JohnD Posted March 4, 2019 Share Posted March 4, 2019 4 hours ago, GT6MK3 said: Day 61. That soapy bubble is air leaking out of what should be an airtight manifold. Drat. Is this a weld that is leaking, or a seal? I've found that it's really difficult to affect a seal in a MiG weld. I've had to grind out and reweld a fabrication several times to get it tight. I'm told, can't say, that a TiG seals better and brazing is best! John Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 5, 2019 Author Share Posted March 5, 2019 Day 64. . Visiting the happy place again. Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 5, 2019 Author Share Posted March 5, 2019 21 hours ago, JohnD said: Is this a weld that is leaking, or a seal? I've found that it's really difficult to affect a seal in a MiG weld. I've had to grind out and reweld a fabrication several times to get it tight. I'm told, can't say, that a TiG seals better and brazing is best! John It's leaking out from under an adapter plate. 2 problems - I made it out of 3mm sheet rather than 6, and there is a slight raised lip on the edge of the original flange. New plate made from 6mm stock tonight at the Alan's house of big boys tools, and a relief filed for the lip. Fingers crossed it hold air when tested in 24 hours. Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 6, 2019 Author Share Posted March 6, 2019 Day 65. The smug, self satisfied smile of the engine builder who's pressure test hasn't dipped in over 5 minutes. 3 minutes later there was a "Pop", followed by a "Ppppffffffffftttttttttt" as the seal broke, and all the air leaked out. Less happy face. Link to comment Share on other sites More sharing options...
Nick Jones Posted March 6, 2019 Share Posted March 6, 2019 How much pressure?! 300 whats? and how much might the seal really see in normal service...... Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 6, 2019 Author Share Posted March 6, 2019 Just over 300mmHg, or about 6 psi. The seal in question is an adapter plate the reed valve for the carb mounts onto - it wont ruin the engine if it leaks, but it will cause a lumpy idle, and has the potential to cause runaway acceleration. Good news it the cylinder itself and the gearbox are sealed. Need to look at a gasket rather than just goop. Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 7, 2019 Author Share Posted March 7, 2019 Day 66. Late night session cleaning, filing and recleaning. New gasket, new goop, and a temp plate on top. Fingers and toes crossed. Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 8, 2019 Author Share Posted March 8, 2019 Day 67. Battle continues. Link to comment Share on other sites More sharing options...
Nick Jones Posted March 8, 2019 Share Posted March 8, 2019 1 hour ago, GT6MK3 said: Battle continues Still leaks or moved on to next challenge? Hope the latter, but if still leaking, any scope to get an O-ring in there? Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 9, 2019 Author Share Posted March 9, 2019 Still fighting it. O ring would be tricky - very odd shape, tight clearances. Epoxied the edges last night, will see how it is in the morning. Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 9, 2019 Author Share Posted March 9, 2019 Day 68. Goofing off at the drop zone congratulating one of the guys who just got his skydiving license. Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 10, 2019 Author Share Posted March 10, 2019 Day 69. Finally sealed. Link to comment Share on other sites More sharing options...
Nick Jones Posted March 10, 2019 Share Posted March 10, 2019 19 minutes ago, GT6MK3 said: Finally sealed. Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 11, 2019 Author Share Posted March 11, 2019 Day 70. Online ordering parts to replace the ones I just broke... Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 12, 2019 Author Share Posted March 12, 2019 Day 71. Should be: Billing. Is: Spine bashing. (And watching Finest Hour.) Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 13, 2019 Author Share Posted March 13, 2019 Day 72. Give me a lever long enough and a fulcrum on which to place it Link to comment Share on other sites More sharing options...
JohnD Posted March 13, 2019 Share Posted March 13, 2019 Your lighting, and the semi-scientific subject, makes me think of: An Experiment on a Bird in the Air Pump. by Joseph Wright of Derby. All you need is a family with varying degrees of interest around you, and a Dr.Who (Tom Baker style) costume, and you have it! John Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 14, 2019 Author Share Posted March 14, 2019 Day 73. There is simply no comfortable way to do some jobs. Link to comment Share on other sites More sharing options...
Hamish Posted March 14, 2019 Share Posted March 14, 2019 On 3/14/2019 at 10:33 PM, GT6MK3 said: Day 73. There is simply no comfortable way to do some jobs. Complete with Snap-on pillow respect Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 15, 2019 Author Share Posted March 15, 2019 Day 74. Many places I’d rather be than here on a Friday night. Link to comment Share on other sites More sharing options...
Nick Jones Posted March 15, 2019 Share Posted March 15, 2019 Back in the (high tech) broom cupboard Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 16, 2019 Author Share Posted March 16, 2019 Day 75. If it’s going to go, it better stop. Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 17, 2019 Author Share Posted March 17, 2019 Day 76. The magic moment when the hydraulic hose that’s fought back for two hours finally appears at the top of the path you’re feeding it through. Link to comment Share on other sites More sharing options...
Hamish Posted March 17, 2019 Share Posted March 17, 2019 And here was I expecting you to be “dropping” in on Albert park!! but no you are back to the core values in life Link to comment Share on other sites More sharing options...
GT6MK3 Posted March 18, 2019 Author Share Posted March 18, 2019 Day 77. Not a lot less I want to hear on a phone call at 6 at night than “There’s a beeping noise coming from our servers”. Exit garage, run to client office.:. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now