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5th February 2017, 12:40 | #1 |
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Rover 75 18T 03 plate smoking after head gasket change
Hi
I had my head gasket change 3 months ago and it has started smoking really bad. I took it back and he reports the piston rings must have gone due to the head being skimmed and it has more compression so it would be the next thing to go. I had the AA out and he suggested that it could be the valve seals, but my mechanic said no it looks like the piston rings. Is he just fobbing me off, cause it's still under guarantee. At first the smoke was on start up and went after 5 minutes, but now it just smokes continuously, less when it gets work but still really bad can you help. |
5th February 2017, 13:13 | #2 |
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The first thing to suffer after a head gasket failure allows coolant into the oil is the turbocharger. I suspect the turbo bearings may have failed and is allowing oil into the exhaust system. Rather than jump in with the very expensive piston rings theory (which is rather far fetched IMO), I'd remove the large bore inlet air hose on the turbo and see if there's any slop on the compressor shaft. If there's the slightest sideways movement you've found the cause of the smoke. Replacing a CHRA cartridge is relatively cheap and easy. A DIY job if you do your own servicing.
TC |
5th February 2017, 17:40 | #3 |
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checks
As T-Cut has said, your first port of call should be to check for play in the turbo impeller. This thread may help if you need to change the CHRA.
http://www.the75andztclub.co.uk/foru...d.php?t=221730 If the turbo is OK then see if you can borrow a compression tester. The compression figures should be similar for each cylinder. If one is low, put a little oil in when you check again. If the pressure has gone up significantly it indicates the rings are shot. If not, then the valves need attention. |
5th February 2017, 17:48 | #4 |
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Another vote for the turbo
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5th February 2017, 19:59 | #5 |
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Don't know about the turbo, but the mechanics theory about skimming causing the rings to fail is utter tosh - don't believe it for a minute.
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5th February 2017, 20:02 | #6 |
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It is almost certainly the turbocharger, change your garage to a one who can diagnose faults correctly.......piston rings? I'm willing to bet the smoke is mainly white, and smells like you are running your car on high sulphur coal
By the way clapped oil control rings on a K series, is something I have encountered once in over five hundred engine rebuilds Brian |
5th February 2017, 20:02 | #7 |
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5th February 2017, 20:39 | #8 |
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I had same smoke from my 1.8t and it was the turbo. I changed the core gave it an oil change and took it up and down the bypass several times and it was fine. You may end up cleaning out all the pipework and intercooler too if it's failed.
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5th February 2017, 20:47 | #9 | |
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Quote:
As well as has been said regarding the turbo,I would find your self another Mechanic
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5th February 2017, 20:53 | #10 |
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I'd also agree with turbo.
As said, absolute rubbish with regards to piston ring issue caused by skimming the head therefore raising compression! Change mechanic as suggested. |
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