Water Pump Housing Broke Destroying Timing Belt And Valves

[Thakwik1]

I own a 2001 Lexus GS430 with 87,000 miles (3rd owner). I heard some low knocking coming from the water pump area driving to work and only got about four blocks from home when the car died. Took the car in and as I suspected the timing belt broke. Mechanic said it was caused by a weld someone had welded onto the water pump housing. So now I have to get my top rebuilt due to the engine being non-tolerant/interference. I was wondering has anyone experienced anything remotely like this.

[lenore]

That is too weird, welding? It is an aluminum housing....Sure it wasn't an idler that broke and thrashed some metal debris on water pump?

[Thakwik1]

Yes it has aluminum housing. Not sure the mechanic said it was part of the water pump housing.

[lenore]

I don't like the reason why, I suspect an idler failed or the waterpump failed. Both very highly unlikely. I would replace the idlers, timing belt, and waterpump. As for the condition on the valves was there any piston damage.?

[Thakwik1]

He did show me a piece of the water pump housing that broke off. Replace timing belt and tried to crank no compression. What do you think?

[Thakwik1]

As for piston damage I'm hoping not.

[TeamBigShot]

jesus are you kidding me? wow thats a new one for the books honestly... but ha is there piston damage? lol you serious? there is no hope, guaranteed everything mated when that catastrophe happened... things toast for sure..

[Thakwik1]

Ok after nearly two long weeks, 16 exhaust valves replaced,two intake valves, new water pump, heads resurfaced, all new seals and gaskets, new hoses, coolant, oil and filter, sparks plugs, new timing belt, pulleys and tensioners and not to mention $3300.00!!!!! My car runs like a champ!!!! Back on the road!!! BIG UPS TO ELITE AUTO CARE IN PALMDALE CA.