It's a pity these hoses were such a weak point. They lead to many cars suffering hgf needlessly, especially when owners didn't keep an eye on the coolant levels.
Coolant loss by any means leading to overheating is the prime cause of Cylinder Head Gasket damage and even Engine damage ... in most cars.
These hoses are all over ten-twelve years old now. Some more. Old age doesn't help here. Not me but, I'm talking the effects of many cold engine starts, hot engine runs and switch off heat cold cycles. Maybe thousands of times as the miles and years go by. This can and does accelerate deterioration and fatigues the rubber material in coolant hoses subjected to all those cold-hot-cold cycles.
However, unlike most of the other hoses used on these 1.8t cars and other Rovers, based on three Top Hoses which exploded dumping all the coolant in my own experience, looking at where the rubber fatigue fractured I believe there was a manufacturing weakness which lets go after many miles and years. It would almost certainly not show up in routine manufacturer testing programmes prior to production which do include wear and tear fatigue cycles but not problems with ageing involving many years and use cycles.
The weakness in the three hoses I have had let go are all along a seam in the hose's moulding during manufacture process. Here's a close up of the latest one which let go two days ago along that seam:~
Clearly the tear follows that manufactured seam. Just as the previous one did along that same seam in a different place nearer the cylinder head end. :~
Anyway, the car is now up and running fine again which is a bonus. Actually with more than one bonus as a result of this fractured hose incident. Tell you why.
Then fitting the good used replacement Top Hose and topping up the cooling system, after bleeding it from that 8mm Bleed Bolt above the Bell Housing. Old removed and replacement fitted :~
Then I poured all the SPEEDFlush into the cooling system. Only water used although no doubt some old Antifreeze still lurking in the system. I did not drain it completely. So this stuff is in and I took it for a drive having bleed the system and engine nice and warm.
Now I have mentioned how disappointed I am with the heater output of my ZT-T 1.8Ts. Compared to the other 1.8 K-Series ( MG ZS ) in the family and the T-Series Turbos. Luke warm only in comparison with all turned up to eleven! ..
I had only driven two miles today when I was surprised at the sudden increase of heat output from the heater. Far warmer than at any time in the previous seven months of daily driving. Few miles later, more improvement in heater output. Good. Obviously the SPEEDFlush is doing its stuff and possibly has shifted any crud or snake oil type Head Gasket Liquid Repair stuff lurking in the Heater Matrix and elsewhere in the cooling system. After all, I bought this car from a local dealership who took it in P/X with suspect so called HGF. Fifteen hundred miles later, no positive signs of that. This is not the first time SPEEDFlush has worked its stuff on my project cars. Please note and be warned.
I do NOT follow the SPEEDFlush manufacturer's instructions "on the tin", which advises only fast idle for a period. What I do is take the car for a drive and 20-30 miles later, drain and hose out the system thoroughly with an ordinary garden hose then fill with 50-50 Anti-Freeze mix.
This has worked for me several times in the past but, I am not recommending the process only that it works for me.
Soooo ... I now have a ZT-T with heater output more like my old bones appreciate in these wintery lower temperatures.
There was another bonus as I worked in the superb late winter sunshine. A very active Red Admiral Butterfly flying about in the micro-climate which is my south facing garden catching all the sun for hours even in midwinter. Got a couple of pictures too. One on my shed and another as it sunbathed on my patio.
In very good condition considering it must be several months old plus at least two months in hibernation. I did see one briefly in the garden in mid-January on a rare sunny day. Maybe this one. Who knows.
There's more. Yet another bonus to complete this fine day. 'bout time I had a change of luck for the better. Whilst working on the cars in the fine sunshine, I had the radio on with Radio5Live football coverage. Could not believe those scores coming in but, they were real. Good day all round as I won a few quid on both singles and combination Premiership football bets. Thanks and well done West Ham, Sunderland and Chelsea. Had Stoke won my Yankee would be complete. Can't win 'em all... But. I'll keep trying ....
Oh yes, yet more. Later in the dark, I used a new Gizmo which I bought yesterday having seen a larger version used by the AA's rescue Guy in his brand new van. A Work Light. This one :~
Just the job. That on half power. Here it is in action :~