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MG MG Y Type - dip stick correct length

Have always wondered if the correct dip stick for the oil is correct on my car. Have checked NTG and they state a measure of 362mm (what does this mean). Mine is overall length of 415mm and a length of 305mm from the stopper to tip.
Do these measurements make any sense and if not what should they be.
Frank
F.G. Russell

How long is your dip stick tube Frank? Check Let there be Ys as I think there is a section in the ENGINE chapter on dip sticks.

Currently in Australia looking forward to the International Gathering of Ys organized by Tony Slattery in a few days!

Paul
Paul Barrow

Hello Frank, I am just assembling a XPAG engine for a Y-Type now, so can answer your question.

Early XPAG blocks had a dipstick tube that sticks out of the block about 2 inches (50mm). Later XPAG blocks had a dipstick tube about 4 inches (100mm).

For a short tube block you need dipstick # 24188 & for long tube block you need dipstick #24407. This number should be stamped on the dipstick above the full mark.

The distance from the stop cap on the dipstick to the full mark is 8 5/8 inches(215mm)for #24188, and 10 3/8 inches (265mm) for #24407.

Incidentally, a full sump of oil should be 80mm deep to reach the full mark. The Y-Type sump is around 7 1/2 inches (190mm) deep from the block face. The splash plate is 3 1/2 inches(90mm)above the bottom of the sump.

The overall lengths are 362mm for #24188 & 415mm for #24407. Looks like you have a #24407, but what tube do you have in your block ?.

These are rounded dimensions - there can be up to 1/4" (6mm) variability in some of these dimensions.

I hope this answers your question.

Cheers

Tony
A L SLATTERY

PS - stopper to tip dimension is 305mm for #24407 & 255mm for #24188.
A L SLATTERY

Thanks Paul and Tony. Mystery resolved. My engine is out of a YT so it has the longer tube of 4.25 inches and dip stick #24407. What I have been concerned about is the markings for the oil level. If I fill to full it seems to quickly run down to just over the half full level and stays there. Will be doing a complete oil and filter change in the next month and will see where the level is after doing that.
Frank
F.G. Russell

It is going somewhere Frank. You are either leaking it out or burning it.

Not that it is a huge indicator but what running PSI and idle PSI are you getting?

Paul
Paul Barrow

What sump is fitted to your engine Frank ?.

Does it have a flat bottom, or does it have cooling fins on the bottom. Finned sumps have a larger capacity than the flat bottom Y-Type sump.

If you change your filter when you do an oil change the oil level will drop when the filter fills up, but I would not think it should drop that far (19mm) 3/4".

Tony
A L SLATTERY

This thread has solved a mystery for me. A previous owner has cut another mark on the dipstick along the RHS of the U in full. The measurements and info given here have shown that it is the correct dipstick and the original markings are correct. I can now stop splitting the difference,
Regards, John Y4895
J Foster

Had Vi out yesterday and checked the oil pressure, it 25 at idle and 50 running. I have the flat bottom sump. Put down paper under the engine when parked and just checked, no leakage from the ream main and very small amount from the front. So when I change the oil and filter will check level on dip stick to start and will keep a very close eye on any leakage.
Frank
F.G. Russell

Sounds good Frank - keep us posted please.

Paul
Paul Barrow

A bit more "useless" (or maybe not ?) information on dipsticks & sumps.

Based on the internal dimensions of the sump, the depth of oil is around 19mm (3/4") per litre, so you need around 4.3litres to reach the full mark on the dipstick.

The hole in the oil pickup is around 35mm above the base of the sump, so if you have less than 2 litres of oil (LOW on dip stick), you can start pumping air & not oil.

So always remember that there is only 2 litres of oil from FULL to LOW, only 2 litres from FUN to DISASTER !.

I have quoted litres here, so as not to confuse units of UK gallons, quarts & pints and US gallons quarts & pints. A litre is 1000cc - that's the same everywhere !

Cheers

Tony Slattery
A L SLATTERY

Conversions are:
4.3litres to reach the full mark on the dipstick = 0.9458674 Imperial Gallons or 1.13594 US Gallons

2 litres of oil from FULL to LOW = 0.4399383 Imperial Gallons or 0.5283441 US Gallons.

Always keep an eye on oil levels and ensure you have the correct grade of oil too and change it ... regularly too.

Paul
Paul Barrow

Dear All,
I discovered that on my car (Y5671) no dipstick tube is fitted ( same as on the engine illustration C17 of the original maintenance manual ) and that the dipstick has three marks : stop cap to full I : 159mm, stop cap to full II : 215 with inscription "MAX" , stop cap to empty : 226 mm ( see attached image ). The overall length is 390mm, the engine has the flat bottom sump fitted. The difference between first and second mark is 56 mm, this could be equal to the length of the dipstick tube of the early XPAG that you mentioned.
So what mark should I use to fill up the oil ? Or where to get the right tube from ? Thanks in advance for your comments.
Maximilian

Maximilian Burger

This thread was discussed between 30/05/2017 and 06/06/2017

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