Dipstick Survey Report

David Wardell and Roger Wilson, August 2020

We had 17 returns for the request on dipstick lengths, to which we have added three from details in the parts lists and workshop manuals. From these we have been able to make an initial stab at what dipsticks were used in which blocks and which T Type models.

The measurements we got for the same dipsticks generally match the expected values for the car and engine block into which they are fitted. And obviously the measurements made in the returns varied by a millimetre or two so we have taken the average.

So here are the results.

Block casting number	Car model	Dipstick tube Long tube is 111mm Short tube is 45mm	Dipstick number	Tip to Full (mm)	Tip to ferrule (mm)	Comments
24001	TB	No tube	MG862/69	42	206	Details from parts list and workshop manual, but the number 24052 has been seen on a TB dipstick
24142	TC	No tube	24164	42	206	Details from parts list and workshop manual, but the dipstick number SA2412/1 appears in a later parts list
24146	TC	Believed no tube	24164	42	206
24146	TD	Long tube	24407	42	303	Details from parts list and workshop manual
24445     (oval hole)	TD	Long tube	24407	42	303
168421 (round hole)	TD	Long tube	24407	42	303
168421	TF1250	Long tube	24407	42	303
AEF117	TF1500	Long tube	24407	42	303

We didn’t get a return for a TA MPJG block, but there was a return which listed a 24188 dipstick. As far as we know, this was only used in the early Y type engines, using the 24146 block with a short dipstick tube projecting 45mm out of the block. Also, we didn’t receive any returns for dipsticks fitted to Y Type engines, so if you have a Y Type engine we’d really like to hear from you.

The Returns

All the entries we got for the dipstick survey plus the three we garnered from parts lists and workshop manuals are shown below. And of course they show some anomalies which are noted in the Comments column.

Block casting number	Car model	Dipstick tube Long tube is 111mm Short tube is 45mm	Dipstick number	Tip to Full (mm)	Tip to ferrule (mm)	Comments
xxxxxx	TA	No tube	24164	42	330	The 24164 dipstick is for a TC engine, so this TA may be fitted with a TC engine (the block casting number was not supplied, but for a TA, block = 22288, dipstick = MG706/83). The 330mm is the length to the underside of the handle
24001	TB	No tube	MG862/69	41	206	Details from parts list and workshop manual
24142	TC	No tube	24164	41	206	Details from parts list and workshop manual
24445	TC	Tube – length not supplied	24104	41	206	This block is not a TC block (so from a Y or TD). The number of the dipstick could be 24164, which does not need a tube – although the 24445 block normally had the long tube
24164	TC	Short or no tube	24164	42	206	The block casting number is probably 24146 – with the last 6 and 4 swapped over
24414	TC	No tube	24164	41	206	This block is a Morris 10/M XPJM block, which did not have a dipstick tube
24146	TC	No tube	24407	41	305	It is thought that a 24146 block in a TC engine either had no dipstick tube (as reported) or a short dipstick, but the 24407 dipstick requires a long tube – so this combination is puzzling
24146	TD	Long tube	24407	42	303	Details from parts list and workshop manual
168421 (round hole)	TD	Details not supplied	24188	39	249	The 168421 block is normally fitted with the 24407 dipstick and long dipstick tube. However, the 24188 dipstick requires a short dipstick tube, but this was not specified
168421	TD	Long tube	24407	43	304
168421	TD	Long tube	24407	43	304
24445     (oval hole)	TD	Long tube	24407	42	303
168421	TD	Long tube	24407	40.5	304
xxxx	TD	Long tube	24407	41	304	Block casting number not supplied
6842	TD	Long tube	24407	42	303	It is thought the block casting number is 168421, with the first and last ‘1’ on the block either missing or unable to be read
24445	TD	Long tube	24407	41	302
168421	TD	Long tube	24407	40	303
168421	TF1250	Long tube	24407	42	303
AEF117	TF1500	Long tube	24407	40	303
AEF117	TF1500	Long tube	24407	43	303