Bell Houseing Bolt Size

[log burner]

HI ALL
ok ive heard some wear that ive got to slighty drill the bolt holes out in the series box to fit the later engine and plate or iam i dreaming


and i need in-ex valve clearancs for a 1986 2.5d
also is ther a way for locking off the pullys on the engine b4 i remove the belt ive only seen the arorrow on the time case ................cheers jay

[onslow]

Originally Posted by log burner

HI ALL
ok ive heard some wear that ive got to slighty drill the bolt holes out in the series box to fit the later engine and plate or iam i dreaming


and i need in-ex valve clearancs for a 1986 2.5d
also is ther a way for locking off the pullys on the engine b4 i remove the belt ive only seen the arorrow on the time case ................cheers jay

If I remember rightly the 2.5d bolts are M10 as opposed to the slightly smaller 3/8 unc/f of the 2.25 so you will have to drill the holes out to 10mm,the timing pullys can be lcked by use of M8 bolts thtouch the pulleys clamping the back of the timing case be careful not to tighten them up too much or you could crack the pulley

[Nilhan WeeraSinha]

Hi All,

I thinking of fitting a new engine on my S111 2.25 diesel ( 1982 )

Will the S111 gear box take a 200 TDI engine direct ?

Regards
Nilhan

[Greg S]

Well Knock my socks off!

I just came here tonight to announce how surprised I was to discover that the bellhousing bolts on my 1970 2.25 are standard American size, and guess what post was at the top of the list?

You could have knocked me over with a feather when the guy at the nut & bolt shop told me the course end was normal 3/8 course thread. I asked him to check the fine thread part to see if anything he had would fit. Damned if it wasn't normal 3/8 fine thread. And to think of all the time I spent around here looking for two 'weird sized' nuts to fit inplace of the two I lost last time I took it apart.

Just as a treat, I might buy a whole new set of bellhousing studs and nuts. Now wouldn't that be weird, having the nuts all the same size and only having to use one socket to put it back together.

Greg S

[onslow]

I believe they are UNC and UNF (UN=unified national) which i believe stemmed from WW2 for standardisation for component parts for military machines between foreign nations so indeed they will be the same

[onslow]

The SIII box will take a 200 TDi If the box is in top notch order and uses a top spec lubricant,I myself would fit a re-con box just to be sure.

[Nilhan WeeraSinha]

Hi Onslow,

Thanks for your reply.

You say a 200 TDI engine will fit directly on to a series 111 gear box without an adaptor plate, this is great!.

Now another question what is a LT77 gear box ?

Well I was thinking of replacing the gearbox as well and understand that good recon S111 boxes are not easy to find so it may be better to fit an LT77.

If the 200TDI fits directly onto a LT77 will the LT77 fit the S111 Transfer box ?.

I live in Sri Lanka and have to import the parts so I need be double sure I order components that will fit togeather without adaptor plates etc.

Will appreciate your assistance

Cheers
Nilhan

[onslow]

Originally Posted by Nilhan WeeraSinha

Hi Onslow,

Thanks for your reply.

You say a 200 TDI engine will fit directly on to a series 111 gear box without an adaptor plate, this is great!.

Now another question what is a LT77 gear box ?

Well I was thinking of replacing the gearbox as well and understand that good recon S111 boxes are not easy to find so it may be better to fit an LT77.

If the 200TDI fits directly onto a LT77 will the LT77 fit the S111 Transfer box ?.

I live in Sri Lanka and have to import the parts so I need be double sure I order components that will fit togeather without adaptor plates etc.

Will appreciate your assistance

Cheers
Nilhan

Hi Nilhan,
the Tdi will bolt straight up to the s3 box using the s3 clutch and also the bellhousing holes drilled to 10mm to take the tdi studs

The Lt77 is the box used in 90/110s and early discos and also mid eighties built Range rovers but was not the best of boxes as it was taken from the rover cars of the late 70s and really wasnt up to the job,If your series box is fault free then I would stick with that.

