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24th January 2020, 13:30 | #1 |
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What's My Problem? Please advise
1.8T 109K miles , owned the car for over 10years. I think I know what I need to do, please confirm!
Negatives: Coolant loss about 1/2 litre every 50 miles A lot of steam from exhaust Some mayo at the oil filler cap and in breather pipe to inlet manifold Positives: Engine runs fine, much as it always did All four spark plugs look the same and ok. Can't see any water in the cylinders or blown out of plug holes when engine turned over(cold) IMG replaced about 1000miles ago and this week taper washers fitted to top manifold studs (as recommended here). No external coolant leakage No overheating No sign of oil or smell of exhaust in expansion tank. Thanks in advance for advice ( please don't say scrap it!) Last edited by billh; 24th January 2020 at 13:38.. |
24th January 2020, 14:16 | #2 |
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steam from exhaust will happen when exhaust is cold and in cold weather, mayo in the filler cap could be that the car is not being used enough each journey and you have condensation in the oil. A log run where the engine gets hot would clear this but
it could also be water in the oil and with you losing 1/2 litre of coolant every 50 miles I would be concerned about water getting into the oil and the dreaded HGF comes to mind. good luck macafee2 |
24th January 2020, 14:27 | #3 |
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That amount of water I'd say HGF, sadly as we all know the K series engine is very prone for it.
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24th January 2020, 15:22 | #4 |
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Get expert advice. See if one of the traders on here live close by, they might be able to help.
My 1.8t is on 208,700 miles.
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24th January 2020, 15:24 | #5 |
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simple test - take her for a good 10 mile thrash at motorway speed - leave her overnight - open the expansion tank and if you get a very audible escape of gas it points to exhaust gas in the coolant system and points to HGF - also smell the coolant in the tank - can you smell exhaust gases.
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24th January 2020, 15:29 | #6 |
I really should get out more.......
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Also this test as per T-Cut
"Try a fast pressurisation test. With the engine stone cold, open the header and check/adjust the coolant level to the correct level . Replace cap. Start the engine and with your foot on the throttle, raise the turnover to around 3000rpm. Keep this going for around 30 seconds. Turn engine off. It will still be relatively cool, so remove the pressure cap and see if there's any pressure buildup. If coolant surges into the filler neck or actually overflows, you can be pretty sure the gasket's failed"
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She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide. |
24th January 2020, 16:45 | #7 | |
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Quote:
Where to go from here? I'm concerned that continued use and constant coolant topping up may contaminate the oil and damage the turbo. The oil level isn't rising noticeably on the dip stick. Last edited by billh; 24th January 2020 at 16:52.. Reason: added "coolant" last para. |
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24th January 2020, 17:18 | #8 |
I really should get out more.......
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Suggest you do the test in my earlier post - a motorway thrash - if that does not generate any audible sound of exhaust gas escaping it points to your gasket being OK.
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24th January 2020, 20:17 | #9 |
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Failing all that then make a careful check on all the cooling system hose clips. Anti-freeze leaves traces as it evaporates.
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25th January 2020, 10:42 | #10 |
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My 1.8T recently dumped the coolant into the sump. It wasn't overheated or stressed, it simply happened. Prior to that, I'd been topping it up with a cupful of coolant every couple of weeks. I knew something was wrong, but it happened before I'd a chance to work on it.
The problem was the OEM elastomer head gasket. The 'rubber' seals around the oil channels had simply delaminated from the metal. The fire rings were perfect. With this sort of failure, you don't get pressurisation in the cooling system. It's very insidious because there are few outward signs. Mayo under the oil filler cap is one as is steam being emitted from the open oil filler neck when the hot engine's running. Cold weather is best for this test. I replaced the gasket with the latest elastomer type from DMGRS. TC Last edited by T-Cut; 25th January 2020 at 10:51.. Reason: Replaced with smaller image. |
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