Search found 362 matches

by Duncan M
Wed Feb 13, 2019 11:38 am
Forum: TABC Chat
Topic: TC Brass Engine Tags
Replies: 49
Views: 4613

Re: TC Brass Engine Tags

Tom, not sure what you are saying about 4th quarter? D is 4th letter of alphabet and 1940 begins the 4th decade of the 20th century. I have no idea how Nuffield or BMC may have done things on their TD or TF blocks. It is just a Morris quality control foundry date code. Similar to how certain other p...
by Duncan M
Tue Feb 12, 2019 9:10 pm
Forum: TABC Chat
Topic: TC Brass Engine Tags
Replies: 49
Views: 4613

Re: TC Brass Engine Tags

Check the engine production date code, which is a few inches above the dipstick hole. First number(s) is month, and then D indicates 4th decade of 20th century, last number is the year specific to 4th decade. ie D 9 = 1949. My TC was made in October '49 and the engine was made a couple months before...
by Duncan M
Tue Feb 12, 2019 12:14 pm
Forum: TABC Chat
Topic: TC Brass Engine Tags
Replies: 49
Views: 4613

Re: TC Brass Engine Tags

Octagon tag sure has a lot of patina. Hard to imagine how a tag on the side of the engine would get worn down like that unless it and the engine were dipped in acid. For chassis number why not check the left dumb iron where it will have been stamped? The chassis number for each car is located on the...
by Duncan M
Sat Feb 09, 2019 11:52 am
Forum: TABC Chat
Topic: Mistakes on the "factory" TC wiring diagram? What to do?
Replies: 5
Views: 813

Re: Mistakes on the "factory" TC wiring diagram? What to do?

Various sources talk about reducing the performance of the ignition by use of "backward" coil polarity. Keep in mind that is a loss of "potential" performance that very few people are ever going to experience using the original coil. They are talking about a potential loss of performance IF your eng...
by Duncan M
Tue Jan 29, 2019 4:59 pm
Forum: TABC Chat
Topic: Polarity of Ignition Coil
Replies: 10
Views: 1162

Re: Polarity of Ignition Coil

TC's came from factory with positive grounding. The switch was connected to SW and the contact breaker was connected to CB on coil. If switching to negative ground, then those can be reversed.
by Duncan M
Sun Jan 27, 2019 9:39 pm
Forum: TABC Chat
Topic: TC steering column bush replacement
Replies: 4
Views: 688

Re: TC steering column bush replacement

Original steering box (with no tomkins kit) does allow for precise adjustments. The Tomkins kit only addresses one of the two critical adjustments to the Bishop Cam steering box, and neglects the "end plate" adjustment. End plate adjustment gives the critical "pinch" to the ball bearings on either e...
by Duncan M
Sun Jan 20, 2019 3:55 pm
Forum: TABC Chat
Topic: Ignition and fuel warning lamps
Replies: 9
Views: 1202

Re: Ignition and fuel warning lamps

Same bulb as in most any "old fashioned" flashlight with two batteries. 2.2 to 2.5 volts. 0.2 to 0.5 watts is typical.

An article here:
http://ttypes.org/ttt2/one-of-lifes-little-mysteries
by Duncan M
Sun Jan 13, 2019 9:51 am
Forum: TABC Chat
Topic: MG TC starting problem
Replies: 7
Views: 1052

Re: MG TC starting problem

Check, clean, dry ignition points.
by Duncan M
Mon Jan 07, 2019 10:54 pm
Forum: TABC Chat
Topic: TC master cylinder
Replies: 6
Views: 1091

Re: TC master cylinder

Who re-sleeved and rebuilt it, Neil? Do not bench bleed a TC M/C. Unfortunately the art of rebuilding hydraulic components like brake M/C's and wheel cylinders has been mostly lost to all but the most serious car hobbiests. There is a very good reason Castrol came out with vegetable oil based "Red R...
by Duncan M
Sat Dec 29, 2018 9:19 am
Forum: TABC Chat
Topic: Pertronix - motor will not stop running when key tunred off
Replies: 12
Views: 1280

Re: Pertronix - motor will not stop running when key tunred

Ignition timing changes significantly when you follow instructions. Did you use a timing light and adjust timing?

