Home > Technical (L322) > porous block. Coolant leak. As much help as possible please. |
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Jamiehol Member Since: 26 Sep 2014 Location: Ipswich Posts: 226 |
Edited it my post to make it clear was being very lazy when I said burnt. |
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22nd Oct 2019 6:20am |
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dazza1983 Member Since: 19 Feb 2019 Location: southampton, hampshire Posts: 529 |
So how would the coolant getting into the cylinders? And what test can be done to figure out if this is the case? Cheers Regards Daz ------------------------- 2011 (61plate) 4.4 tdv8 sumatra black previous cars e46 m3 e53 x5 |
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22nd Oct 2019 7:03am |
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UK Marine Member Since: 22 Jul 2016 Location: Durham, County Durham UK Posts: 830 |
If it is a porous block the coolant wicks it’s way through the block material and into the cylinder walls, on the old 4.6 P38’s the only solution was to fit ‘top hat liners’ to each cylinder.
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22nd Oct 2019 8:34am |
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dazza1983 Member Since: 19 Feb 2019 Location: southampton, hampshire Posts: 529 |
So im going to pick the car up soon, no coolant found in the sump at all, and they have checked pipes, and egr cooler and oil cooler etc.. So im kind of at a loss now..
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22nd Oct 2019 9:13am |
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AndyW970 Member Since: 14 Aug 2019 Location: Hampshire Posts: 4 |
Had coolant loss issues on a number of V8 Classics with the 3.9 engines - turned out to be coolant getting past head gaskets into the cylinders. To diagnose I found that along with a compression test , taking a look in the cylinder with a boroscope showed the face of the piston in the effected cylinder to appear like it had been steam cleaned compared to the good cylinders. One I had did pressurise the cooling system with combustion gasses (quite spectacularly) the other didn’t. Not sure how easy it is to get a look into the diesel V8’s as I’m new to these engines but I’d have thought you could get a look in by removing the glow plugs?
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22nd Oct 2019 10:01am |
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Jamiehol Member Since: 26 Sep 2014 Location: Ipswich Posts: 226 |
Either through a crack in the head or block or a head gasket failing at a water way into the combustion chamber. Test wise a sniff of the coolant with a sniff tester would be a start to see if there is combustion gases in the coolant. |
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22nd Oct 2019 10:25am |
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dazza1983 Member Since: 19 Feb 2019 Location: southampton, hampshire Posts: 529 |
Sniff test was done and came back ok.. Regards
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22nd Oct 2019 11:20am |
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dingg1 Member Since: 29 Jun 2013 Location: PORTUGAL Posts: 1348 |
So you either have a tiny leak externally which is not apparent on the myriad of possible places it could be observed readily on or you have a small leak into a cylinder.
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22nd Oct 2019 11:50am |
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dazza1983 Member Since: 19 Feb 2019 Location: southampton, hampshire Posts: 529 |
Ive ordred some UV dye and im going to put that into the coolant and see what happens,
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22nd Oct 2019 12:08pm |
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dingg1 Member Since: 29 Jun 2013 Location: PORTUGAL Posts: 1348 |
Good luck.
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22nd Oct 2019 12:27pm |
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dazza1983 Member Since: 19 Feb 2019 Location: southampton, hampshire Posts: 529 |
I don’t know anything about this k seal or other leak stoppers. Are they safe to use or are they a bodge? Regards Daz ------------------------- 2011 (61plate) 4.4 tdv8 sumatra black previous cars e46 m3 e53 x5 |
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22nd Oct 2019 12:54pm |
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DrRob Member Since: 16 Apr 2015 Location: Petersfield, Hampshire Posts: 4308 |
Bodge in my book. Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
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22nd Oct 2019 2:20pm |
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nicedayforit Member Since: 11 Jun 2011 Location: Beside the Solway Posts: 3979 |
I would just drive the car and keep checking the coolant level daily when cold and see what happens. |
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22nd Oct 2019 3:05pm |
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Brian Considine Member Since: 15 Apr 2019 Location: Garlinge Posts: 428 |
I used to think that it was a bodge until I used some Barsleaks in a Transit to get me home once - it stopped the leak after a few miles & was still holding some 100,000 miles later..............
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22nd Oct 2019 3:07pm |
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