converted_to_datsun Posted September 15, 2012 Report Share Posted September 15, 2012 Anyone ever de smog an l20b exhaust Manifold? Those little fittings are stubborn and I can't seem to get them off for anything Quote Link to comment
converted_to_datsun Posted September 15, 2012 Author Report Share Posted September 15, 2012 See that crimped tube? Taht's what I'm talking about. I think it ust to hook to the smog pump stuff Quote Link to comment
Grahem Posted September 15, 2012 Report Share Posted September 15, 2012 i welded them shut and the heat from welding loosened them up so i spun them out and put brass plugs in it looks much cleaner Quote Link to comment
converted_to_datsun Posted September 15, 2012 Author Report Share Posted September 15, 2012 Well i haven't tried heat yet.i was afraid of catcking them on fire haha I've soaked them in every kind or penitrating crap with no luck yet. I can't figure out what size wrench fits either. I tried metric and stanard Quote Link to comment
Tristin Posted September 15, 2012 Report Share Posted September 15, 2012 I can't figure out what size wrench fits either. I tried metric and stanard Maybe you should try a standard size wrench... 1 Quote Link to comment
converted_to_datsun Posted September 15, 2012 Author Report Share Posted September 15, 2012 tried standard too. my mechanic buddy tried every size he had. Almost ready to use a pipe wrench haha Quote Link to comment
Boaty Posted September 15, 2012 Report Share Posted September 15, 2012 Actually, that's exactly what I would use - a pipe wrench. The hardware store probably has exhaust plugs as well. Take one down and match it up, and screw them in. They can be buggers, that's for sure. Quote Link to comment
converted_to_datsun Posted September 15, 2012 Author Report Share Posted September 15, 2012 That's exactly what i plan on doing and after that I'll work on deleting the rest of the vacume stuff from the smog equipment. Have to wait till I get payed friday tho.... broke again. So for now i'll give it a bath and work on cleaning up the motor a bit Quote Link to comment
Boaty Posted September 15, 2012 Report Share Posted September 15, 2012 That's what I like to hear. I hate working on dirty engines. Mine is almost spic-n-span, and my L20B was rarely ever greasy. I had a nasty leak on the front inspection plate, and a leaky rear main seal (getting fixed next couple of days so I can the L20B in my truck!)... nothing is worse than getting greasy on something that should be nice and oil-less! Quote Link to comment
Tristin Posted September 16, 2012 Report Share Posted September 16, 2012 That's exactly what i plan on doing and after that I'll work on deleting the rest of the vacume stuff from the smog equipment. Have to wait till I get payed friday tho.... broke again. So for now i'll give it a bath and work on cleaning up the motor a bit You and I are on the same level. Poor, but still trying to do work... Engine bay clean up is all I can do haha. Quote Link to comment
converted_to_datsun Posted September 16, 2012 Author Report Share Posted September 16, 2012 Haha glad to hear i'm not the only one working with a low budget. That's what I like about ratsun, we love our datsuns but nobody is down on you for makin due with what you have. My 620 may be a rusty terd but it's a datsun haha Quote Link to comment
converted_to_datsun Posted September 16, 2012 Author Report Share Posted September 16, 2012 Looks like what I'm lookin for. Any clue on the size and thread count? I wanna do some lookin before I pull one. Quote Link to comment
datzenmike Posted September 16, 2012 Report Share Posted September 16, 2012 I bought those years ago. Took one of the air injectors in to a hardware store and matched the threads. Pretty sure it's a metric pipe thread.... something that might be hard to find in the states. If you want to heat it up and try to loosen, just run the motor. I think you will find the injectors very soft metal. One of mine squashed trying to get it off. They are a bitch to get a socket on with the carb in place. Also the injector pipe is quite long and reaches down into the port. Quote Link to comment
converted_to_datsun Posted September 16, 2012 Author Report Share Posted September 16, 2012 I guess if it comes down to it I can find the right size metric bolt and shorten it to fit. I'll make it work, I've tried to get them off after the engine was hot before but they're pretty stuck but I'm stubborn so I'll find a way Quote Link to comment
datzenmike Posted September 16, 2012 Report Share Posted September 16, 2012 Bolt and pipe threads are different I think. Worth a try. Quote Link to comment
converted_to_datsun Posted September 16, 2012 Author Report Share Posted September 16, 2012 I know a hardware store where I can pretty much find any thread count I want. Haven't been disappointed yet Quote Link to comment
dscottdatsun Posted September 16, 2012 Report Share Posted September 16, 2012 Your looking for BSPT (British Standard Pipe Tapered). Try a local hydraulic hose maker. The bloody difference between American and British Pipe is one thread per inch. If all else fails a brass pipe plug will conform to fit. Quote Link to comment
jesusno2 Posted September 16, 2012 Report Share Posted September 16, 2012 cut them off and weld up the hole Quote Link to comment
datzenmike Posted September 17, 2012 Report Share Posted September 17, 2012 cut them off and weld up the hole The problem with this is the 3-4" of pipe sticking down into the exhaust ports. Might as well remove any and all obstructions. Quote Link to comment
converted_to_datsun Posted September 17, 2012 Author Report Share Posted September 17, 2012 Sounds like maybe not as simple as i hoped it would be Quote Link to comment
lonnie152 Posted September 20, 2012 Report Share Posted September 20, 2012 thanks for discussion on this. if possible, any pics you have or can post would be a great help since I am now in process of doing same. 1 Quote Link to comment
converted_to_datsun Posted September 20, 2012 Author Report Share Posted September 20, 2012 I will probably try to work on it tomorrow since I have the day off work so I'll take some pics of what I end up doing Quote Link to comment
converted_to_datsun Posted September 21, 2012 Author Report Share Posted September 21, 2012 Here's the one I decided to work on first. Kinda dark but it's at the top of the pic Here's the tools I used and a can of freeze off. And finally here's the fitting! Took forever then I put it back in to drive to the hardware store Gonna post more when I get back from the hardware store Quote Link to comment
datzenmike Posted September 21, 2012 Report Share Posted September 21, 2012 Still laying tools over the battery eh? 1 Quote Link to comment
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