JohnCh
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The Regular Summary of Classified Ads of Se7ens Found For Sale
JohnCh replied to Croc's topic in Cars For Sale
Apologies @MV8, I took your comment very differently. Obviously, a bad interpretation by me. -
The Regular Summary of Classified Ads of Se7ens Found For Sale
JohnCh replied to Croc's topic in Cars For Sale
Where precisely did I write I don't want to see a transversely mounted engine? I wrote that I can't recall seeing one before. And I can't. That doesn't mean it's wrong or they don't exist, simply that I haven't seen it in the 25+ years I've been involved with se7ens, and I found it interesting. All the BEC I've seen over the years have mounted the engine longitudinally. -
The Regular Summary of Classified Ads of Se7ens Found For Sale
JohnCh replied to Croc's topic in Cars For Sale
I can't recall seeing a se7en with a transverse engine before. I wish there were more photos of the installation. -
Great first post; welcome to the forum!
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Hi @Timothy Keith-Lucas as per the original post, not all proposals are in this thread, and the intent was to keep it open through April to give people time. There is no rush to reach a decision. If nothing else comes in over the next couple of weeks, or if the people who have privately indicated to me that they are working on something don't need the extra time, then I will consider ending it earlier than planned.
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As per the thread below, we now have a new How-to Guides section in Articles that features @CBuff's post as the inaugural guide.
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I've made some navigation changes to increase visibility of the Articles section, and I have also added a new section there under the Owners Resources folder called How-to Guides. There are a lot of great threads that discuss how to perform certain mechanical procedures, but they require a search to find. The purpose of the How-to Guides section is to give those posts a second home and improve discoverability. If you have a thread that walks people through a process that you think is appropriate for the new section, please send a PM to @JohnCh and @Croc. In some cases, a single post can be lifted as-is, other times it will require pulling together multiple posts and performing some editing to make them flow. If editing is required, well look to the author to perform that work and provide it to us in a Word doc. Please note, a How-to Guide does not need to start life as a forum thread. Net new content is also welcome. Thanks, John
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Transmission oil change procedure for a Caterham with Mazda gearbox
JohnCh posted an article in How-to Guides
The following article is courtesy of @CBuff and was repurposed from his post below. If you have questions or comments about the procedure, please comment in that thread. Caterham 420 5 speed transmission fluid change Figured I would share. I’m a total mechanical novice so doing a transmission fluid change is a bigger undertaking than it should be. But I think it was successful. new 2023 caterham 420r delivered last June. Put 5k miles on it since last year and 7 track days. other forums and service suggest checking your transmission fluid level at the end of the season. The only way I could figure doing this was to remove the filler plug and stick my finger in there. Since that’s the hardest part of the job I figured I would just drain it and put in new fluid. checked the square fill plug (9/16 crescent) to make sure it comes off. then removed the 24mm drain I pulled back the carpet and cut the heat shielding that covered the hole in the footwell. nothing spilled out when I opened the filler hole. About 1.5 liters came out. Black and nasty for less than a year. Mag plug had decent amount of crud on it put about 1.8 liters back in via a funnel and tube (cheap amazon). When I went to check and pulled the funnel it was dripping out of the fill so guess that’s full. decided I should put a grommet( 60cm with a piece cut since the diagonal cross brace cuts thru the hole) back in the foot well and the heat shield plug (taped from the trans side). heat shield tape to cover plug stick carpet back down I started to wonder about the turret oil. Some Miata forums say to service this by pulling the shifter out. Decided I would see if there was any oil in there. (Sorry no photos of this) pulled the tunnel cover. Removed three 8mm bolts on shifter. Removed shifter (careful it drips trans fluid). Seems like there was a little fluid way down at the bottom. Thought I would top off. It took about 200ml to fill it just over the bushing receiver ). I read it should take 250ml from empty so it was either very low or I overfilled it. here is a video of some doing this in their miata took it for a test drive and nothing was leaking etc. so success for now. Sometime down the road I will extract the fluid out of the turret but I was pushing my comfort zone and thought just topping off was enough. so I can add to my first list. Transmission fluid. (Already did the oil twice, and diff fluid ). I enjoyed the experience and learned a bunch. Starting to get just enough knowledge to be real dangerous. -
Sticky posts can quickly get out of control if they aren't held to a very high bar. However, we can turn this into an article and post it in the Owner Resources section. I will make some other changes to aid discoverability. @CBuff shoot me a PM if you want to make any tweaks to that post for the article. To the rest of you, if you have a how-to that you wish to publish in that location, please let me know.
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I don't want to use an exact copy of the Caterham shaped 7. Period. As seen in images posted thus far, there are many other options. I don't see why we can't be more original rather than derivative, and not subliminally advocating for one brand. You are welcomed to disagree, and to publicly share that opinion, but as the person who donates their time to keep the forum running, I feel I've earned the right not to care
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In case you split the washers evenly because that is implied in the build manual, that is not necessarily correct. When Caterham introduced the Ikea-style build manual in an attempt to make assembly appear easy, they left out information from the earlier, and more thorough written manual. In the case of the washers, the Ikea diagram shows the same number washers on either side, implying they should always be equally split. However, from page 129: "Measure from either side of the differential carrier to the outboard side of the chassis (outboard of rear ARB mount – 1” BOX) to centralise. During this process there will be a need to pull the bottom bolts out and use shim washers (item 21 in pack 30Z1067A) inserted in between the metalastic bush and carrier as necessary. You may now use the ½ x 11” top bolt (schnorr washer under the head). It is optional to grind a chamfer on the end of the bolt (threaded part 45 degrees x ½”) as this makes it easier to slide and locate the top bolt. Ensure there is plenty of copper slip used on the bolt. You will also need to space the upper bolt between the carrier and the metalastic with shim washers. Use a ½” nyloc nut and schnorr washer to fasten the bolt." You might have it centralized, but it would be good to check. The written manual is in the Library:
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I prefer the simplicity of this one. It just needs some color.
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The size likely impacts the shape of the torque curve and idle quality, but it shouldn't make the car undrivable. However, it is worth mentioning given you're considering replacing them.
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With my limited skills and tools, changing the color requires a lot of work. This is all done in powerpoint and using some lightly cleaned up images found on the web. This is why we either need something created correctly by a graphic artist or cleaned up by one afterwards. That is also necessary to ensure it prints okay on various background colors. I removed the rollbar from the original image as I thought it was overly busy, and I wanted the Seven element to be more abstract than literal. See below.
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Two variations.
