I have no history for a cambelt change with the Rover, as previously mentioned, and it has done many, many miles. I therefore determined that while I had the pennies to do it I really ought to and Mike and I set to this weekend to do just that. I'd ordered a Gates timing belt and tensioner on the recommendation of a friend that rebuilds K Series engines, a Draper cam locking tool, a waterpump and a thermostat (neither of which I can remember the brand of) and aforementioned friend sent me two replacement inlet manifold gaskets. I've never done this job before so I was entrusting most of it to Mike as he has, on the MG TF no less so this should be much easier to do given that access is better on the 400.
First job was dropping the coolant out, something that I'm getting to be a dab hand at given how many times I've done this to flush the system. Easiest location I've found is the bottom hose where it joins the rail under the radiator.
Then the expansion bottle needs removing and the power steering reservoir moving out of the way but not removing from the car (I want to change the fluid at some point, I just don't have any in stock). The hoses that attach to the reservoir are gungy and have been since I got the car, the back of the power steering pump is also gungy. I don't know if this is down to a leak or something historic that's since been fixed so this was mostly cleaned up to see what new appears.
Next was to remove the cam cover to see what we'd got. No obvious markings on the belt in this position which we would later learn is a Gates belt, so it's had a timing belt at least once in its life which is something.
The car was jacked up, the driver's side front wheel removed, the partial undertray partially unfastened from the car and then the auxilliary belts were removed. The power steering belt looked fairly new with minimal wear.
The alternator belt, however, was in very poor condition. I will be replacing this when I next get paid.
With the lower cambelt cover removed you can see and get access to the crank pulley. It's not too messy under here, there's some oil on the sump but it's unclear if it's coming from a historic leak further up or is the sump seal itself.
Before removing the old belt by cutting through it, the camshafts were correctly positioned and the locking tool applied.
New and old cambelts, the new one is the darker one. The belt didn't have any obvious damage other than the teeth being worn compared to the new one so it likely still had some life in it. I really wish I knew when it was done so I could have said whether or not it was due.
Inlet manifold next which had started leaking again. The reason for it leaking was quite simply that the gasket that was bought new from Rimmers last year had shrunk and was no longer sealing properly. This would explain a few minor issues the car was having that I could never really pinpoint.
A new one was fitted which is much more snug.
Before that could go back on the car there were some other items to attend to. We got the old tensioner off and found it had some surface rust and made a shushing noise on rotation very similar to the one I kept hearing when driving the car and could never pinpoint.
The old waterpump seemed in good fettle. We fitted the new one because I'd bought it and it seems to be common practice to fit a new pump when you do the cambelt.
The thermostat was also changed. This looks to be the original thermostat for the car and has no jiggle pin like the new one. Also, the seal on it was deformed (and I have suspected a leak from this area for a while), one side was covered in K-Seal glitter and one side was just a bit gungy. It's good to know this is now replaced really.
As we carried on with the job it was getting darker and later and eventually colder.
