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Old 25-07-19, 19:42
parakeats parakeats is offline
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Join Date: Sep 2018
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T4 Post Icon 2.5 tdi blew its load (coolant)

1996 2.5tdi , had a recon engine about 2 years ago, believe to be AJT? Have owned for a year

driving today and a loud ticking noise developed from the pulley side of the engine. looked underneath it, nothing obvious so carried on my way. little later the water temp light starts flashing so I stop and take a look, no water in the expansion tank and it's all coming out from the pulley side of the engine.

pull the water cap off and it comes out quicker. It's now back home and in my packing space, dropping all it's water on the floor.

I don't know masses about this engine, or T4s, but I've done engine work on my BMW in the past, so not afraid of a challenge.

Would I be right in thinking it might be the water pump? I'm trying to work out ways to check, I haven't been able to get a good view of where the water is coming from yes as it was still hot.

At no point did the temp gauge go above the midpoint, so I think I got off lightly?

Advice needed on things to check TIA
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  #2  
Old 26-07-19, 14:56
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type4matt type4matt is offline
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Join Date: Nov 2007
Location: Walsall
Posts: 492
Default Re: 2.5 tdi blew its load (coolant)

It does sound to me like the water pump has gone, It's driven by the cambelt and so is in the area you've seen the coolant coming from. I'd get the belt cover off and have a look if it were me. Not much of a job to get the cover off after you remove the alternator belt. I've done it a few times on mine for inspection of the belt.

As for changing the pump, A bit more involved I'm afraid as the 2.5 is tricky to get timed up after the belts are replaced. I don't know if you're aware but there is a belt on the opposite end of the cam which drives the injection pump and it needs to be timed up properly. A job for a "specialist" usually as diagnostic equipment is needed.
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Old 26-07-19, 15:42
parakeats parakeats is offline
Van Man
 
Join Date: Sep 2018
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Default Re: 2.5 tdi blew its load (coolant)

I spent ages earlier this year timing the pump myself, using VCDS lite and duty cycles of the solenoid, annoying I've got to give it ago again though :P

will try and whip it off this weekend see how it looks
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Old 26-07-19, 19:32
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type4matt type4matt is offline
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Sounds like you know the score with the timing. Not done it myself but have seen someone else do it and i know it is a swine. Good luck in finding the coolant leak mate .
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Old 27-07-19, 19:30
badger8v badger8v is offline
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Join Date: Aug 2016
Location: Cardiff
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Default Re: 2.5 tdi blew its load (coolant)

Although it sounds like the pump, assume nothing with these motors. I thought I had the same prognosis a few years back and was sure it was the pump.
Does your fan kick in? mine wasn't and would overheat but the escaping coolant was tracking across the motor and dripping under the power steering pump . It only took a quick wipe of wet n dry on the fan relay connectors (located near the N/S head lamp) and no more issues.
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