I feel a bit like someone being mentored after rehab. Every day or two I get an email from Andre, along the lines of “you haven’t touched a drop, have you?“. Although instead they are more like “how’s the build progress“. And I must confess, I do find myself running out and doing something on the car, just to report back with some progress. Unfortunately progress on the car has resulted in neglect on the blog, so this may be a long one. I recommend just looking at the pictures.

The fuel tank has a very nice hole in it, to fit a fuel gauge. However, our’s is going to make use of the more technological “dowel dip stick” method, which doesn’t need that hole. So the hole was covered. Note the engraved “1” to help future lining up (because it wasn’t really machined to micron specifications). It will be sealed using some sort of petrol-proof sealing ring/paste.

I started feeling bad about the way the scuttle had been mounted. So I welded up the old bottom holes, and fitted riv-nuts to the top holes. So the scuttle is now mounted using riv-nuts. I think it’s a better solution, although sub-optimal to damage the chassis powder coating.

Then we took another shortcut, buying the windscreen from Wiekus. It’s beautifully done, far better than we could. Part of the package is the rubber seal along the bottom, which ensures a very neat fit with the scuttle. It is his own custom design, specifically with an angled groove for the base of the windscreen.

He also supplies a printed cutout sheet for the support arms, which I glued to a piece of 1.6mm alu to make temporary brackets to mount the windscreen.

Fitting the windscreen to the scuttle is fairly straightforward. First I wanted a straight line on the scuttle, so I clamped two pieces of wood to the chassis, rested the ruler on them, and drew a line on the masking-tape-coated scuttle. This was a useful reference to ensure the mounts were properly horizontal.

Then attach the rubber to the base of the windscreen and shift the whole thing around on the scuttle until there seems a reasonable fit and roughly even spacing on both sides.

Then comes the scary part – cutting the rubber. I tried a couple of knives; it needs to be sharp and have a thin, flat blade. The best ended up being a super-sharp serated Victorinox kitchen knife (don’t tell the missus).

I put a thin layer of oil on the blade, which prevented it from sticking. Because you want a nice smooth edge running down between the bracket and the scuttle, fading to nothing, you must extend the rubber a bit past the end of the windscreen. Simply cut in a straight line down. It might take a couple of practice goes to get it right, but Wiekus gives you a bit of extra length to make some mistakes first. Once you’re satisfied with your abilities you can cut the other end (no going back after that). I purposefully cut it slightly too long, to fill the gap with the bracket.

Although the fit is slightly imperfect, it should come right once the rubber is stuck down on the chassis.

The windscreen was on the critical path, because it needs to be in place to fabricate the roll cage, which is done at the same time as the exhaust, which is done before the wiring and the cooling brackets. Now the car can go in for its exhaust.

The final fuel lines have been put in, although the last couple of holes must still be drilled for the p-clips. This includes replacing one of the original lines, which clashed with the gearbox. The gearbox won. It always wins.

I put my new MIG welder to use, welding the engine mounts to the chassis plates. Fixing the engine position means you can move forward in several other areas.

Once the engine position is finalised, the prop shaft can be manufactured. Ours was done by SAJCO in Strijdom Park. Frankly, they were amazing. The only specification they needed was the length from the gearbox oil seal to the diff input flange. I took them our yoke, which they didn’t fit but was useful for spline sizing.  There are at least two input shaft sizes in the wild for the Ford Type 9/Type E box, so you need to get this right.

I also gave them an old Sierra prop shaft, which they took some parts from including the flange to connect to the diff, and some of the tubing.

The amazing part? I dropped the bits off at roughly 12h30. At 15h30 they phoned me to tell me it was ready. Very impressive.

Using a suggestion from Deon I made an adjustable alternator bracket.

Start with some accurate small pilot holes. In this case I wanted an 8mm groove, so the pilot holes were drilled 7mm apart:

Then drill a set of bigger holes – 7mm now:

As you can see, the holes start to run into each other:

After this, drill with the 8mm drill bit. Then file the points down to make a flat groove (it’s quite easy at this point):

Who needs a milling machine anyway.

It’s some progress – haven’t touched a drop (of not working on the car).

