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Old 1st November 2018, 17:24   #11
v-man
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Originally Posted by FLYING BANANA View Post
Well, 5 gaskets later. 4 actually did fail, the 5th was changed as a precautionary measure after the radiator let go.
I check the oil and water every time I take the Yellow one out. And she has still made it to 202,300 miles. And I would buy another tomorrow.

Is there another one for sale then Bob
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Old 1st November 2018, 18:02   #12
FLYING BANANA
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Is there another one for sale then Bob
Not in Sunspot Yellow alas. The only ZTT is a 180.
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Old 1st November 2018, 18:26   #13
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Go buy a 1.8, they are damn good engines, and if the head gasket goes, fix it! They are the easiest engine out of the whole range to work on, and the best drive too.
I have had 2 k series mg's.
My current zt and an 1800 120bhp zr with tf cams.
Had to replace the chg on my zt when I got it and flushed the oat antifreeze out to replace with blue.
Not used a drop of coolant in over 12 months and runs so well.
If you look after and properly maintain the k series they will be fine
Would have a k anyday.
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Old 1st November 2018, 19:36   #14
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I read somewhere that the later K series fitted to later 75s had several modifications to overcome some of the design features of the original K which made it more susceptible to HGF through uneven heat transfer/stress. My My'96 MGF VVC suffered HGF. We knew of its reputation before buying, but thought careful warming up and good maintenance would save us. Dunno if it was the original, but it went 2miles after leaving work - wife saw the gauge go up, coasted to a stop and switched off, but the damage was done. Fs were the worst for it, due to the layout of the cooling system - large volume of water outside the engine block, which has a small coolant capacity. When the thermostat opened, large amounts of cold coolant flowed through the engine, causing massive cooling stresses. Dunno if the TF's system was improved, I know some owners did a mod to slow this flow, or reduce the speed of temperature change. The Landrover-designed replacement gasket also proved more reliable than the original. The OAT pink, long life coolant as recommended by MGR, also proved to corrode gaskets over the long term. So with a late 1.8, with a fresh gasket, and never had OAT, you should be onto a pretty safe bet. Unless you are just unlucky!
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Old 1st November 2018, 20:35   #15
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With cambelts needing changing regularly, it's not a much bigger job to whip the head off and fit a new gasket whilst you are at it. Just make sure that the liner heights are inspected and the correct gasket for their condition is used. The new and improved elastomer gaskets are proving to be better than the originals. The multi layer steel are also good if needed and if suitable for the liner heights. It's not just K series that seem to blow gaskets. There are plenty of other makes that fail too! Always wise to fit new water pump, tensioner and thermostat at the same time.
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Old 1st November 2018, 20:45   #16
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[QUOTE The OAT pink, long life coolant as recommended by MGR, also proved to corrode gaskets over the long term. So with a late 1.8, with a fresh gasket, and never had OAT, you should be onto a pretty safe bet. Unless you are just unlucky![/QUOTE]

If you don't use OAT, what do you use?
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Old 1st November 2018, 20:53   #17
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Originally Posted by charlie 22 View Post
[QUOTE The OAT pink, long life coolant as recommended by MGR, also proved to corrode gaskets over the long term. So with a late 1.8, with a fresh gasket, and never had OAT, you should be onto a pretty safe bet. Unless you are just unlucky!
If you don't use OAT, what do you use?[/QUOTE]

OAT is the spawn of satan!

Good old fashioned blue is the way Yes, it doesn't last as long between changes, but it doesn't eat stuff!
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Old 1st November 2018, 21:05   #18
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If you don't use OAT, what do you use?
OAT is the spawn of satan!

Good old fashioned blue is the way Yes, it doesn't last as long between changes, but it doesn't eat stuff![/QUOTE]

I change my coolant every other year. I take it to a Rover specialist who use OAT. So I should tell them to do it every year but using the blue stuff.
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Old 1st November 2018, 21:24   #19
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Originally Posted by charlie 22 View Post
OAT is the spawn of satan!

Good old fashioned blue is the way Yes, it doesn't last as long between changes, but it doesn't eat stuff!
I change my coolant every other year. I take it to a Rover specialist who use OAT. So I should tell them to do it every year but using the blue stuff.[/QUOTE]

Make sure you flush it with an additive before changing to blue, they don't like to be mixed.
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Old 1st November 2018, 21:49   #20
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Quote:
Originally Posted by charlie 22 View Post
[QUOTE The OAT pink, long life coolant as recommended by MGR, also proved to corrode gaskets over the long term. So with a late 1.8, with a fresh gasket, and never had OAT, you should be onto a pretty safe bet. Unless you are just unlucky!
If you don't use OAT, what do you use?[/QUOTE]
I use PRESTONE universal, made by Holts. My CDT had OAT in it when I bought it, so I thought safest this time to use a universal - no chance of contaminant gelling. I use green silicate based Comma Xtreme G48 in my Mitsubishi - it has always had it, and never had the head problems so many similar grey imports suffer. As John says, head gaskets aren't usually the cause of a problem, they go because of some other fault which causes overheating. However some engines are more susceptible to HGF when overheated than others, - my Mitsubishi apparently being one. It has similar narrow waterways to the K, so if they fur up, or you lose coolant, they quickly overheat. On my MGF, I never found out whether the burst hose which lost most of the coolant was cause or effect. It certainly didn't look to be in poor condition, other than the massive hole in it where system pressure had exploded it, so I guess it wasn't the cause of the gasket going. It used very little coolant up to that day, I checked it every week (about 150miles)
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