 | Home > Puma (Tdci) > 2.4 coolant tank getting pressurised |
 
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| neon1991 Member Since: 26 Mar 2018 Location: Colchester Posts: 74   
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I’ve just been out and noticed that the level was down about an inch from the cold fill level, opened the cap and the velvet returned to the normal mark. I put a pressure test set on it and pumped it up to about 15psi and it held without issue. Noticed that on doing this pressure tests that the expansion bottle had pretty much nothing in it when at 15psi.. all comes back when you release the pressure.
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1st May 2022 8:05pm |
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| Likeomg Member Since: 29 Jun 2012 Location: Lake District / Newcastle Posts: 2626 
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head......
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1st May 2022 8:13pm |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3186  
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Means that there is air somewhere in the engine, radiator... well somewhere in the system. Air is compressible, liquid is not. So when you pressurize to 15psi, the volume of air practically becomes half of what it was before. Where the air inside the system came from? I am afraid answer might have already been given. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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1st May 2022 8:18pm |
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| Greyman110 Member Since: 29 Sep 2017 Location: London Posts: 323
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Very similar to an issue I had with mine.
https://www.defender2.net/forum/topic75278.html Was the head gasket in the end. |
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1st May 2022 8:30pm |
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| neon1991 Member Since: 26 Mar 2018 Location: Colchester Posts: 74
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Cheers guys. Yep greyman110, sounds exactly the same as your issue. Going to drop it into my local Indy and see
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1st May 2022 9:35pm |
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| Big Harold Member Since: 09 Jul 2018 Location: nsw Posts: 71  
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EGR Cooler could have a pin hole in it.
Just loop the hose to remove from the cooling circuit to test. Mark |
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1st May 2022 11:36pm |
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| neon1991 Member Since: 26 Mar 2018 Location: Colchester Posts: 74
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Bit of an update. Went to my local Indy and they thought the same as me (head gasket). Couldn’t find any evidence of coolant loss other than the expansion tank. We were both stood there for a while trying to work out what it could be. Sniff test is negative.. top of the rad hot, cold at the bottom. New thermostat etc. they said that rather than doing the head gasket I’d be better off looking for a good 2nd hand unit. 🙄. Out of desperation before I drop a chunk of change on a recon. I had a good prod about tonight and found this. Wondering now if the pump is just the culprit! Would explain the lack of flow coming back to the header tank other than steam. I’ve ordered a new pump and an egr cooler just in the hope it’s not a head gasket fail
 Click image to enlarge Click image to enlarge |
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3rd May 2022 9:23pm |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1736
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Definitely worth a go, and water pump could well be the culprit, unless it’s leaking due to the pump gasket being under too much pressure due to a head gasket issue
The egr cooler issue seems to be more with the 2.2 than the 2.4, but again could be the culprit. At least trying these first is the cheaper option than a head gasket change. Obviously a cost risk if it turns out not to be water pump or egr cooler, but one I would likely take in your position. If doing it yourself I would suggest doing the temporary egr cooler bypass first by joining the in and out pipes and see if that changes things, if it does then buy and replace cooler. If not change the water pump and see if that works. If indi doing work it may be cheaper and quicker to do all at once rather than separately. Having said all that it does point to a head gasket. Seems your indi is not keen to change it, or thinks the cost is prohibitive, but if done properly by someone who has done before and knows what they are doing it will be cheaper than another 2.4 engine , unless there are other reasons to change the engine. |
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3rd May 2022 10:59pm |
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| neon1991 Member Since: 26 Mar 2018 Location: Colchester Posts: 74
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No other reason to change it other than it has 140k on it. To be fair if I was paying my Indy to do it then I’d probably just go for another unit. Most of the engine is free to pull by the time you e stripped the head. Daft design but hey.
I thought the same about the shaft seal it might have just been under too much pressure… we shall see I guess. I’ve got a stripped recon waiting for me to pull the trigger but I really don’t want to go that route if I don’t have to. The stipulation of the new engine is that water pump, vac pump and oil cooler need to be new so I’d be days away from ordering anyway. If it’s no good then I’ll be starting the strip down and nabbing my new bits back 😂 |
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4th May 2022 7:32am |
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| neon1991 Member Since: 26 Mar 2018 Location: Colchester Posts: 74
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didnt bother messing about as time was against me so swapped the engine out for a lower mileage 2.4 unit. running like a good one again
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6th Jun 2022 11:55am |
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