TC Brass Engine Tags

Discussion of TABC-related matters
Tom Lange, MGT Repair
Posts: 162
Joined: Mon Jan 07, 2013 10:14 am

Re: TC Brass Engine Tags

Post by Tom Lange, MGT Repair » Sat Feb 23, 2019 5:30 pm

Duncan - Yes - you are right. I was reporting the two possibilities based solely on the engine number. According to Roger Wilson's article cited above, the early TC block was casting 24124 until 1947, and from then on the TC, Y and TD ALL used the 24146 block until July 1950. Then the TD used block 24445 until mid-1952, when block 168422 was introduced. It does not appear that there was a casting number change when the engine ID tag was moved to a newly-revised plinth from the earlier bell-housing location, although Roger does suggest that the drain-tap moved from under the exhaust to just behind the engine front plate in 1947, when the 24146 block was introduced. According to that the first 2,700 TDs all used the same 24146 block as the TC, 24146, but I though almost all TCs had the central drain tap. I must be wrong, and am struck by the differences between what Roger writes and what Neil Cairns (whom most people quote) writes.

Tom Lange
MGT Repair

User avatar
Steve Simmons
Site Admin
Posts: 833
Joined: Wed Dec 26, 2012 10:48 am
Location: Southern California
Contact:

Re: TC Brass Engine Tags

Post by Steve Simmons » Sat Feb 23, 2019 6:56 pm

I've never seen a TC engine with a forward-mounted drain tap. Does that really exist?
1949 TC8975 / XPAG 9609
http://www.mgnuts.com

User avatar
Duncan M
Posts: 347
Joined: Fri Oct 10, 2014 9:08 pm
Location: Northern California

Re: TC Brass Engine Tags

Post by Duncan M » Sat Feb 23, 2019 8:12 pm

The "forward" drain tap on a 24146 block indicates a Y type engine in the Roger Wilson article. That is how I read it.

Tom Lange, MGT Repair
Posts: 162
Joined: Mon Jan 07, 2013 10:14 am

Re: TC Brass Engine Tags

Post by Tom Lange, MGT Repair » Sat Feb 23, 2019 9:44 pm

Roger says, " Later, when the Y type was introduced in 1947, the block casting number became 24146 without any obvious design changes, although the drain valve was moved forward from behind the exhaust manifold. The TC engine changed to using the 24146 block at the same time, and the TD engine used the 24146 block from its introduction in 1949"

Doesn't it seem unlikely that they would change the casting of the Y-type drain valve in 1947, but not the indentical TC block, at the same time?

Tom Lange
MGT Repair

User avatar
Duncan M
Posts: 347
Joined: Fri Oct 10, 2014 9:08 pm
Location: Northern California

Re: TC Brass Engine Tags

Post by Duncan M » Sun Feb 24, 2019 12:43 am

Is not the real question if or if not the Y Type engines are casting #24146, and if the tap is "forward" from the TC location-- which is in about the middle. Both Steves late TC block and my late TC block have the tap in the normal central TC location, and are 24146 blocks. Where is the tap in the 24146 (early) TD blocks?

Neil says the Early T Series and YA block has a central tap (p49), and the YB has a forward tap (p52) but he is not sure the casting number. Seems like both articles are vague and worded poorly or ambiguous on this same tap topic.

Don Walker
Posts: 13
Joined: Mon Aug 01, 2016 3:16 am
Location: South Australia

Re: TC Brass Engine Tags

Post by Don Walker » Sun Feb 24, 2019 3:12 am

Tom, thank you for the chassis number, I have one more XPAG block and will let you know the number tomorrow if you can kindly let me know the chassis number for that one also. Someone down the track may want to know. All blocks have the water tap in the centre.

Tom Lange, MGT Repair
Posts: 162
Joined: Mon Jan 07, 2013 10:14 am

Re: TC Brass Engine Tags

Post by Tom Lange, MGT Repair » Sun Feb 24, 2019 11:00 am

Seems to me that there are such inconsistencies in what has been written about which castings were used in what cars when, that a bit of research and polling would be a good idea. I know that I am confused!

Don - happy to help with engine/chassis numbers.

Tom Lange
MGT Repair

Don Walker
Posts: 13
Joined: Mon Aug 01, 2016 3:16 am
Location: South Australia

Re: TC Brass Engine Tags

Post by Don Walker » Mon Feb 25, 2019 12:46 am

Thanks Tom, the last one I have is XPAG 4648.

Tom Lange, MGT Repair
Posts: 162
Joined: Mon Jan 07, 2013 10:14 am

Re: TC Brass Engine Tags

Post by Tom Lange, MGT Repair » Mon Feb 25, 2019 10:48 am

TC3975.

Best, Tom Lange
MGT Repair

Don Walker
Posts: 13
Joined: Mon Aug 01, 2016 3:16 am
Location: South Australia

Re: TC Brass Engine Tags

Post by Don Walker » Mon Feb 25, 2019 2:24 pm

Thanks Tom, regards Don Walker

Post Reply