Earlier 159s had the plastic type of impellers, well the 1.9s for sure.
Mine is a March 2007 build and it had the plastic ones. The people that did the job showed me, they replaced it with the metal version as a precautionary measure when doing the cam belt.
Apologies, old thread.
from what ive read the water pump fails on this engine more than others mainly due to over tensioning of the belt.
On the 1.9 Jtdm it almost wraps around it at 90 degrees which when over tensioned maybe causes stress extra pressure on the bearing.
Well that's what I read, ill make sure I check water pump for metal impellor when I change the belts this year.
Edit: Belts and pump done, last change approx. 60k ago and pump was in good condition as was belt and tensioner.
I didn't check new impellor if metal or plastic as I don't think that is the issue.
Last edited by Bruce100; 05-03-15 at 20:56.