Fitting an oil cooler to Project C1

In today’s video, I’m installing an oil cooler onto Project C1. This is a preparatory job for the eventual turbo conversion job because as everyone knows, turbos produce heat and heat breaks down engine oil.

I bought an oil filter sandwich plate from AliExpress and has an M20 x 1.5 and a ¾ - 16 UNF filter adapter in the box. It’s made from billet aluminium and has 2x AN-10 and 2x AN-4 outputs. The only problem I encountered installing this was my own stupidity by installing it upside down!

I’m using the AN-10 input & output to connect it to the oil cooler and I intend to use the AN-4 outputs to install an oil temperature/pressure gauge and the other as an oil supply to the turbo in the future. The oil cooler radiator was purchased from eBay and is a 9-row radiator with AN-10 input & outputs. I used an M6 riv nut and bolt to attach it to the crash bar structure. If I were to stop at the oil cooler installation, I’d have mounted it underneath the crash bar, but because I’ll need an intercooler for the forced induction air intake, I’ll need that space to mount the intercooler and turbo, so it had to go above the crash bar. This caused bumper fitment problems which I’d fixed off camera and after installation, but isn’t really a big deal because I’ll soon be replacing the front bumper with a face lift bumper, modified so that it is fit for turbo purposes.

I also bought some AN-10 brained hose and some straight & 90 degree AN-10 connectors. This was my first time in assembling AN hose, so I found it a little difficult at first. I used masking tape to wrap around the hose braid at the area that I needed to cut it and then used an angle grinder with a cutting disc installed to cut through the pipe as straight as I could. I then used some red rubber grease to lubricate the inside of the connector, so that it slips over the end of the hose and buts up against the locking collar. I then tightened the locking collar as tight as I dare (steel spanner vs aluminium fitting) and then installed them into the car. I have also kept these hoses together with 2x AN-10 hose clamps.

Installing an oil cooler has increased the oil system capacity by what I estimate to be somewhere in the region of 0.3-0.4 litres, which brings the total figure to approximately 4 litres. This isn’t a bad thing because there is more oil in the lubrication system of the engine, still uses the same size of oil filter and it is still within the capacity of a standard sized oil bottle form an auto parts shop, keeping oil changes cheap and easy.

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[gavjlewis]

Looking good so far. I do remember when looking at a C1 that was supercharged that they had put on a bigger filter from something like MR2 or a Celica, can't remember. This was because the stock oil filter became a pinch point and was restricting flow through the system. So might be something to look into before the turbo install.

[nickmeijer]

Another nice video. I’m excited for your new video as I’m having a mk1 Aygo with a rotrex supercharger installed running at 9psi.
My next install will be an oil pressure gauge and I think you should install one too, especially with the added oil cooler which now increases the chance of leaks on a bunch of extra places.
Anyway good stuff and hurry up with the turbo ;)

[Gourmondise]

Absolutely beautiful! For the wrong fitting - it happens to all of us mate. You admitted the mistake and fixed it. We all live and learn.
What boost you think can run on the original engine safely?

[ΦίλιπποςΣβουρώνος]

What is the reason for installing an oil cooler in the Citroen C1 1.0L when the Toyota Roomy 1KR-VET (1KR-FE turbo) 98hp does not have it?

[dillonlee]

what turbo are you going to use the boost your giong to use and the HP gain are you hoping for. im nearly ready to put a ct9 with 14 or upgrade to the 17psi waste gate for 180/215ish hp