R53 has felt slow for a long time, a few weeks back i thought it would be fun to do some checks to race it against my Corsa 1.2 16V. Funnily enough whoever was driving the Mini just could not get away.
Ok so very down on power.
2 weeks ago we drove from Scotland down to Reading, after about 250 miles of our journey the cars performance came back and it was great and felt very strong
Then after a few miles doing short distance driving the car got very slow again!
This happened a few times whilst we were driving around and felt great after a really long run. I don't get it.
What we did notice in all this time is that we were going through alot of coolant and after each of the long journeys we had lost half of the coolant from the expansion bottle.
The other day after driving 30 miles and stopping in a car park we could hear alot of bubbling noises?
After checking this out we found there to be no coolant and the expansion bottle had split on the seam.
I then did a compression test over the weekend and found cylinder 1 to be very down on compression, the other 3 were exactly the same. This was done with all plugs out with a hot engine and WOT.
The test was repeated after putting a bit of oil on the cylinders, this made a very small difference equally accross all the cylinders, but cylinder 1 was really down still. apologies but i measured 11-11.5 bar on 3 of the cylinders dry and 11.5-12bar when oil was added.
Cylinder 1 measured 8-8.5bar dry and 8.5-9bar when oil put in cylinder.
I did this a few times, because i was in a bit of denial, but the numbers speak for themselves.
I suspect a headgasket issue, i am hoping it is not more serious. Is this a common problem?
With the help of the forum and many searches i am also going to check bypass valve etc for another possible reason why its down on power before we had coolant problems.
I am also going to check and replace the thermostat and housing as this could have been leaking coolant aswell. There was a slight leak at the front so i may also check the radiator joint.
Our gearchange is also slightly stiff so its a good excuse to do the mechanism bolt change thingy.
Our car is at 105k+miles. So i am going to give it a bloody good service and replace SC oil aswell. We are also toying with smaller pulley and few other little things as may as well do as one big job.
Can anyone give any advice on problems, maybe advice on things to look at and replace? Where to by parts from etc etc?
All help be much appreciated