I finished the water pump replacement with the Graf Aluminium pump. Nice pump. As per Qmulus recommendation, I replaced the coolant sensor Oring with OEM. While in the process, I replaced the oil filter housing along with a new oring for it.
I have been running the Graf AL pump for about 10k so not long enough to give a full assessment, but the quality was awesome and very pleased with it.
Graf does make an AL housing pump which I used this last time. Time will tell if it holds up better the the Rein plastic AM one installed in the CC.
Had a better look during weekend and the "substance" in the expansion tank looks and feels like rust particles not oil. It does not feel slick. I'll be replacing the pump with the aluminum Graf unit soon, hoping I'll last more than 100k at least.
I ordered the Graf aluminum water pump kit from ECS Tuning and did the job this past weekend. I'm glad I took the intake manifold off. I did some carbon cleaning while I was in there, I was surprised to see how much build up was in there for a 70K engine. I don't really see how I could have replaced the pump without removing the intake manifold
I went to the dealer and after a long discussion about plastic vs metal impellers (they thought the VW branded pump was metal) a nice gentleman at the dealer ordered me a Graf branded aftermarket pump for $100 Canadian all-in.
I bought this KIT from SHOPDAP and it was a breeze to install. The price at SHOPDAP is great too.
Graf with the metal impeller. No issues.
After researching I decided upon a Saleri pump from World Impex since it has the resin impeller and is 1/4 the cost of OEM. Well, the first one arrived with one of the vanes broken off the impeller. Impex rma'd it, but the second one arrived in even worse shape with a big chunk broken off the impeller. I attribute it to poor packaging.
The stock pump failed back in Feb 2010, so i ordered a GRAF pump with metal impeller from ECS Tuning. Purchase was made on 1/27/10, parts got here on 2/03/10, and I installed pump late Feb 2010. Mileage was 127,257 when pump, timing belt, tensioner were done. In the middle of 2010, a loud grinding started at the front passenger side of the engine. I took everything apart and found the water pump with bearing grease or some waxy chunky crap all over the outside of it and on the inside of the timing belt cover like it splattered, and the pump leaking from the shaft. Car now has 135,362 miles on it, so thats complete pump failure within 8,069 miles.
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