This is for Strut type shocks only (eg. front of silvia, evo, 86, etc). The easiest way to know if you have a strut is that it will have camber tops.
NOTE: Inside of a strut case (the threaded body on a strut) is red grease. You may find a build up of it on the chrome insert like this. This is not a problem and is only the excess grease working it's way out.
However over time and use all of the grease inside will eventually work it's way out.
It is recommended that you at least check and/or top-up the grease level in your struts every 2 years. Any form of grease similar to wheel bearing or moly grease will be sufficient. This can be done by yourself or a mechanic when following the instructions on this info sheet. Or you can send them to MCA Suspension and we can do it for you. A simple re-grease would cost $150 inc GST per pair of struts with a same day turn around if required.
Step 1: Make sure that there is no major spring preload on your strut before pulling it apart. A quick and easy way to know for sure how much preload there is, is to look on the spring for the 5 digit making that will read similar to 18006. The first three digits is the length of the spring. Measure the spring on the strut to see how much it is preloaded. If there is more than 10mm of preload I would suggest first measuring the position of your spring seats so you can return them later, and then wind the spring seats down until there is no preload.
Step 2: You don't have to remove the top mount to regrease the shock, but it may make removing the insert easier. If you choose to remove the top mount, you will need a 21mm socket on a rattle gun (electric/battery is preferred). Rattle off the top 21mm nut and remove the top mount, bottom spacer and top spring seat. make sure you keep track of all the parts so none are lost.
Step 3: You may or may not have to unscrew the bottom mount of your strut to get to the adjuster and bottom nut.
Once you have access to this area of the strut, use a 1.5mm alan key to loosen the grub screw on the adjuster half a turn only and then the adjuster cap should easily slide off.
Step 4: Now take a 19mm socket and rattle gun (electric/battery preferred) and rattle off the bottom nut.
If there is a washer below the nut, make sure it is not lost.
Now the insert is ready to be pulled out of the strut case.
Step 5: Make sure you hold the shock with the threaded strut case up. This is because there is a small washer sitting on the end of the shaft inside and it is possible it might fall off into the strut case if not done this way. Now slide the insert out slowly and carefully, try to drag as little grease out with it as possible.
NOTE: Do not lose this washer, or you will need to replace it with something similar.
NOTE: If you are adding grease of a different kind than what is currently in your strut case, or the grease in there has any dirt or grit stuck to it, you should wipe the old grease out with a rag and start fresh.
Step 6: In these pictures you can see there are two bushes and between them is filled with a Red substance. The Red substance is the grease that lubricates the insert so it can slide in and out of the strut case (threaded body).
If when looking at your strut case, it looks full of grease just like in this picture, then it is fine and you can reassemble your shock. But if it is not full and has large parts missing or none at all, then you need to fill the gap between the two bushes with more grease.
As said earlier any grease similar to wheel bearing grease or moly grease will do the trick. It's fine if you get some below the bottom bush.
A sharp edged, straight, flat tool such as a 6" or 12" metal ruler is perfect for the job. The back edge of a kitchen knife may also work depending on it's design.
One suggested technique to use is to get a lot of grease on the tool you're using, and then touch both bushes with the flat, straight edge of the tool at the same time and run the tool around the inside edge of the bushes, pushing the grease into the gap between them.
But either way, as long as you fill the gap with grease, when you refit the insert it will push any excess grease away.
Step 7: Reverse the steps and reassemble the shock. Make sure you have not lost any parts, and if you have to use an air powered rattle gun to do up the 19 and 21mm nuts please be gentle. About 30-40ftlb is all that's required.