If you upgrade to a Tdi I would recommend upgrading the brakes is yours an 88 or 109?
Cheers ONz

[Nilhan WeeraSinha]

Hi Onz,

Thanks for that infomation. My S111 is a 1982, 88 inch hard top.
I have already got a servo and dual line master cylinder installed plus a Isuzu fargo FWR power stearing box.

Runs pretty well on my Jungle trips. The gear box is what need attention a lot of effort is required to change gears. This is why i was thinking of a updated gearbox. I was told somewhere that the Leyland Sherpa used the Land Rover 2.5 N/A engine. if this information is correct does this mean that the Sherpa gear box will fit the S111 transfer box? I hope I am not asking too many silly questions.

Best Regards
Nilhan

[onslow]

Originally Posted by Nilhan WeeraSinha

Hi Onz,

Thanks for that infomation. My S111 is a 1982, 88 inch hard top.
I have already got a servo and dual line master cylinder installed plus a Isuzu fargo FWR power stearing box.

Runs pretty well on my Jungle trips. The gear box is what need attention a lot of effort is required to change gears. This is why i was thinking of a updated gearbox. I was told somewhere that the Leyland Sherpa used the Land Rover 2.5 N/A engine. if this information is correct does this mean that the Sherpa gear box will fit the S111 transfer box? I hope I am not asking too many silly questions.

difficulty in changing gear can indicate clutch trouble,
is the box struggling to change gear on the move or at a stand,does it crunch when changing gear or pop out of gear at all?

Best Regards
Nilhan

Not at all, the 2.5 was fitted to early leyland sherpa 400 series vans but the gearbox wasnt interchangeable the s3 transfer box Im not saying its impossible to do but have never heard of one being converted,
The series 3 box is quite an easy box to re build its really only bearings and syncro hubs that need replacing and can be done in a few days with the help of the workshop manual.

[Nilhan WeeraSinha]

Hi Onz,

Thanks again.

The gear box was rebuilt once using new bearings and a few old parts from another old gearbox I was able to find.

It is difficult to get into reverse gear and it tends to jump out of second when going down hill.

Do you have any tips on solving this problem?

Regards

Nilhan

[onslow]

Originally Posted by Nilhan WeeraSinha

Hi Onz,

Thanks again.

The gear box was rebuilt once using new bearings and a few old parts from another old gearbox I was able to find.

It is difficult to get into reverse gear and it tends to jump out of second when going down hill.

Do you have any tips on solving this problem?

Regards

Nilhan

Reverse is notorious for being bad to get I have seen many reverse idler gears with a number of teeth missing although This normally causes noise whilst reversing.

You could check the detent spring and plunger these can stick and the plungers do wear if these have stuck or being damaged this can allow the relevant gear to pop out.

they are located on the top cover off the main box one on either side and one under a big nut in the middle the side ones are retained by an "L" shaped retainer held in with a small bolt.

once the retainer is removed the detent spring can be removed then the plunger itself,the plunger should look like a steel "tic tac" but they tend to wear to a wedge shape simply turn the plunger over using the other end.

Also strech the spring slightly to apply more force to the plunger.

If this doesnt work then the syncro hub is probably worn and needs replacing.

Cheers ONz

[Nilhan WeeraSinha]

Dear Onz

Thanks for the valuable info.

I will get back to you when I get onto the job.

Best Regards

Nilhan

[Greg S]

Originally Posted by onslow

I believe they are UNC and UNF (UN=unified national) which i believe stemmed from WW2 for standardisation for component parts for military machines between foreign nations so indeed they will be the same

That may be well and fine, but how do you tell ahead of time what damn thread is going to be on the bolt or stud? I bought new nuts for the bell housing studs but the tranny-to-transfer case studs are a totally different fine thread but the same diameter. I have to have ASE, Metric and BS wrenches and sockets to do any major work on the thing and have to be incredibly careful about what nut came off which stud so it will go back together again.

Greg S

[afirover]

go buy a thread gauge and be done with it