B

The wishbone therefore rotates on the poly-bush. This has two implications – firstly you can use bolts with fully threaded shanks, since the insert should not actually be rotating on the bolt. The thread of the bolt will therefore not damage the insert. The second thing is that the bushes need to be properly lubricated. This new set of wishbones gave us the opportunity to really pack in the red rubber grease. (Note – this does not apply to the shock-absorbers, which do rotate about the bolt). Many thanks to Chris for helping out with this sticky, icky job.

We got our engine mount brackets welded – big thanks to Ken of Zodiac Steel for assistance and doing such a good job. As soon as we had those sorted, we were able to properly see how the engine and gearbox would fit in. Needless to say, several adjustments to the bell-housing were needed, and we chopped some more bits off.

To fit the gearbox we needed to drill and fit the gearbox mounting plate. This is an H-shaped piece of steel plate, onto which the rubberised gearbox mount is, well, mounted. With the engine in place and the gearbox supported by a size-14 temporary mount, we could see if the mounting plate lined up with the mount points on the chassis. It was a wonderful moment when we realised that the fit is perfect. We marked and drilled the holes (8mm, although one was a slight miss, so it became a 9mm hole).

Feeling inspired by getting 3 out of 4 holes right, we marked and drilled the engine mount plates. We’d obviously improved our skilz, because we got 8 out of 8 of these right (no cheating here – 8mm holes for 8mm bolts, and they went in smoothly).

Checking the engine again, we realised that there was a risk that the starter would foul against the chassis. So it was another “engine out, attach part, engine in”. Only we realised a slight problem – the starter does not fit. There is a small sticky-outy bit on the sump that gets in the way. A couple of panicked phonecalls to Locost SA, and we confirmed that this needed to be chopped off.

It’s actually quite an easy job, but you don’t want to get all “power-tool” on it. The sump is aluminium, so if you get too aggressive you are likely to chop a hole in it. Another tool you’ll be needing for this job is a torque wrench that can handle 67N.m (thanks JR and Nick). The process is:

1) Remove clutch pressure plate (about 6-8 bolts, fairly easy).

2) Remove the clutch plate, to be left with the flywheel:

3) Remove the fly-wheel (6 bolts, fine thread), resulting in this:

4) Now you can get to the sump, and carefully cut the piece off. See pictures for confirmation.

You might need to remove two of the sump bolts, but we did not. You will not be able to use a normal hacksaw. A junior hacksaw got close enough that the last bit could be snapped off. Then a file neatened it up. One of those blade-only hacksaws will work, as will a dremel tool.

5) Clean off any loose shavings.

6) Put the flywheel back on.

Use a touch of lock-tite (removable) on each bolt, then torque to 67N.m. (Following all the right rules for tightening sequence. I tightened, bit by bit, a triangle of bolts, then chose the next triangle as starting from the opposite bolt that I ended on. Clear as mud?)

Leave the clutch and pressure plate off for now – they’re not needed for a while.

7) The starter motor now fits very nicely:

After this the engine went back in – we’re really getting our money’s worth out of that engine crane. The starter is a tight fit against the chassis, but it does fit. We then tested the bonnet for clearance – the dip stick handle will need to be “lightened”, but the 710 cap is fine (thanks to the bonnet scoop).

While we were fitting heavy things, we decided to balance it all out and fit the diff. It didn’t fit, which is a painful thing to find out while trying to hold that stupidly heavy piece of metal in place. The grinder was called to service again, but not quite vigorously enough. We actually think we might leave it as it is, since with a couple of spacer washers it fits fine.

EDIT 2011-02-25: It’s actually recommended by Locost SA that you rather grind away the webbing on the diff, than the diff mounting bracket. The theory is that the diff is more over-designed than the chassis mount point. We’re holding thumbs that it all stays together.

With the diff in place, it was possible to see how the gearbox and diff lined up. Badly, it turned out. The gearbox was shooting mortars clear over the head of the diff. Undismayed we put some longer bolts in the gearbox mount plate, and dropped it by about a centimeter. This lined it up perfectly, so we’re almost ready to order the prop shaft.