When key turned "off" the power should stop going to coil from the ignition switch.
by Duncan M
Thu Dec 27, 2018 7:44 pm
Forum: TABC Chat
Topic: MG TC Wheel Cylinders
Replies: 5
Views: 951

Re: MG TC Wheel Cylinders

Just for the record, the TC was not made with any UNC or UNF threadform bolts attached. The ones in front had BSW threads (18tpi) and a 1/4W head, and the rear cylinders were mounted with bolts with BSF threads (28tpi) and (I think) 3/16W heads. Typically new hydraulic wheel cylinders come with new ...
by Duncan M
Wed Dec 26, 2018 3:57 pm
Forum: TABC Chat
Topic: Trouble shooting loss of electrical power and ignition
Replies: 4
Views: 881

Re: Trouble shooting loss of electrical power and ignition

Almost sounds like it could be something going on with the ignition switch. Are you running points or electronic ignition?

This site has a new article in the resources section all about the TC electrical system. Check it out.
http://www.mg-tabc.org/library/mgtc-ele ... rcuits.pdf
by Duncan M
Mon Dec 24, 2018 12:57 pm
Forum: TABC Chat
Topic: TC starting handle
Replies: 14
Views: 1601

Re: TC starting handle

The TC EXU's (front and rear bumpers) had the longest at near 29" total. FromTheFrameUp in tech tips for "tools" says the shortest 24" total was used in early cars. The intermediate 27" length Steve mentions must be the most common.
by Duncan M
Mon Dec 24, 2018 11:02 am
Forum: TABC Chat
Topic: MG TC Wheel Cylinders
Replies: 5
Views: 951

Re: MG TC Wheel Cylinders

Mounting bolts for wheel cyl's were originally 5/16 Whitworth bolts which are 18 TPI and the head was intentionally undersized to take a 1/4W wrench. 18 tpi 5/16W threads are similar to 5/16UNC 18 tpi. See: https://mossmotors.com/media/instructio ... 0_INST.pdf
by Duncan M
Sat Dec 22, 2018 7:27 pm
Forum: TABC Chat
Topic: Mystery holes
Replies: 8
Views: 1183

Re: Mystery holes

Maybe not overkill when you consider the seats routinely got wet/damp back in the good old days. Holes to help dry out.
by Duncan M
Tue Dec 18, 2018 11:44 am
Forum: TABC Chat
Topic: TC starting handle
Replies: 14
Views: 1601

Re: TC starting handle

No TC crank handle should be under 24"
by Duncan M
Fri Dec 14, 2018 4:09 pm
Forum: TABC Chat
Topic: Door trim piping
Replies: 4
Views: 914

Re: Door trim piping

Ian- You are talking about the trim that goes around the outer edge of the TC door cards? It sticks out from under the card everywhere but the bottom and back (rear) edge. At the rear edge it is completely under the card. On mine anyways, and it is original interior. Makes for a perfect fit on mine,...
by Duncan M
Thu Dec 06, 2018 5:51 pm
Forum: TABC Chat
Topic: Dirk Dondorp
Replies: 5
Views: 950

Re: Dirk Dondorp

Dirk always had good insights and clever ideas for enjoying a TC. Always friendly and helpful. One I remember was a discussion on using a Shimano (bicycle) seat quick release on the steering wheel. One of the few modifications I ever tried on my TC, and it has come in handy a number of times. 100% r...
by Duncan M
Fri Nov 30, 2018 11:28 am
Forum: TABC Chat
Topic: TC engine overhaul
Replies: 16
Views: 2679

Re: TC engine overhaul

Due to the low surface area to volume ratio of a tiny o-ring, the original properly assembled valve seal method is not prone to "drying out" from not being in everyday use. The metal deflector and tiny o-ring arrangement works remarkably well under a wide range of engine builds.
by Duncan M
Thu Nov 15, 2018 9:32 pm
Forum: TABC Chat
Topic: Looking for a BOOST gauge
Replies: 2
Views: 794

Re: Looking for a BOOST gauge

Great ideas for building your own boost gauge on youtube.
https://www.youtube.com/watch?v=M1qiX-Om9zs