After all the pipes are laid, you can install the tank.
The E30 had a total of three tank options.
The first - (16 11 1 176 250) is the rarest, was placed only in the first year of E30 production - until 83. In the ETK, its volume is 58 liters, but in the photo it looks smaller than the pre-restyling tank of 55 liters.
The second - (16 11 1 177 983) before restyling tank for 55 liters, installed from 83 to 87. Such a tank was installed on diesel cars even after restyling.
The third - (16 11 1 180 175) 63-liter tank, installed after restaining, since 1987.
Photo from the Internet - two tanks before restyling. 83-87 years on the left, up to 83 years on the right.
The photo shows that in the second version, the volume was clearly increased and a connecting tube was added between the halves of the tank.
In the third version, the volume was increased, but instead of the connecting tube, an "ejector" was used, thanks to which the fuel was sucked from one half of the tank to the other.
In my case, the second version of the 55-liter tank was installed. So, let's move on to the corresponding subdivision of ETK.
Fuel tank/fuel supply system
Part No. 7, 8, on the diagram, is a fuel level sensor, which is placed instead of the priming pump No. 10 with sensor No. 11 in complete sets without a priming pump.
Tank and filler neck details.
The clamps are new original, the rubber rings of the fuel level sensor and the fuel pump are new, the rubber gasket of the plug is new. The tank is attached at 5 points, but the number of bolts and nuts is not correctly indicated in the ETK. You actually need 4 bolts and 1 nut. By the way, I used stainless bolts and nuts. The neck pipe has different diameters at the inlet and outlet, so it can only be replaced with the original one. Fortunately, mine was preserved in good condition. The sump pump was cleaned and painted with zinc paint. The filler neck was sanded, coated with anti-gravel and painted. But I didn't really like her. And here's why.
In total, there were four types of filler necks on the E30. I had the simplest one - just a pipe. The rubber gasket of the plug was not very tight, and on the slalom, with an almost full tank, gasoline spilled out onto the wing. I heard that there was a case when this caused the car to catch fire during a burnout - it's good that they were able to put it out quickly. Therefore, just in case, I decided to replace the neck with a safer one - with a valve. Such nozzles were installed on cars that ran only on unleaded gasoline. But for some reason, both necks have the same ETC number (16 11 1 180 956). Then I noticed two interesting parts in the ETK, one of which turned out to be the same valve - #16 (16 11 1 180 157). According to ETK, it fits all E30s - I ordered it.
I will write about the second part No. 18 (16 11 1 176 708) a little later.
This is a plastic valve.
For some reason, I decided that it is placed at the junction of the upper wide part of the neck and the lower pipe. But no matter how hard I tried, the valve would not fit there. I just couldn't fit physically. So I decided to buy another neck with a valve. And after comparing them, it became clear that that valve cannot just fit into a regular neck. For it, a special landing ring is welded into the wide part of the neck, above the ventilation tube.
Why in the ETK these two necks go under the same number, and it is indicated that the valve fits both of them - is not clear. Although externally and in terms of fastening, they are really the same. But the new valve turned out to be superfluous
Well, let's talk about the types of necks - I also have a neck for an additional tank - it has a metal valve.
I have already mentioned this tank before, and I will write briefly again in the relevant ETC section.
And the last type of necks is a plastic neck that combines the expansion tank of the tank ventilation system. I'm not exactly sure, but it seems that such necks were put on touring cars of the last years of production.
So, I also brought the second neck into proper shape, as well as the tank. Although, the tank was still in excellent condition.
By the way, in the photo, there are four galvanized brackets that are placed at the places where the tank is attached - for some reason, they are not shown in the ETK at all.
Inside the tank is also clean and beautiful.
We install the fuel pump on the rubber rings, then screw the fuel level sensor to it, and the fuel supply and return hoses, which I wrote about in the previous section. We put a protective hose on the fuel supply hose and fasten it with a tie, fix the hose with tape. We install brackets on the mounting holes of the tank.
