Alloy Barrel Won't Budge - 57 T100

Time for new 10:1 pistons to give her some more go!!
Head came off real quick and all 8 nuts holding down the barrel removed ... The barrel will not move .. rock solid ! and being alloy, this motor has to be given a lot of respect. i.e. no heavy hitting.
Have I missed something ? or could the alloy be binding on the studs somehow. Or something else maybe. :? This motor has had rebuild in 2014 by a Triumph mechanic who I am unable to contact.
Any tips or tricks would be appreciated.
Cheers O/R

High Dome pistons could well cause the Advance to need Retarding , Reducing the Power .

PLIO-BOND if used is a glue / Gasket Sealant . Red Colour .

Refitting the HEAD , sans pushrods - should lift the barrels . Replace the base nuts 1/2 down .

Hopefully the injuns still in the chassis ?? .

Big Bearing Cases ??

JoMoCo Valves ( and springs - identical to Norvil ) in my T100R were 1 5/8 & 1 7/16 Dia.

Class ' C ' allowed 7.5:1 C.R. on o.h.v. . This was good for around 50 horse , and 8.000 rpm .
On The Cam @ 5.000 with the Inlet the Tooth Fwd ( Not the tooth back ) Reqd. C.R. box .
Early 60s race cams . Motor Built pre 64 .

Have you read all the T100R & RR tripe on the Triumph Page ?? triumph-100-100-1955-t14348-45.html

Mine Measured 7.25 C.R. . On 100 Octane buttoning off @ 7.200 a Methanol Burning 640/750 ridgid passed .
On the Gas Again regained the place , buttoning off @ 7.600 .

Gearing 1`20 @ 7 related to 130 @ 7.6 , or 135 @ 8 .
Id thought Id been using 8000 on the short circuit , which I had .
Dual 1 1/16 monoblocks , one chopped . 1 5/8 bore ? pipes( same Dia as Steel head fittings, maybe not yr std t100 on the 'R's ? )

Intake Ports were 1 1/16 bore . The Engine in the machine in ' The Bonnie Book ' Id assume . maybe p55 , Morrie Lowe .

So NOW you KNOW . Needle Rollers ( as per Layshaft ) in drive side case for cams , same on cam idler pinnion .
Std. tacho drive replaced Dyno. ( mine wasnt ) . Valve Clearance was ( supposed to be ).010 all .

I used a reversed 750 oil pump . the body brazed & redrilled etc .

Check out the rear subfame & ' mufflers ' on this sucker . http://www.ebay.com/itm/Triumph-Tiger-/ ... 2100890391 thirty Hours to GO .



Theyre ' C ' . or somesuch . C being the pommy version .
Hard to tell with all the murk what the Eng. No ACTUALLY is . Is there a C or R , is it really a 52 .
the R subframe was more like a W.D. issue , for flat track . Steering Head has differances too .

The T100R intake flange / bolt pattern is not the Std T100 Either .

The Fork Shrouds are Intresting . Be Intrested to know What Spec this sucker IS . :?

Thanks Matt Spencer
Injin still in, so head goes back on tomorrow see if I can pop the barrel .Not much comp to work the magic but.
Doubt if it is the gasket glued on, cause the last guy to work on her was a "not to much goop" sort of guy.
Maybe I should leave the c/r as is...only 98 octane max at pump down here.
Get some compression is the priority.
Cheers.

Thanks Matt but that trick didn't work.
Head back on plugs back in and kick her over .... all comp went back down into the crank case... bummer
That old tiger on e-bay could be a prospect at the moment the way I feel.
Anyway I will leave it for now and wait till technology catches up. There must be a way!!!
Cheers O/R :cry:

You don't need to rely on compression.

Take the head off again, put some rags in the cylinders, replace the head (leave pushrods out) and try again.

Or Fill Em With OIL . Then put the plugs back in.

Id put the SAME AMOUNT in Both Cylinders , though ! . Measured .

Ok ! I didn't read between the lines or... I read the wrong lines more like it.
I am only doing this job myself cause the so called Triumph "expert" stuffed it .
what made it worse is that he blamed me for screwing up the "run in" and damaging the motor after all his good work ...huh?
He redid the work at my cost...ugh!
Looks like he has stuffed it again. I will know when the barrel comes off.
Needless to say, no wish to further the relationship.
Remains to be seen what pistons and rings have been used and what condition they are in now. I can see that the bores are well glazed .
I will certainly employ a proper engineer to mike up the barrel and make sure that new pistons are the correct size to fit with correct tolerances etc.
What is the standard bore size I might expect on a 57 alloy T100 ?
Thanks for all your help.
Cheers
O/R

What is the standard bore size I might expect on a 57 alloy T100 ?

