Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Bubba on April 28, 2011, 10:34:08 PM

Title: water pump 4.0
Post by: Bubba on April 28, 2011, 10:34:08 PM

is the 4.0 known for water pump failure where the internal impelor fails internally with no leaks or signs  of a problem apart from overheating under load [towing]

Title: Re: water pump 4.0
Post by: loosenup on April 29, 2011, 08:38:46 AM

Hi V8

I had a 95 cherokee xj that did that .. when I got it out all that was left was the spindle. The impeller had totally gone.

Had to take most of the front off to do it also .

Phill

Title: Re: water pump 4.0
Post by: Tragic on April 29, 2011, 02:44:02 PM

The pump on my old YJ corroded from the inside out. When the impeller disintegrated it punched a half inch hole in the housing. In roadworks. In evening rush hour. In the centre of Geneva....... :icon_redface:

Title: Re: water pump 4.0
Post by: Panic mechanic! on April 29, 2011, 02:55:25 PM

I am sure I have seen a good few stories of impellers corroding excessively on the old 4.0

Title: Re: water pump 4.0
Post by: Dave69 on April 29, 2011, 05:44:40 PM

had the impellar grind it's way out on the housing, no play or side movement in the unit either, so work that one out

Title: Re: water pump 4.0
Post by: Bubba on April 29, 2011, 05:50:14 PM

long shot but anyone know off hand if the 4.0 and 2.5 water pumps are the same ?

Title: Re: water pump 4.0
Post by: Dave69 on April 29, 2011, 05:58:26 PM

the 2.5 diesel is different but then you know that already LOL

petrol sorry cant remember at this point

Title: Re: water pump 4.0
Post by: Panic mechanic! on April 29, 2011, 06:00:34 PM

I don't beleive they are, there is one sitting on the 4.0 outside the house I am going to have to change to fit into the yj if its any use to ya.

Title: Re: water pump 4.0
Post by: Jonny Jeep on April 29, 2011, 08:03:48 PM

Water pump is the same for petrol 2.5 and 4.0 engines. Just cross referenced the part number for the one I fitted last weekend. No sign of impeller wear or bearing play on the old one, so it must have just been the seal.

Title: Re: water pump 4.0
Post by: Mike Pavelin on April 29, 2011, 08:29:02 PM

The 4.0 XJ water pump is different to the 2.5.

Title: Re: water pump 4.0
Post by: Bubba on April 29, 2011, 08:30:34 PM

phew thanks mike any chance of a heads up on the right one  ?    92 xj

Title: Re: water pump 4.0
Post by: Panic mechanic! on April 29, 2011, 08:44:58 PM

ok if the one on the engine outside ain't good enough for ya  :wave-fingersmiely: :lol_hitting:

Title: Re: water pump 4.0
Post by: Bubba on April 29, 2011, 08:46:36 PM

sorry dood i thought you were going to use it

Title: Re: water pump 4.0
Post by: Panic mechanic! on April 29, 2011, 08:50:48 PM

nah its not use as i got to change over the whole power sterring setup from the 4.2 so  if you want it its yours.( it was off a 92 as well)

Title: Re: water pump 4.0
Post by: Bubba on April 29, 2011, 08:52:06 PM

any idea of miles

Title: Re: water pump 4.0
Post by: Panic mechanic! on April 29, 2011, 09:01:06 PM

its about 8 miles from you to me and the engine had about 80k on it

Title: Re: water pump 4.0
Post by: Bubba on April 29, 2011, 09:32:31 PM

anyone know how much new ones are the skin flint says yes the mechanic says no buy new and do it once

Title: Re: water pump 4.0
Post by: Panic mechanic! on April 29, 2011, 09:36:27 PM

on ebay £40 -£50

Title: Re: water pump 4.0
Post by: supersparks on May 01, 2011, 06:47:23 PM

i bought a dealer part 6 years ago and paid £82.00