Lotus Elan

1965 Seven S2

PostPost by: SENC » Tue Dec 08, 2020 11:54 pm

Cheeser wrote:Excuse me but I think we drive on the correct side of the road and if you drive iconic British cars, then you need to understand which is the nearside of the car!! :lol:

And I bet you use oil in your trunnions, too! 8) :lol:
Henry
69 Elan S4
65 Seven S2
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PostPost by: SENC » Sun Dec 13, 2020 11:27 pm

Fun weekend pulling bits out, culminating with engine and gearbox today thanks to some help from my son (home from college). Not easy-peazy, but definitely easier to work in the Seven bay than the Elan bay. Similar angle of the dangle.

engineout1.jpg and


engineout2.jpg and
Henry
69 Elan S4
65 Seven S2
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PostPost by: SENC » Sat Dec 19, 2020 11:37 pm

Pulled the rear axle and shocks all around, as inspecting the dampers and determining their needs was one of my intended winter projects. Very pleased to find what are likely the original Armstrong dampers, given the 11/64 date codes on each - so plan to have them tested and rebuilt if I can find someone to do it. Porter Racing has been recommended - anyone else?

shock1.jpg and


shock2.jpg and


With those out, next project is to begin disassembly of the gearbox to check on all of the internals and, if necessary, rebuild. I'll also pull apart a spare I acquired a little while ago while doing it, in case I need bits. They appear to be similar age, both T3 marked. Are any of the markings on these gearbox cases date codes?

gearbox.jpg and
Henry
69 Elan S4
65 Seven S2
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PostPost by: gjz30075 » Sun Dec 20, 2020 8:48 pm

The markings between the ribs are the date codes. Here are some examples. Format
is year, month, day. So, the bottom example is 4=1964, M= December, and 4= the 4th of
December. The letter "i' is not used. Good reference here:
http://automotivemileposts.com/ford/for ... mbers.html
Attachments
IMG_0437.JPG and
IMG_0436.JPG and
IMG_0435.JPG and
Greg Z
45/0243K Sprint
36/5727 pre airflow coupe
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PostPost by: SENC » Sun Dec 20, 2020 11:39 pm

Thanks Greg. My gearbox from the 7 was built in February 1965, and my spare just a few months earlier in June of 1964. In trading emails with another member, I also learned there are date markings on the tailshaft extension (both of mine we made in late 64).

I noted these markings on the box from my 7 - I presume the CR identifies it as a close ratio box originally (still is based on counting the teeth). My spare has the standard ratio for Sevens.

IMG_20201220_173614.jpg and


Overall, the inside was extremely clean and looked really good. Baulk rings have lots of life left and selectors showing minimal wear. The only real issue I noted is a small, distinct area of previous corrosion on the layshaft - but the roller bearings look very good. Possibly it sat is ne position for a long time? Or the bearings were replaced but not the layshaft, and it just hasn't been used much since?

IMG_20201220_173447.jpg and


IMG_20201220_174207.jpg and


IMG_20201220_173345.jpg and
Henry
69 Elan S4
65 Seven S2
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Posts: 741
Joined: 30 Dec 2015
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PostPost by: rgh0 » Mon Dec 21, 2020 7:19 am

I see similar surface failures on many old layshafts, while the rollers appear not to suffer damage. I think its due to normal wear on the layshaft roller running surface not corrosion.

Time to replace both the shaft and rollers

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PostPost by: SENC » Sat Dec 26, 2020 6:48 pm

Thanks Rohan. I'm pulling apart a spare box at the same time, and was lucky to find a layshaft that looks almost as if it hasn't been used at all - possibly a previous rebuild that just sat (the person I acquired it from got it as an "extra" with a used elan purchase decades ago and it has just been sitting since.

Both boxes are early, 17mm driveshaft and drawnut/separate 1st gear bushing gearboxes. The Seven, as expected had a close ratio gearset - the spare a standard (for the Seven) gearset, so a pleasant bonus to have options as well as some spare bits that are in quite good shape.

strippedgears.jpg and


ringsandgears.jpg and


mainshaft.jpg and
Henry
69 Elan S4
65 Seven S2
SENC
Fourth Gear
Fourth Gear
 
Posts: 741
Joined: 30 Dec 2015
Location: NC
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