Originally Posted by V12StealthHunter

I think the problem with the airtex pump is that the halves are coming from the factory not torqued together properly. I don't think anyone thinks to retorque the bolts on a new pump but I think this is an important step if you're installing an airtex pump.
Having said that I think the ACDelco design is superior and I would only ever recommend that one.

Originally Posted by DJStronkinson

Does anyone know the proper torque numbers for the two halves of the pump itself? Thanks

Originally Posted by jaggermang

Thought I'd add my experience: Airtex failed on me after 14 months. The impeller completely fell apart.

It happened at the worse time and I was very annoyed. I decided to fork the extra money for an OEM water pump (which had a white impeller, unlike the Airtex) and never look back. It still operates fine after 5 years and 40k miles. I should probably replace it soon, but the point is that the OEM pump is a solid unit. It's worth the extra money, don't waste your time on a $35 Airtex like I did. Not worth the risk

My car is a 1998 XJ8 fyi

Originally Posted by jaggermang

I'd like to clarify my post #34 - it wasn't the Airtex that went out on me, it was the AC Delco unit that I mentioned earlier in the thread. Must have been typing/thinking too fast I apologize if I have caused confusion.

I stand by my statement that you should buy OEM (Airtex) - preferably the dealer if the price is reasonable. Part #AJ88912