All posts by Jed

The 4AGE Midget update

It has been just over 2 months since the last update and things are moving forwards. After I’d posted the manifold pictures I made a list of jobs to do before I could fire up the car.  Looking back now I realise that I’ve done quite a bit so here’s what has happened.

The engine bay wiring was completed and the fuse and relay boxes wired up. Temporary wiring for the fuel pump and ignition switch was installed. The wiring for the alternator and starter was revisited to move it out of the way and protect it from the heat of the manifold.

MidgetFusebox

 

The fuel lines were all fully secured and all clamps tightened and a sleeve knocked up for the fuel rail for blanking off one of the extra banjo connectors. After a bit of messing around caused by me wiring the ECU to the wrong side of the fuel pump relay, I had a working fuel pump.  The engine and gearbox oils were added and with a temporary 2″ straight pipe to the rear it was time to try firing up the engine.  A bit of tweaking to the fuel map and ignition was required but after about 15 minutes of tweaking it fired up for 10 seconds. October 23rd 2013 was a major milestone in this project. With no coolant in the system it was left at that short run but at least it worked.

The exhaust system was fabricated from straight 2″ pipe plus an over axle bend. This needed lengthening on each of the up and down sections to match the bodywork and the mounts were made using 3 classic Mini mounts.  A couple of mild steel silencer boxes and a few more bends and the system was completed. To give it the new car look it was sprayed with silver BBQ paint. Time will tell if this lasts.

exhaust-overaxle

Last week I started the wiring to the rear of the car and today that was all pretty much finished bar a few cable clips that need fitting. All the rear lights work but I might replace the bumper mounted number plate lights with LED number plate bolts instead. The only reason being that it will be easier to seal the bolts that it will the cable to the bumper mounted lights.  Cloth tape was used because it looks more authentic and seems to hold together over time better than PVC tape.

The prop shaft arrived from Bailey & Morris today (very impressed with their service) and was eventually fitted. Trying to get the prop into position while working on the car on axle stands and with the axle and fuel tank fitted a challenge.

Midget 4AGE Manifold

So last time I signed off saying that I’d be doing more cabling to get the thing running.  Instead I replaced the steering rack gaiters because the ones I’d picked up from a parts supplier on ebay didn’t actually clear the rack fully. That’s another tenner wasted but at least the ones from MEV Spares (jumblemaster) are the correct size.  If I had more spare time I’d visit MG Mecca a bit more for spared as they’re only 20 miles away but unfortunately I have to work.

The heater took some time to sort out. The original heater is the early style square box but the snail fan was on the wrong side for me due to the throttle bodies being in the way. The solution was to turn it round and then weld up the holes in one panel and drill new ones in for the matrix in the other. Rather than use the snail fan assembly I knocked up a slim housing that I welded onto the heater box. The fan blade needed sliding onto the shaft a bit more and the fan motor mounted on some spacers to locate the fan in the narrow housing. I then was able to fit an input pipe from a 1500cc car and the end result looks good.

modified-heater

The last week’s work has been spent knocking up an exhaust manifold from a few steel bends and a laser cut manifold flange.  Total cost is just under £80 for the manifold which while it isn’t perfect it will do. It is made from mild steel but I had a 20 year old TVR that still had it’s original manifold so I’m hopeful this will last at least as long.

exhaust-manifold1

Other highlights of the last month or so include fitting the windscreen (can’t believe that I don’t have a photo) so that I stop placing tools on top on the body.

Summer 2013 update

Three months on from the last update and there is progress.  A few quids worth of silicon hoses arrived from various suppliers mid July that should be sufficient for creating a bolt together solution.

hoses

 

One thing missing was some hose joiners and this is where my DIY mentality came in. You can get 32mm alloy diameter aerial masts quite cheaply and these make great hose joiners but they need a bead. Bead formers run to several hundred pounds so seeing as I have a lathe I knocked one up using bits of steel lying in the shed.  The end result is a bead former that is adequate for occasional use. The roller is turned using a  socket wrench and a spanner is used to apply the pressure in stages.  It takes between 4 and 6 revolutions to get a nice bead and works fine for the limited use I’ll put it to.

bead-former

And here is the first bead I made – before painting the bead former for the sharp eyed ones out there.

first-bead

The hoses could now be cut and joined up to proved a cooling system and were loosely fitted into place.

Next up was the fuel system and the fuel tank was bolted into place. This did require the boot floor to be “raised” with the aid of a hammer above the sender to clear the connector but it went in ok. The 8mm and 6mm hard fuel lines took several evenings of work to shape and fix in place and then another evening later the fuel pump and fuel filter was bolted to the rear bulkhead.

Turning attention to the front end it was time to start final assembly of the engine area. A quick stop at Screwfix for some hose clips and I picked up 10 in each size I was likely to use. These weren’t their cheap range so I expected them to be good but they snapped before they were reasonably tight. The Terry clips I’d used before worked fine so a quick online order and I had 60 Terry clips and they worked out the same cost per clip as the Screwfix ones.  I really must stop buying own branded junk and stick with the known brand names.

So today the hoses were fitted followed by the final fitting of the inlet manifold and throttle bodies. The fuel injectors had new seals fitted and it all just bolted together nicely.

tbs-fitted

 

Next up is the remote oil filter then some more cabling to get things started.

Painted

So.. during the last few months I’ve slowly been building up the engine bay. After much measuring and checking of radiator dimensions I’ve plumped for a dinky unit from a Suzuki Swift. It is mounted on a custom frame and is angled backwards to ensure that it clears the bonnet. It isn’t the thickest radiator so I’m going to ensure that an oil cooler is hooked up using the original take off points that are on the 4AGE engine when mounted in a MR2.

