Jh roadsport

After tightening the loose bolt the car is so much quieter particularly when coming off the throttle. It was obviously causing vibration through the chassis. Something to keep an eye on

Hi guys I had a look under the car and it looks as if one of the diff mounting bolts is working loose. Not much but the little paint marker don’t  line up so I’m assuming it’s working loose. Anyone know the tool size and torque number? Thanks 

£63 for a dipstick hhmmm. It would be nice not to have to take off the nosecone off each time. 

Hi thanks guys for the info/advice. Yes the car is within warranty so I will get it booked in hopefully they can get it done ASAP. 

Thanks for the replies. On checking under the bonnet this morning there was some leaked fluid from the cap. So checked the level virtually full. Just a small amount leaked. Cleaned it up and on tightening the cap it didn’t really tighten just went loose again so put a couple of layers of tape around it then refitted the cap and it created a better seal. Was fine for the trackday but on the journey home it went limp again so I’m going to have another go at getting a tight seal on the cap. Hoping that’s all it is. What is it with Caterham using crappy fluid caps that don’t work?? 

Hi guys, I have a newish 420R. On my way down to Silverstone tonight for tomorrows club trackday I go to push the clutch pedal and it’s halfway down before I touch it. A few pumps it comes back but not for long. I’ve had this issue last year then a mechanic at bookatrack bled the clutch fluid and it seemed better now it’s happened again. I’m at Silverstone tomorrow so it’s short notice to get it sorted. I’ll check the fluid level in the morning though last time it happened the level was full. Anyone else have this issue?

thanks in advance 

Jason

Car is on 15” wheels with Avon zzs.

I’ve booked it in at BookaTrack on March 27th for corner weighting. So I can enjoy the afternoon watching the BTCC cars on track at donnington  as it’s their official season launch and pre season test during the afternoon. It was great last year and free. 

Having just measured the car to ground. Front of rear wing ground to chassis and rear of front wing ground to chassis is 165mm on all four corners so no rake at all?

The  dampers are bilstein and the springs are eibach. The dampers have adjustable double collars and there is around 30 mm of thread bellow the lowest collar.

Tazio, I’m aware there are many companies that can set up my car. I chose BookaTrack because it’s most convenient for me and I have got to know some of the guys there over the last couple of years. They have a large fleet of track Caterhams and look after customer race cars and trackday cars so I,m confident they know their stuff.

Hi I’m near Matlock, Derbyshire. So I think I’ll get in touch with BookaTrack and have a discussion with them.

I will also check the rake. Interested to see what the factory set it to.

Thanks Jonathon I will try to get some photos during the week.

Hi Jonathon, it was the BookaTrack photographer who pointed out it was higher than normal at the front when at Donnington. Having looked at the pics it’s clear it’s higher than others at the front. It has a dry sump so where is the correct place front and rear to measure for rake? Also it has a double collar I seem to think eibach springs. Standard 420R suspension not the race ones. I don’t have the car with me to get pics at the moment then I probably wouldn’t know how to upload them. J

Hi guys, I’ve noticed from trackday pics the front looks a bit high. I have a factory built 420R and everything is as it was from factory. I know I should get it set up properly. In the mean time I’d like to drop the front a bit for track days then raise it back for clearance on the road. Oh and correct tool for the collars? Any advice appreciated.

Jason

Thanks Mark I've ordered a pack of ten. I'll put a dab of loctite on the thread.

Thanks I had a good look around it the other day as I was doing an oil/ filter change. Nothing untoward though only on 850 miles so early days.

Thanks, though I've found it in caterham parts. It's comes under button head screw- csr coil cover m6-16mm which is a pack of 5 even though there's only two to fix the cover. Maybe the spares are for when they do the disappearing act. 

hi guys I noticed one of the two engine cover fixings is missing. Anyone know the correct part so I can order one? Thanks

Hi Jonathan

The service schedules are in the owners handbook that came with the car. It states Duratec 175/180/210 engine variants so not 420R specifically. 

Hi I've finally collected my factory built 420R. Had a great drive home on Saturday.

Im assuming the oil is 5W/50 fully synthetic and not a running in oil? As the 1st oil/filter change is scheduled at 12 months or 6000 miles according to the owners handbook. I would of expected the 1st oil change to be 500 or maybe 1000 miles.

Ive read a couple of self build 420R blogs where it's been stated they have a running in oil. Is this correct?

So just wondering is the general consensus to just do an early oil change for peace of mind.

Jason

Do you mean the black on the screen frame or the glass itself?

Yes they perish over time but I'm getting a new 420R mid summer so it should be ok short term. The original item is ten years old.

Thanks guys.

Id imagine there are cheaper options than the caterham part but surely it's the best option. I'll get one ordered

Jason

Hi does anyone know the size (diameter) of the hose between the filler and the fuel tank? Mine is perished and got cracks in it. I noticed fuel dripping on the floor whilst filling up.

Thanks in advance

Jason

Hi I spoke with a technician at caterham dartford and they said they have not heard of this issue. Not from customers or the caterham dealers. I explained I have a build slot soon and that was my concern that I don't want to suffer these issues. They said there's no issue and nothing to worry about.. 

Anyone tried to remove with an impact wrench? My car gets built in May so I will be in touch with caterham to see if they have rectified this issue.