Not long before I reach the 200k mark. Fixed the intercooler pipe a while back by drilling in self tapping screws (the VW clip is pretty much useless!)

Fitted winter tyres this year (not that I needed them since its been so mild...Typical) and I have a spare set of alloys I got off ebay for £150 with two decent Avon tyres.

The brake callipers are starting to show some corrosion and are difficult to home with the VW tool so they might need replacing with reconditioned ones sometime. Had the drivers side upper ball joints replaced and its feeling sturdier to drive.
Not bio related! PD engines are unique in the way they inject the fuel, using individual unit injectors being pressurised by the overhead camshaft. Fine tollerances and high pressure eventually lead to wear of the lifts and cam lobes.

Car was running rough, OK on idle but felt like three cylinders at 50-60mph. Now the cam has been completely rebuilt, just got to stop the turbo blowing off the intercooler pipe...

Vacuum Aspirator - Methoxide Injector
Strong Vacuum - Lifts Liquids above 1.5m

Making biodiesel can be potentially dangerous, methanol is toxic and sodium or potassium methoxide is both toxic and corrosive.

Eliminate your risk of exposure to methoxide by installing a vacuum aspirator into your biodiesel reactor. The flow of liquid alone creates a one way vacuum, sucking methoxide (or any liquid) safetly into the reactor.

Additional advantages include

1) Rapid feedstock drying by leaving the inlet open, airating the wet         vegetable oil

2) Your pump does not have to tolerate corrosive methoxide, extending its lifespan.

3) Fire risk is reduced, safer environment for the biodiesel operator.

4) Postive pressure created in the reactor, optimising methanol recovery via a condenser.

These vacuum aspirators are made from PVDF (Polyvinylidene Fluoride) which is resistant to hydrocarbons and corrosive chemical attack. PVDF is an advanced thermoplastic, used in specialist applications and tolerates a temperature exceeding 150c.

Fitted with 3/4" NPS screw threads, ideal for connecting to 22mm pipe work. You can either source a NPS to 3/4" BSP adapter or do what I did in the video and scew into 3/4"BSP with PTFE tape to create a seal.


Water vacuum test

150 litres of oil at ~60c, liquid was lifted above 1.5m with a 40 litre TAM 105 pump
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Eductors are a cost effective way of boosting your pumps power (flow output). The Eductor forms a jet, additional liquid is drawn through the nozzle via the Venturi effect. Flow rates can be boosted to 5 x with this inexpensive nozzle. Visit the shop for more info

Video - The eductor should be placed 5"
The nice people at Oxford Catalysts have donated a centrifuge designed to clean waste oil and biodiesel! I'm looking forward to installing it this summer, the ultimate in fuel purification.

Powered by a high gear pump, the centrifuge is powered by the pressurised fuel itself, spinning the main rotor head at high velocity. Particles that weigh almost nothing become much heavier, separating from the fuel.
Looks like the Wintron working well, I'm still on 100% Bio even during the coldest nights. Snow caused havoc as usual, got stuck on the same hill again!! Deployed the secret weapon - Snow Socks - which promptly distintegrated themselves...

Friendly Range Rover towed me up the hill - Thanks to who ever that was travelling fro m Southampton to Milton Keynes

Well last year I got truly caught short! One cold February morning we set off on a journey and promptly broke down 5 miles from the house. Solidified fuel in the tank , well it was -15c....Followed by a humiliating tow from the AA

So this year I'm trying Wintron XC30, a cold flow improver instead of the usual Synergy. I'm going to lag the fuel tanks with insulation at some point. Will keep you posted.
Oxford Waste Cooking Oil now supplies a range of filters as well as heat exchangers, glassware and other consumables aimed at the biodiesel and waste vegetable
I fitted the sump drain valve the other day. You can either buy a specific valve off the internet for £30 or make one from parts. Should be easier for me to change the oil which I do every 6k or so.

Making Biodiesel can be a low impact activity - almost everything can be recycled. Plastic containers are washed and put in the plastic recycling. Metal containers are crushed and sold for scrap. Often, containers are re-used to collect and store oil. Cardboard outer packaging is collected by the kerbside recycling.

Excess methanol can be reclaimed via a condenser and re-used. As for the oil, any dregs are used to start my wood burner.