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#620476 - 10/29/09 10:56 PM
Re: oil in my cylinder
[Re: doughairfield]
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Jedi Warrior
Registered: 01/16/09
Posts: 765
Loc: Charlotte, NC
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I should have noticed earlier, but don't rotate the crank until you have locke the liners down. If they move, they will break the seal at the bottom where they interface with the block and will have to be pulled and re-sealed.
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LBC's previously owned: 2 '59 TR3As, 1 Driven, 1 raced in '64 '61 & '68 Corvairs, both 4 carb (non LBC) Sunbeam Alpine (former wife loved it) Volvo 122S (non LBC) '46 MGTC 0442 '62 Sprite (racer) Currently owned: '62 TR4 (CT5586 L) bought 1990, stored until 2008, now undergoing refurbish for a driver.
Jim Browne
A legend in my spare time. I started with nothing and still have most of it.
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#621697 - 11/03/09 08:23 AM
Re: oil in my cylinder
[Re: doughairfield]
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Senior Member
Registered: 07/03/09
Posts: 92
Loc: Cary NC, USA
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Got the report back for the head. Pressure check was good and no cracks. The valve guides need to be replaced along with the springs, mine takes the triple spring setup. Of course I have a few questions:
Is it worth it to get the manganese-bronze type valve guide or the stock valve guides?
The machine shop said there were o-ring seals on the valves, is that the same as the part called the "Collar?"
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Doug Hairfield ------------------------------- 1964 Triumph TR4
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#621760 - 11/03/09 11:43 AM
Re: oil in my cylinder
[Re: doughairfield]
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Yoda
Registered: 08/24/03
Posts: 5952
Loc: Sunny So California
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Is it worth it to get the manganese-bronze type valve guide or the stock valve guides? IMO, no. In theory they last longer, but in practice they must be reamed oversize because the bronze expands faster with heat than the cast iron head does (causing them to close up when they get hot). The machine shop said there were o-ring seals on the valves, is that the same as the part called the "Collar?" No, I don't believe so. Those would be aftermarket seals that someone has added, presumably only on the intake guides (in an attempt to reduce oil burning). The "collars" go on the exhaust valves only, and provide a stepped seat for the inner valve springs (which are shorter than the outside springs). The added seals can be useful for racing (where longevity is not an issue), or as a band-aid on engines that are already badly worn (BTDT). But in general I feel they are a poor idea, as they keep too much oil away from the stems & guides, which causes them to wear quicker. The factory setup will easily last 100,000 miles, by which time it will need a ring job, too.
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Randall 59 TR3A TS39781LO (now totaled  ) 56 TR3 TS13571L current project 71 Stag LE1473L waiting engine rebuild 71 Stag LE2013LBW waiting gearbox rebuild
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#623383 - 11/08/09 09:33 PM
Re: oil in my cylinder
[Re: AltaKnight]
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Senior Member
Registered: 07/03/09
Posts: 92
Loc: Cary NC, USA
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yes, I"m actually in the process of getting the engine completely taken apart. I agree that with all that oil in there the head may not be the only culprit. I've got the engine on the stand but I'm having a heck of a time getting the screws started on the sealing block in the front and getting the cover off to expose the timing gears. I've got all the bolts out but it's like the cover is glued on.
I'm going to just lift the crank and pistons out through the bottom since I have the block upside down and take the block, crank and pistons to the machine shop this week. I'll let you know how it goes.
_________________________
Doug Hairfield ------------------------------- 1964 Triumph TR4
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#623447 - 11/09/09 08:49 AM
Re: oil in my cylinder
[Re: doughairfield]
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Silver Member
Luke Skywalker
Registered: 01/01/06
Posts: 1696
Loc: Katy, Texas
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Doug - don't forget that one nyloc nut that runs right through the center of the cover - I pulled all the peripheral bolts and had the same issue until I realized I hadn't pulled that center nut off.
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Randy 64 TR4 runner 59 TR3A project
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#624206 - 11/12/09 08:04 AM
Re: oil in my cylinder
[Re: TR4nut]
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Senior Member
Registered: 07/03/09
Posts: 92
Loc: Cary NC, USA
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I finally got it off, they used plenty of RTV to secure it in it's previous life.
Got the crank and pistons out last night too. I think i'm going to have to replace the cylinder liners. Once I got the crank and pistons out, I was able to see a big chunk of the line for #2 missing where the liner extends past where it's pressed into the block.
This is turning into a total motor rebuild.
_________________________
Doug Hairfield ------------------------------- 1964 Triumph TR4
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#624289 - 11/12/09 02:01 PM
Re: oil in my cylinder
[Re: doughairfield]
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Jedi Warrior
Registered: 01/16/09
Posts: 765
Loc: Charlotte, NC
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Unless you found that chunk or pieces of it in the pan, then PO probably installed it that way. Should be ok to continue to use it as long as bore is not tapered or scarred as there is no load on the liner at this point. Others tell me if I'm wrong.
_________________________
LBC's previously owned: 2 '59 TR3As, 1 Driven, 1 raced in '64 '61 & '68 Corvairs, both 4 carb (non LBC) Sunbeam Alpine (former wife loved it) Volvo 122S (non LBC) '46 MGTC 0442 '62 Sprite (racer) Currently owned: '62 TR4 (CT5586 L) bought 1990, stored until 2008, now undergoing refurbish for a driver.
Jim Browne
A legend in my spare time. I started with nothing and still have most of it.
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#625603 - 11/17/09 11:44 PM
Re: oil in my cylinder
[Re: TOC]
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Freshman Member
Registered: 10/29/09
Posts: 14
Loc: So Cal
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also if you use it chamfer the sharp inner edge and smooth it out to avoid any future piston scarring or cracking.
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1974 Tr6 under resto 1962 Tr4 Surrey CT7080LO
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#625720 - 11/18/09 02:48 PM
Re: oil in my cylinder
[Re: Brosky]
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Senior Member
Registered: 07/03/09
Posts: 92
Loc: Cary NC, USA
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I'll check both tonight when I get home and send a pic of the piston. Thanks for the insight.
_________________________
Doug Hairfield ------------------------------- 1964 Triumph TR4
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