Click to expand...

Sufficent !

You Mean OVER Bore ??

dunno .

But the sleaves on mine are pressed in , and arnt TIGHT , a drop of heat ( or even a drop of no heat ) and they push up .

So If Theres New Sleaves about , you can go to Std. bore . Id Think 1.5 mm thick'd be thinnest permissable .
Measure the stock thickness at the bottom . Dont go forcing them around needlessly , though .

Think the ' C ' kit pistons were 12:1 C.R. , I wouldnt go above 9.5 :1 measured .
Oil From Burrette down plughole ( C/L plug - vertical ) at T.D.C. method .

Thanks Matt,

Shame to have this baby sitting down the back of the shed.
Get the barrel off and she 'll be all go.
Did measure the bore, best I could with my ancient instruments came v. close to 2.484
Is that pretty well close to standard ? I know she has been honed a couple of times !!!
Don't know what the pistons measure yet.

Got them barrels off yet??

No F/E
Any ideas
Tried most suggestions listed here.
About to try oil in the bores with head back on and slowly kick her over.
Cleaned up top of pistons and the head in prep for this.
Hope this eases the barrel up a bit
It's got to be the gasket!!!!
Let you know.

Just Fire it Up with the Base Nuts OFF . :lol: or maybe 1/2 off . :twisted:

Suppose 1/2 full would give max leverage , on the poor old crankshft . :?

20 cc of nitro in the cylinders , and hit the spark , simultaeneously .

Ran out of juice in the austin morriss mg montego vandenplas , no wallet
so tipped in some model aero fuel . a few cranks and it sounded like the
head bolts were stretching , so I walked home and got the wallet , seeing
I was stopped opposite a gas station . Methanol neat has got us to the gas
station a few times . The Old CF was like it had an extra cylinder with a
bit of that in the tank . Old CASTOR based fuels , a drop wont hurt anything
as an additive . Use the dregs of trhe plane fuel usefully .

A new blade in the Stanley Knife and you might pare the gasket in two ,
mostly .
Watch you dont open your hand severely though .

Oldrider said:

Click to expand...

If you do get it running, the tea strainer mesh over the bellmouth has got to be restrictive.

A ride downtown to the "Salvos" café for a coffee and pie well worth it.
An old Triumph mate had an idea!!!
"Strap a plank across the barrel using the head bolts (with care) and rock her off"




Barrel and pistons look ok so far .
The problem ......crank case gasket glued both sides and... excess Loctite used by the clueless "mechanic" to bed crank case studs, had flowed up into the barrel hold down holes and hardened, "locking" barrel to crank case.
Thanks to all for the other suggestions.
I didn't need to use heat or fire her up with Nitro down the plug holes.(suggester will remain nameless )

Pistons look interesting but that's for later (pics tomorrow)
Cheers
O/R

That thing looks brand new in there.

I hardly get the pleasure of disassembling a clean engine...

Oldrider said:

A ride downtown to the "Salvos" café for a coffee and pie well worth it.
An old Triumph mate had an idea!!!
"Strap a plank across the barrel using the head bolts (with care) and rock her off"

Barrel and pistons look ok so far .
The problem ......crank case gasket glued both sides and... excess Loctite used by the clueless "mechanic" to bed crank case studs, had flowed up into the barrel hold down holes and hardened, "locking" barrel to crank case.
Thanks to all for the other suggestions.
I didn't need to use heat or fire her up with Nitro down the plug holes.(suggester will remain nameless )

Pistons look interesting but that's for later (pics tomorrow)
Cheers
O/R

Click to expand...

Good idea!

And yes, best to keep Matt nameless...!

Who????
I agree clean is good
pics already posted are after clean up of piston top etc.
Not so good before



Bores rings and pistons looked ok

But so much oil dragged into top of piston, I could see the oil sitting there after a good run.
Guides, I was told , were ok.
Off to get bits micd up again and a hone at least.

Cheers

Very fortunate.

Thats the problem , With These NORTON Blokes : Theyre Scared of NITRO ! .

Just Kidding on the NITRO Chaps . Abstract / cartoon concept , there anyway .

Are You Going to Tell Us the Valve Head Diameters /
Please ! .