engine vibrating

[smucke]

i changed water pump, oil cooler seals on 1983 944. runs great, but engine in now vibrating. could it be balance shafts not set currect. idles fine. thanks steve

[John_AZ]

If it did not vibrate prior to changing the WP you may have the lower balance shaft pully upside down.

Here is a picture and notice the dark spots on the top of the BB shafts--these are the "shaft Key slots" and they have to be in positions shown. Notice the "U" & "O" on the pullys.



GL
John

[matty89]

Originally Posted by John_AZ

If it did not vibrate prior to changing the WP you may have the lower balance shaft pully upside down.

Here is a picture and notice the dark spots on the top of the BB shafts--these are the "shaft Key slots" and they have to be in positions shown. Notice the "U" & "O" on the pullys.



GL
John

thnx all remember that for when i put mine back together ! u on top O Buttom and aligh it!

[smucke]

o.k going to take apart and ck. thanks

[John_AZ]

Originally Posted by matty89

thnx all remember that for when i put mine back together ! u on top O Buttom and aligh it!

matty89,

Bottom & Top----Right and Left BB pully "U" & "O" are reversed. THAT is the secret

[944 Ecology]

Originally Posted by John_AZ

matty89,

Bottom & Top----Right and Left BB pully "U" & "O" are reversed. THAT is the secret

Yep, U for unter (lower) and O for ober (upper). Remember, a U-boat was under the water.

[krystar]

Originally Posted by 944 Ecology

Yep, U for unter (lower) and O for ober (upper). Remember, a U-boat was under the water.

or if u don't want to learn 944ecology german..
just remember Over and Under hehe