Sunday, 2 March 2014

Engine Coolant system, Dials and more wiring!

So after the engine being started up before, it was time to put all the fluids in so that included the engine coolant and gearbox oil.

I already had the fan wired up and because the MR2 has two types of radiator temperature sensors (one for aircon cars and one for out) my fans were on constantly. First I ran it with the heaters off to try and circulate around the system but no such luck turned the heater system on and the air from that was cleared instantly and the heater was giving out warm air (IVA requirement is to be able to demist your windscreen). However I could not get the system to circulate...maybe an airlock, now I don't know if the temperature wasn't fully up to required temp to open the thermostat (82c) or it was broken...I had a spare so changed it and replaced the coolant.

Still was unable to tell, due to the exhaust being just a decat pipe its extremely loud so could not do this late at night and leave it constantly running, so I'm currently sourcing a temporary backbox to fix directly on so I can run it and its quiet! I however did have a small leak...which was quickly fixed!

On the Saturday my dials from america came, they are Dakota digital dial set for a ford mustang '70. I found out from Dakota before hand all dials used the same box its just the layout with the car sets is setup so they can be directly fitted. This means anything in their range could be chosen and fitted. I went for them for a few reasons one was the extremely easy setup from what id read of the PDf file on the internet.

And it was easy within 2 hours, id wired indicator lights, dim light, headlight, Tacho, Speedo, fuel sender, volt meter and coolant coolant sensor. I still have the oil sensor to go.

The coolant sensor required I used the one provided but with the adapters this fitted directly into the MR2 water inlet housing in replacement of the one the MR2 already had for the gauges. It was a little messy with coolant already in there!!

Everything can be setup on the dial system so easily. I haven't set the speedo yet although wired but what I like is it gives two custom methods to calibrate which are more accurate then any MPH / KMH conversion box (needed for an import MR2)

Most cars with ECU's nowadays give out a PPM (pulse per mile) which may be 8,000 for instance, however stick bigger wheels and tires on and this can make your speedo out. By calibrating with your bigger wheels and tyres on the car the Dials may register that its only 7850ppm. Bringing the accuracy back to your speed with the bigger wheels. The accuracy is important for the IVA tests.

You'll notice in the first photo of the dials a control box, this is where all wires go with a simple Cat cable to the dials...meaning less cables everywhere again! the control box fixed nicely above the fusebox and allowed me to tidy the wires easily as well.

The small fusebox to the top of the photo is the original MR2 power feed fusebox giving some additional protection in case of a serious pull of amps.

Following the tidying of the cables there, I now knew there were no more wires to be added down the length of the cabin that id done, or worst case 1 or 2 if id made a mistake it was time to strip out the load of unwanted cables and everything seemed to get tidier quiet quickly.

The above shows all the cable securing points via brackets screwed into the chassis and cable ties to secure them, maximum distance for the IVA is every 300mm.

In the photo below the 2 cables down on the left hand side will fit within the one conduit i just have not done so yet. The cuttings on the floor are for the seat mountings and the longer strips are where the runner clips will move along so by not having the deadening stops fowling.

Normally you get to see all the nice work afterwards and not the mayhem that is on going at the just behind the passenger cabin the work continues and the wires need sorting.

I'm away for a stag do this weekend and then work, so not sure how much will get done this week and next so could be a couple of weeks before the next update!

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