LS - 3rd Gen (2001-2006) Discussion topics related to the flagship Lexus LS430

Water pump inspection

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Old 09-15-17, 02:11 PM
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Bocatrip
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Default Water pump inspection

Approximately how much time and effort would be involved in pulling back or removing the cover enclosing the water pump to inspect it properly?
Old 09-15-17, 05:00 PM
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bradland
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A LOT !
Several pieces have to come off and they are stacked so to get down where you need to see everything above has to come off first. Starting with the cam pulley covers down to the accessory tensioner and various other timing covers. Radiator hoses, fan bracket, small coolant bypass lines etc. You may be able to leave the crank pulley on along with the plastic timing cover directly behind it but if you really want to see the entire water pump everything short of the timing belt itself needs to be removed. Leaks at this level are pretty easy to spot as the red coolant creates a pink crud that's very easy to trace back to the source. I'd get underneath and do a careful thorough inspection with a good light before I started ripping the front of the engine apart...

Old 09-15-17, 05:06 PM
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Bocatrip
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Originally Posted by bradland
A LOT !
Several pieces have to come off and they are stacked so to get down where you need to see everything above has to come off first. Starting with the cam pulley covers down to the accessory tensioner and various other timing covers. Radiator hoses, fan bracket, small coolant bypass lines etc. You may be able to leave the crank pulley on along with the plastic timing cover directly behind it but if you really want to see the entire water pump everything short of the timing belt itself needs to be removed. Leaks at this level are pretty easy to spot as the red coolant creates a pink crud that's very easy to trace back to the source. I'd get underneath and do a careful thorough inspection with a good light before I started ripping the front of the engine apart...

ok... understand.. it's not an easy fix. To check the water pump is close to replacing the timing belt right? I'm not going there. at this time no coolant is leaking.
Old 09-18-17, 06:55 AM
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PearlUni05
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I wouldn't either @ Boca. I would just do the timing belt/H20 pump at its interval and call it a day. Just my .02
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