Rebuilding My T140V Engine - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 86 (permalink) Old 04-23-2017, 05:20 PM Thread Starter
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Rebuilding My T140V Engine

Howdy Folks,
Been tearing down my T140V engine that I have in my 70 Bonneville. The barrel and head are at the machine shop (Raber's Parts Mart) in San Jose, CA. They told me the head needs new valves, guides, springs and seats. They said the cylinders need to be bored .040 over. Cost? = $1450.00. Ouch!!! Oh well, it has to be done and I don't know anybody better that can do it.

While the machine shop is busy with the head and cylinders I'm proceeding to split the cases and pull the crankshaft. Just about ready to pull the engine out of the frame but still need to get that nut and gear of the crankshaft on the timing side. Also noticed in the manual that the gears on the camshafts should have threaded holes in them to screw the puller bolts into. My gears don't have any holes in them at all. Hmmm???? Hopefully they'll pull off by hand!???

I also have my tank and fenders over at the painters and should be getting those back any day now. At first he said that he'd have them finished be April 7th and I made the mistake of telling him I wasn't in a hurry. I thought maybe the following weak he'd have them done but didn't hear from him. He finally called me last Wednesday and left me a message saying they've been primed and the red is painted. He thought the scallops would be painted the next day but it was depending on how many insurance jobs he had coming in. So I guess he's doing them in his spare time. As you can see I won't be ready for them for quite a while but just kind of itching to see what they look like.

When I took my primary cover off I notice that the primary chain was real lose. After a closer inspection I noticed that the new tensioner I put on about a 1000 miles ago was broken. The two curved ends on the forward end of it snapped off. What the heck would cause that? I check the chain for wear when I installed it so didn't have to put a lot of stress on the tensioner to get the right tension on the chain. Hopefully it was just a defective tensioner and I wasn't doing something else wrong.
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post #2 of 86 (permalink) Old 04-23-2017, 09:21 PM Thread Starter
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Okay, I got three of the four gears off and it was not easy getting the intake gear off. The exhaust gear and the idler gear came off by hand but that darn intake gear was a bugger. It looks like the intake and exhaust gears have threads around the outside of the center piece. (I wonder what kind of a puller works with that situation?) Even if I did have the correct puller it wouldn't have work without a lot of work because the previous owner of the engine screwed up the threads. Anyway, I ended up making my two bolt puller work by grabbing the under side of the gear from the outside with two nuts screwed onto some all-thread. I had to grind down one side of the nut to fit between the case and the gear.

Hey, it was hokier as hell but it worked.
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post #3 of 86 (permalink) Old 04-24-2017, 04:38 AM
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I believe those gears with the threads on the centre boss were used on the earlier 650 twins with the "dry " frame" up to 1970 - (maybe even later) - there is a special puller - but you dont need it now anyway

- it ain't hokie if it works !
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post #4 of 86 (permalink) Old 04-24-2017, 10:58 AM
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Hmmmmmm... I heard Raber's was CLOSING their shop to concentrate on sales?

Glad they're taking care of you.

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post #5 of 86 (permalink) Old 04-24-2017, 03:01 PM Thread Starter
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Quote:
GrandPaulZ: Hmmmmmm... I heard Raber's was CLOSING their shop to concentrate on sales?
I think they just stopped servicing bikes. I don't think you can take your bike in there anymore to have new tires put on or have the oil changed and that sort of thing. The machine shop is still open in addition to selling parts but think that's about it.
They make it hard to do business with them because they have a terrible website and they only take phone calls on Tuesday and Friday between 11 and 6:00 and on Saturday 10 to 5:00. They're closed on Sunday and Monday. On top of that they are not cheap!

I want to support them and sometimes I don't mind paying a little more hoping it will help keep their doors open....Gary
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post #6 of 86 (permalink) Old 04-24-2017, 03:25 PM Thread Starter
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Quote:
WOL: I believe those gears with the threads on the centre boss were used on the earlier 650 twins with the "dry " frame" up to 1970 - (maybe even later) - there is a special puller - but you dont need it now anyway

Hi WOL,
Although this is a 76 T140V engine, when I got it, it had 64 outer trans cover on it and an older timing cover. I've since switched them out. So you're probably right and I wouldn't be surprised if the timing gears aren't original. This engine came new with left hand shift and one of the PO's converted it back to a right hand shift. With the old 64 outer trans cover there wasn't a filler hole in the cover like the newer models so I couldn't fill the transmission very easily. I had to fill the trany through the clutch cable entrance and would have to take the cover off to replace the cable.

Now off to see if I can get that gear off the crankshaft with another hokey gear puller of some sort. If not I guess I'll be buying one - maybe at Raber's if it's not to far out of reach.
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post #7 of 86 (permalink) Old 04-25-2017, 04:37 AM
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that crankshaft gear is very close to the casing not much room to get a hokey puller in there -they tend to be a good fit and rarely slide off without "encouragement"
the correct puller does the job with ease - but not cheap -- wasnt cheap ## years ago when i bought mine
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post #8 of 86 (permalink) Old 04-27-2017, 01:13 AM Thread Starter
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Originally Posted by wol View Post
that crankshaft gear is very close to the casing not much room to get a hokey puller in there -they tend to be a good fit and rarely slide off without "encouragement"
the correct puller does the job with ease - but not cheap -- wasnt cheap ## years ago when i bought mine
After looking at the gear again and contemplating what a hassle it would be to try and make a puller I called Raber's and ordered a new puller today.

While I'm waiting for the gear to show up I pulled the engine today AND, I got my tank and fenders back from the painter today. The color turned out darker than I thought it would. Oh well, I'm still pretty happy with it and glad to have the painting finally done. Hopefully it'll look better in the sunlight (raining all day here).
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post #9 of 86 (permalink) Old 04-27-2017, 09:51 AM
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Beautiful paint job!

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post #10 of 86 (permalink) Old 04-27-2017, 03:56 PM Thread Starter
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Thanks GPZ, but I put the tank out in the sunlight a little while ago and the paint sort of looks brownish burgundy metallic. The more I look at it the less I like it. I think I may have it repainted. Dad burn it!!!
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