A small miracle happened during the week. We’ve been searching for ages for a solution to our alternator problem. We have a small, awsome little alternator from a toyota forklift. Unfortunately it comes with a v-belt pulley, not a 6PK pulley (which is used on the rest of the Rocam). Also, it doesn’t like high revs, and the test sheet shows its only able to handle about 6000 RPM for any extended time. The crank pulley on the Rocam is quite large, so if you put a small pulley on the alternator it is going to see some pretty high revs. This is NOT good, and others have mentioned burning similar ones out. So we want a big pulley which will fit the thing. The solution is a 6PK water-pump pulley, just like the one on the Rocam. If you attach this to the v-belt pulley, you are sorted. Well, we’ve been to several scrapyards looking for pulleys, with no luck. It seems you very seldom find a water-pump pulley separate from a water pump.

I posted for help on the forum (as I should have done first) and immediately found one pulley, and a suggestion to try Ford for spares. “Maybe they won’t be so expensive” – yeah right. So I got hold of Ford (it’s really worth telling these guys what you are doing, often they are very helpful) and I found out they do supply the pulley on its own. The price: r50 .11 ex VAT. I figured there was a number missing there – surely it’s R500.11? Nope, they ordered the part for me, and it came to R57 incl! Amazing. Even the guys at the parts desk were amazed (they showed me a much worse pulley for R900). The part number is XS6E-8509-AA if you want to find your own. I’ll post more info if it successfully gets attached to the v-belt pulley.

Our engine bay is now getting quite full, and we are becoming more and more convinced that the sequence we did the build in is just wrong. The brake and fuel lines really should only be going in once the immovable objects have had their say. As part of this blog I’ll put together a suggested build sequence.

Phew, long post! Till next time, happy building. Don’t forget, more build pictures here.

B

We’re back and busy! Our chassis got back about two weeks ago, and so it’s been a matter of chopping out the bits of life that had intruded on the build process. This weekend and past week have been the first opportunities to really get stuck in, and we’ve made some good progress.

The first thing was the chassis and work area. Messy, dirty, dusty. Seems the chassis travelled from Durban on an open trailer, during a storm. More like a mudslide, given the amount of dirt on it. The layer of dust on everything else was evidence of how long it’s been since we did some serious building.

Once we’d given everything a hose down and wipe, we were able to get stuck into the work. The big thing that’s been on the cards is the engine mount brackets. I managed to go to a scrap metal mechant and buy a length of tubing and angle bar. I also got some real insight into where all the bridge railings and street signs are ending up. We already have the upper brackets for LocostSA – they are awesome.

So we just need to construct the lower ones to meet the engine mount at 45 degrees. To achieve a nicely accurate 45 degree angle, the first approach was to use a piece of angle-bar with plate across the hypotenuse. However, we decided that it would be better to construct the whole thing out of plate steel.

So the brackets consist of 3 plates. The base will rest either on the chassis support plate (cut out in the previous post), or a tubular support. The main part of the bracket will be the angled plate, with a groove cut in it for the engine mount bolt to slide through. A similar groove is cut in the vertical plate. To get a neat 45 degree angle, the plate was clamped to a scrap piece of angle bar, lying with its open ends down. The result was reasonably pleasing, although not to watch-maker spec.

We test fitted the engine, partly to see what our options were with the engine mount brackets, and partly to see how well it all fits. There really is not a lot of space in there. Word of advice, remove the throttle support bracket (that piece of pressed plate steel that the throttle cable slots into, it’s attached with Torx-head bolts) before doing this. It really sticks out, and chances are you’ll break it off on something.

Then we fitted the bell-housing, to figure out what bits of it to remove so that the engine sits far enough back. It’s pretty apparent that a couple of spots get in the way, and prevent the engine from sitting nicely back. The angle grinder was used to remove the unwanted bits. We are counting on the bellhousing being over-designed – so that our handiwork doesn’t cause significant structural weakness.

Several months ago we tried removing the oil filter arrangement, so that we could fit a Locost SA remote oil filter. No matter how we tried, one bolt remained unmoving. However, it was a case of the right tool for the job. We tried again using a ring spanner, and managed to crack it. So that’s half the job done – next is fitting the remote filter bracket. We’ll be needing longer bolts for that though.

Starting work again like this was a reminder of how much time even the smallest thing takes. When the chassis arrived back, it had new (customised) wishbones installed. We decided to remove them to clean the chassis. It’s a simple job to unbolt the wishbones, but it takes over half an hour. So although it’s been good, productive and fairly long hours, writing it all down makes it seem so little.

Hopefully we’ll be able to get really busy with the build. More to come!

B