BlownCorona Posted July 17, 2013 Author Share Posted July 17, 2013 can you use that stuff on an inlet manifold? though idealy i would like to have it sealing normaly, since the manifold may come off in the future, throughout tuning and modification. Quote Link to comment Share on other sites More sharing options...
Benno Posted July 17, 2013 Share Posted July 17, 2013 The mechanic I yarned to when I was having issues with an air leak recommended it, just a very thin smear. Quote Link to comment Share on other sites More sharing options...
Rookie Posted July 17, 2013 Share Posted July 17, 2013 If it is as he described it won't do any good. Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted July 17, 2013 Author Share Posted July 17, 2013 yes i think having it machined is really the best option, esspessialy when vac leaks are in the equation Quote Link to comment Share on other sites More sharing options...
Muncie Posted July 21, 2013 Share Posted July 21, 2013 If your skilled with a file and take your time you can get a straight edge on the flange then file down the high spots. some engineers blue makes the job quite easy. Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted July 21, 2013 Author Share Posted July 21, 2013 i have done an aeronautical engineering course in which we had to file a bucking bar perfectly flat, used engineering blue and all that. im capable of doing it, that said, i do not own the tools required, and i dont have enough free time to do so, so ill have to get them machined. (im aiming to have this finished and wofd so i can take it to the hanmer meet) ive been chasing vac leaks all day, and its getting a bit better, also hooked up the manual choke and accelerator and took it slowly around the block today. i then welded in the fitting for boosted brakes and this seems to work pretty well. it does affect the RPM when the breaks are pressed. this may be a normal side effect im not sure yet. breaks feel good though. does anyone have a good way to find vac leaks when the manifold is off? so far ive been sealing the runner with my hand and blowing into it and hearing for the leaks. and using ether when the engine is running to hear for when it gets sucked in, but id prefer something a bit more precise. Quote Link to comment Share on other sites More sharing options...
peteretep Posted July 21, 2013 Share Posted July 21, 2013 blowing into it with some soapy water around the joins should find the leaks pretty well if you really want to finish the mating surface up flat then you can get a bit of glass with some sandpaper to get a flat surface, might take you many hours if its more than a mm or 2 out though haha Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted July 21, 2013 Author Share Posted July 21, 2013 thats a good idea, Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted July 21, 2013 Author Share Posted July 21, 2013 the soap thing that is Quote Link to comment Share on other sites More sharing options...
NaN Posted August 1, 2013 Share Posted August 1, 2013 NaN Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted August 1, 2013 Author Share Posted August 1, 2013 yeah its most certainly vac leaks that cause this coughing problem, i welding a shit ton of leaks up in the welds, and used RTV to seat the flange to test the theory, purs nicely and ran very well, only coughed a bit on 4th cyl. however, the RTV got all kinds of fucked up real fast. the manifold is currently with rob - 4age_addict - who is very kindly machining them flat again, and i picked up a new gasket today cause the manifolds have been on and off so many times. also thinking about smearing a thin layer of kneedit over the welds, to both seal any last leaks and to smooth out the joins in the vein of car filler. Quote Link to comment Share on other sites More sharing options...
NaN Posted August 1, 2013 Share Posted August 1, 2013 NaN Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted August 1, 2013 Author Share Posted August 1, 2013 haha, it does not look pretty. it probably belongs on the fabrication wtf thread. but it works, and when i paint it lime green, it tends to make the ugly welds dissapear. through sheer distraction haha. Quote Link to comment Share on other sites More sharing options...
Muncie Posted August 1, 2013 Share Posted August 1, 2013 to chase leaks i get a can of crc easy start and chuck on the 5.56 straw attachment start motor up and squirt at your flanges and welds if you find a leak the rpms will pick up a bit you'll hear it.... best do it before the exhaust heats up to much for a non crossflow. 1 Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted August 1, 2013 Author Share Posted August 1, 2013 yeah man, got that all sorted, i think it was in this thread that soapy water works an absolute treat. seal up the port end, put soapy water on all the joins, and blow into the carb end, bubbles and and makes noise on all leaks. you can all assume that my weird running/vac leak problems are cured with welding and Robs machining help, and i will surely be back with you shortly with the next problem! Quote Link to comment Share on other sites More sharing options...
NaN Posted August 1, 2013 Share Posted August 1, 2013 NaN Quote Link to comment Share on other sites More sharing options...
BlownCorona Posted August 6, 2013 Author Share Posted August 6, 2013 so when i say cured, i mean bane of my existance. still havig trouble geting the flanges to seal on the corners that done have a bolt hole. any ideas? its starting to look bad for driving this to hanmer Quote Link to comment Share on other sites More sharing options...
Rookie Posted August 6, 2013 Share Posted August 6, 2013 how thick are they? Quote Link to comment Share on other sites More sharing options...
Beaver Posted August 6, 2013 Share Posted August 6, 2013 How are you checking they are sealing/not sealing once on the car? Just blowing down the runners with soapy water around the joints? (reason asking is I need to do the same) Quote Link to comment Share on other sites More sharing options...
Steelies Posted August 6, 2013 Share Posted August 6, 2013 phew, glad you've moved on from RTV, in my experience fuel turns it into some gnarly slime goo shit! have you tried getting the motor/gaskets nice and hot and giving the manifold bolts nearest the leaks another little tweak up? cautiously Quote Link to comment Share on other sites More sharing options...
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