I immediately screwed the brackets of the protective shield to the tank - it's more convenient that way.
Everything is ready for installation. It is better to put the tank together. And by the way, it is much more convenient to put it before installing the rear beam and suspension. But in my case it didn't work out that way, so I had to tinker with it a bit. Let's start with the simplest. We insert the rubber spacer No. 18 (16 11 1 176 708), which I mentioned at the beginning, into the hole on the right rear spar.
I didn't have it before, but now the neck is more protected from rubbing against the body.
Next, a protective rubber coupling No. 17 (16 11 1 176 761) is also placed on the neck in place of the body bracket
We screw the neck with a bolt to the body bracket.
Now tank. An important point - first you need to lay the wiring under the bottom to the level sensor and the pumping pump, because after installing the tank it will be very difficult to do it. Also, be careful not to pinch the ventilation hoses between the tank and the body.
I already wrote that I had to remove the pump tank because it was in the way. The rear beam and suspension are also a bit of a hindrance, but we are not looking for easy ways!
As the practice of several attempts has shown, it is better to immediately tighten the two rear bolts with large washers, then insert the tank to these bolts with grooves, and press it back.
Then tighten the front central bolt on the cardan tunnel.
Then tighten the front right nut and evenly tighten all four fasteners.
Only then does the tank fall into place, after which we tighten the last front left bolt (without bracket) near the pump.
We screw the fuel supply and return hoses to the corresponding fuel tubes. The tank is in place.
We connect the filler neck to the tank with a pipe on clamps. It's also not very convenient, but it's done!
We connect a thick hose and a 6 mm plastic ventilation tube to the corresponding fittings of the tank. We connect the wiring connectors to the fuel level sensor and the fuel pump.
We insert four clips, put a gasket.
I also cut this pad from splenium, instead of the original one from paralon. And close the hatch with a lid on screws.
The tank is installed.
The following is not a large division of ETK.
Heat-insulating screen
Part #2 is not used. Apparently, this is a part for the tank before 83, which I wrote about above - in the photo on the right.
Part No. 13 is no longer available for order, but although it makes its way through the ETK, it is most likely also used together with that tank before 83.
Because there is simply nowhere to put it on my tank. My friend managed to buy it, but he also never found a place to install it.
So, there are two plastic shields that are attached to the bottom with three plastic nuts each, and a metal shield that is screwed to the tank with two brackets. The tank mounting bolts are also shown on the ETK diagram.
Here are all the details.
We screw on the left shield that closes the tank and the pump, and also presses the fuel pipes.
But the right shield that closes the tank.
The brackets of the metal shield are screwed to the tank.
Then we screw a metal shield to these brackets, which closes the connecting tube of the halves of the tank from the exhaust system.
The thermal screen of the exhaust system will then be attached to this shield.
Everything is installed.
The last unit of ETK remains - the first
Additional fuel tank
Another interesting and rare option in the fuel system section is the S850 Additional tank.
I've written about her before, so I'll just remind you. This option was available on cars with the M20 engine before restyling and on the M3. An additional 15-liter tank was installed in the trunk behind the rear seat partition.
Had his double neck
The entire trunk lining is also different.
I have most of it except the trunk liners, but I won't be installing that extra tank. Because this is the rare case when the original factory option is installed not "bolt-on", but with the use of welding and body drilling - the brackets must be welded to the trunk partition in place and a large hole drilled in the bottom for an additional filler neck. I have no desire to do this after painting the body. In addition, I don't have skins, and without them the look will not be aesthetic at all. Therefore, only the electrical part - wiring, and the sensor on the instrument panel will be installed. But that will be later. And we'll see... maybe someday I'll find the skins, then I'll install the tank. And for now it will lie as a collector's item
This concludes the large section of the ETK "Fuel supply system".
Although there will be two entries on the adsorber and the fuel filter, but that is another chapter.