Next up was the inlet manifold,and this was bolted to the head. I acquired a set of 4AGE 20V throttle bodies and set about separating them from their inlet manifold and loosely bolted them to the manifold. As I didn’t have a connector for the Toyota throttle pot I took the harder route and knocked up a fixing plate and a threaded adapter to fit the D shaped throttle pot from a Ford/Rover.

tb-fitted

I was about to start making the engine loom and discovered that the injectors had an unusual connector. I soon gave up looking for suitable connectors and instead dug out a fuel rail that had some Denso injectors that took mini power timer connectors. Spending a few minutes a night in the shed resulted a week later in a loom for the engine bay. The ECU is an old DTA E48 chose mainly because it was cheap.

Having assembled this much it was time to pull everything out of the engine bay and get ready for a bit of painting. A lot of the junk from the shed was relocated into the garden shed and painting begun. A 2K etch primer was applied to the bare metal and this was followed a few days later with a high build primer then a few coats of an Old English white sort of colour. This is the colour that looks like Tesco Value Custard under fluorescent lighting but thankfully looks better in daylight.

painted-body

So this is where I was at come the end of June. At this point I then suffered a bad back and then had a weeks holiday in Cornwall so progress stopped.

Feb 2013

After fitting the suspension the brakes were the next job. Last time I made some brake lines i was with copper pipe but this time I decided to use cunifer pipe. This was when I found out how bad the basic Laser brake flaring tool was. Fortunately I managed to lose the forming “top hat” so had to rummage through the tool box and found the old Motaproducts tool donated by my father-in-law a few years ago. It turned out to be a cracking tool and made lovely flares.  I later discovered that the line down the transmission tunnel needs to be a bit higher at the front so that the gearbox doesn’t touch it when being fitted.

midget-brake-lines

 

Once the brake lines were fitted the engine and gearbox could go back in. Once installed the next task on the virtual list was to fabricate a bracket for the alternator. It was made from 5mm plate and shared the 2 front mounting holes with the engine mount. Alignment was done with the Mk 1 Eyeball but after assembly it looks like that this needs recalibrating. That plus a bit of play in the alternator mounting hole resulted in 4.5mm misalignment. The alternator mounting hole was drilled out to 12mm and lined with some 12mm OD alloy 1mm thick tube that was a nice fit to the 10mm bolt.  A bit of a tweak on the bracket mounting  holes resulted in a near perfect alignment.  The tension arm came from the pot of odds that one accumulates and will be shortened at some point.

alternator-fitted

The steering rack and column were fitted to check space etc. Next up is the cooling and fuel injection.

Winter months

The cold weather put a stop to finishing the spraying so early December I had to find something else to work on. The back axle & spring assembly had been stored under cover beside the shed so this was moved into the dry for some attention.

I will be so glad when all the cleaning of greasy and rusty parts is over and the axle was a mess. Here’s the axle before I started.

axle

The spring mounting pads were seized.

rusty-spring-mount

The axle was completely stripped down. The front metalastic bushes were drilled out and everything was cleaned with a wire wheel and rust treated then coated with some chassis black.

The diff was rough to turn so was stripped and needed a new pinion oil seal and the pinion front bearing was worn. At this point the list of parts required was growing.

Attention turned to the front suspension and more stripping, removing of grease and rust was undertaken.  The kingpins were removed and it then became apparent that the lower bearing surface was corroded and the kingpins were a loose fit into the stub axle.

rusty-kingpins

Attempting to remove the kingpins from the wishbones revealed the next issue. The fulcrum pins were seized to the kingpins and the trunion had a lot of play in the threads. Cue more expense, this time for a set of wishbones. However rather than pay £60 each for standard pattern parts I took what I hope is the better route and purchased a pair of Barry KIng premium wishbones – see http://www.spridgetwishbone.co.uk for more details.

2013-wishbones

Among the pile of spares I’d been acquiring was a pair of new king pins and fitting. The new king pins were tried in the uprights had the lower bushes were shot. The old ones were drifted out and new ones drifted in and then reamed using a reamer I’d purchased over a year ago. It would have been as cheap to buy refurbished ones but I wanted the challenge and I’m rather enjoying all this.

As you work though these tasks you find that more parts are worn or broken so more parts have been ordered. Even things like 3/8″ UNF bolts had to be ordered because I didn’t realise I’d need so many. I was thinking of replacing UNF bolts with metric ones but the number of captive nuts and studs would have cause confusion so I’m sticking with the UNF bolts where originally fitted and will use the metric ones on the engine.

As of January 24th the axle, diff and spring assembly has been bolted to the chassis. The handbrake linkages were worn so the holes were welded up and then re-drilled and all painted etc to look good.

2013-axle

With the axle fitted attention was turned back to the front and it was assembled and included poly bushes as well. The original dampers have been retained for now but will probably be modified once the car is on the road. I want to experience the improvements with each change rather than just throw them all on now plus if I did that I’d never finish it.

2013-suspension

This is the nearside fitted and just the offside to go. I’ve also been working on the pedal box and made up some 1/4″ spacers to space the clutch and brake cylinders away from the housing. The effect of this is to move the pedals just over an inch towards the bulkhead. Apparently there is still enough pedal travel if you do this…..time will tell if this is the case but being close on 6’2″ I need as much space as possible.
Edit: April 2013.  Spacing the master cylinders to move the pedals resulted in insufficient pedal travel so the spacers were removed.

2013-suspension-fitted

Here’s the suspension bolted in and the pedal box was about to be assembled and fitted.
Next step will be to plumb in the brake lines then drop in the engine.