? (Possibly incorrectly)
...sorry just remembered that there was no report from Simpson.
Still, a possibility

[Beedub]

hi ian, all updates are in the link thread, as its got more hit over that side I've been spending most time their... :-)

i agree with your direction however... I'm pretty certain that replacing the shim with a smaller one will see this fall back in line with the others, I'm going to replace it MYSELF, as i feel i need to learn alittle more about this process! i will be checking myself yearly from now on.

[inTgr8r]

...i'll jump over

[Beedub]

SORTED this myself :-) all went well, see original thread on z4forum if interested :-)

[RobMCoupe]

I sure will go through all 14 pages when I have time. Glad it worked out for you.

[Beedub]

Originally Posted by RobMCoupe

I sure will go through all 14 pages when I have time. Glad it worked out for you.

turned out to be nothing major thankfully, I've also gain some real solid know-ledge and was able to shim check myself , I'm now more than confident to this yearly as interim checks :-) which i will be doing


ECS tuning kits they put together literally saved my balls here!!!

[RobMCoupe]

I downloaded from Internet the two files attached. Rename "S-54 Valve Adjustment Schedule" extension to xlsx to track the history in spreadsheet. I print out the pdf and write down the values and transfer it over to spreadsheet. Just add a sheet each time to record the shims replaced and have an idea the current values for next adjustment.

[Vanne]

great news Byron, very happy for you man

[Beedub]

Originally Posted by Vanne

great news Byron, very happy for you man

very happy for myself tbh!! lol!!

next up i may attempt the rod bearings.!!!!!!!!