Part Problems... | Triumph Spitfire Restoration - Part 109
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- Опубліковано 16 вер 2024
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Steve, I forget how you decided what thickness thrust washers to use when you dropped in the crank. That would be one, and probably the best, way to move the crank sprocket aft. As for reusing the old crank sprocket, that is a good way to quickly wear out your new chain and eventually the cam sprocket. -Andy
Thanks Andy!
So the thickness was determined by taking the endfloat of the crank prior to disassembly and then measuring the thickness of the old thrust washers. This formula allows you to determine crank wear and then order the properly sized thrust washers to gain that all so desired 0.005 endfloat.
Rotate the cam gear see if that changes anything it’ll confirm one thing for sure
Steve, great video. I have rebuilt half a dozen Mk 1&2 Spitfire engines myself and always replaced the chain tensioner, usually the chain but never needed to replace either sprocket. Your original lower sprocket looks better than the new replacement, so I would reuse it. Keep up the good work, Robert, in Australia.
Thanks Robert! I think that will be the route that I take. Thanks for the input!
Put the chain on either sprocket, how much side clearance does it have? Most likely it's more then your misalignment, though that shouldn't be a deciding factor if it's at the limit. I wouldn't want the misalignment to be much more then half to 3/4 of the chains side clearance. Any bearing supply houses around, check them for shims? Transmission shops may have something you can use..
Contact a local machinist and discuss removing the amount the gear is forward from the area that sets to the crank. Also discuss the concern with the gear teeth.
Hey Steve, did you check to see where your crank was seated? You may be sitting all the way forward in your end float on the crank. I don’t remember the specs vs how much you are off…just a thought. Also, make sure you check your cam float with the front plate torqued all the way around as it changes things.
That was my first though so I ensured that both the cam and crank were set all the way back and that is only a few thou. The crank sprocket so off by a few hundreds
You will encounter crank crank and cam end float but being off that much I say it is defiantly the crank gear. Hope it be rectified threw finding the correct gear. Got to love these out of spec parts that they sell for even more than they where 5 years ago.
Yeah crank and cam endfloat is one thing, those are in the thousands not hundreds like this thi
Rotate the cam gear see if that changes anything it’ll confirm one thing for sure
One thing to consider on the smaller camp gear is, where was it made because a lot of those gears were made in India and they are not good at all so find out where it was made in order one from the UK
Sadly this is the same part sold by multiple suppliers…. The cam gear has some small variances that measure no more than a few thou But the crank sprocket is off but a few hundreds
Sucks for sure. I did the duplex chain upgrade on mine and everything fit perfectly using the old shims. Out of those 2 gears I'd definately go with the old one. Also if your cam retainer is too thick you can take a little off with sandpaper.
Thanks Aaron, I am actually slowly working on shaving it down some. It is certainly to thick, but honestly its the original, and original cam so it worked before....
You need to visit a machinist. It would be a simple job to sort out.
Moss and Rimmer brothers were bought by a group of. By from English parts company
Yeah they were bought by some private equity firm…
Go with the old or search for parts in the UK . Yes more expensive and tax plus VAT one and done
@@frankmgallo I beg to differ from you about the VAT I don’t know what you’re doing to be charged that tax😳 but literally every time I’ve ordered parts from the UK I’ve never been charged with a VAT!
@@RobertFerrell-t7t
Well I order a carpet set from John Skinner and it was VAT taxed and held up in customs paying $256 to release it. I don’t know either
They don’t give a shit