Slappy707 Posted April 11, 2015 Report Share Posted April 11, 2015 Been out of the datsun game for awhile but glad to finally be back. Just picked up this 1969 521 with a l20 swap. Hasn't ran in about a year so that'll be the first step. According to the previous it had a fuel issue. I'll also be starting a build thread soon hopefully At work I'll upload pics when I get home 1 Quote Link to comment
Slappy707 Posted April 11, 2015 Author Report Share Posted April 11, 2015 http://i1301.photobucket.com/albums/ag106/slappy707/Mobile%20Uploads/20150409_193056_zpsy5ad7uok.jpg 1 Quote Link to comment
DanielC Posted April 11, 2015 Report Share Posted April 11, 2015 Step one, make sure the brakes work. Step two, just drop the fuel tank, clean it out. Take it to a good radiator shop, if necessary. Stop by an auto parts store on the way home, buy some 1/4 low pressure fuel hose, replace all the rubber hoses from the fuel tank to the fuel pump.7 1 Quote Link to comment
spdcrazy Posted April 11, 2015 Report Share Posted April 11, 2015 Awesome! What transmission is behind it? What is your direction for building? 1 Quote Link to comment
Slappy707 Posted April 11, 2015 Author Report Share Posted April 11, 2015 thank for helping with the upload. Already replaced fuel pump and the hoses yesterday. still need to replace the neck hose tho. Going to flush radiator as well or just replace with aluminum like i had on my 510 awhile back. I haven't had a chance to look at the brakes so im not sure what condition they will be in, im sure it wont be to good tho. Its getting fuel now tho and its wanting to turn over but hasn't yet. ran out of daylight yesterday so i be working on it today and ill post some more pictures. Also it still has the 4 speed. And i'm planning on just keeping the patina look just clear coating it and fixing up interior. Body is actually really straight it has no bondo and only a few small dents surprisingly. 1 Quote Link to comment
laotsu Posted April 11, 2015 Report Share Posted April 11, 2015 lets see the interior and under the hood 1 Quote Link to comment
MicroMachinery Posted April 11, 2015 Report Share Posted April 11, 2015 Looks great! 1 Quote Link to comment
Slappy707 Posted April 12, 2015 Author Report Share Posted April 12, 2015 Sorry guys forgot to take pics but I did get her running for a few seconds for the first time in a year tho. Carb was bad and was just flooding her. So time to rebuild it or switch to a single side draft. I'll post engine and interior pics tomorow 1 Quote Link to comment
mrbigtanker Posted April 12, 2015 Report Share Posted April 12, 2015 Very nice start,looks like you need the stainless around the front grill and hood, if you don't have it, it should not be hard to fine. :thumbup: :thumbup: 1 Quote Link to comment
Slappy707 Posted April 13, 2015 Author Report Share Posted April 13, 2015 Sorry for the multiple posts. Phones copy and paste wasn't wanting to let me paste it all in one 1 Quote Link to comment
banzai510(hainz) Posted April 13, 2015 Report Share Posted April 13, 2015 And i'm planning on just keeping the patina look???????? I thought the same thing!!!!!!!!!! fuel dilevery? pull output of pump hose crank and see if gas shoots out. If yes then look at carb squirting gas fromm accell pump then look at spark. 15min job. assume its electric as I dont see a manual fuel pump on there. see those funky red wires gon to the distrubutor??? Where the stock wiring at? The blkwht wire ? I would just run it thrn see what it does before taking all this stuff apart. 1 year isnt that long not running 1 Quote Link to comment
Slappy707 Posted April 13, 2015 Author Report Share Posted April 13, 2015 Yea I actually got it running the other night for a few seconds. Disconnected the fuel line because it just kept flooding really bad. So let her air out and just ran her with the fuel left in the carb and she ran great while the fuel lasted. Took carb apart and I'm pretty sure I found the issue. So just waiting a the rebuild kit now. And when I got it there was a Manuel pump installed and the old electric was still hooked up not sure what was going on so took off both and installed new electric pump. Gonna throw on a pressure regulator just to be safe tho Carb did have a pretty good amount of dirt tho so ill probably be cleaning out the tank soon too 1 Quote Link to comment
DanielC Posted April 13, 2015 Report Share Posted April 13, 2015 The mechanical fuel pump put out about 2 to 3 PSI. most electric fuel pumps put out more, and the higher pressure overpowers the float, and the carb bowl floods. The stock mechanical pump has a spring, that pushes the fuel pump diaphragm. When the float bowl in the carb is full, the pressure in the fuel line to the carb holds the diaphragm down, and the fuel pump does not pump fuel, that the carb does not need. You will have fewer problems with a mechanical fuel pump back on your engine. 1 Quote Link to comment
banzai510(hainz) Posted April 13, 2015 Report Share Posted April 13, 2015 You will have fewer problems with a mechanical fuel pump back on your engine. I would go with this myself. Maybe thats why it was flooding out. Also ck the fuel liter if one installed You can detect how bad a tank is by the filter as 521s the fuel hose is in the wheelwell and dirt gets down the hose and water with then rust the tank and gets in the idle jet. As for the rebuilt kit I would adjust the mixture first before tearing in to a carb Took carb apart and I'm pretty sure I found the issue. ??????????the suspense is killing me Patina is good but paiting back to the org blu would look good also 1 Quote Link to comment
ggzilla Posted April 13, 2015 Report Share Posted April 13, 2015 Carb was flooding. Which is usually not solved by a carb kit. And not caused by dirt inside the carb. Most common cause is fuel pressure too high. Other causes include float level too high, float pin not correctly put together (missing spacer?), or bad needle/seat assembly. 1 Quote Link to comment
Slappy707 Posted April 14, 2015 Author Report Share Posted April 14, 2015 One of the diaphragm in the carb actually had a sliver of metal from a screw I think stuck which was holding the diaphragm open. I think it was the accelerator pump. Honestly don't know a whole lot about carbs but I figured either way it would need to be gone through. Gonna borrow a friend's pressure regulator see if that helps too if not I'll just switch back to Manuel like you guys recomended. Thanks for the help. Also I've got a few extra parts including but not limited to a gauge cluster and grill if anyone's interested in trading 1 Quote Link to comment
ggzilla Posted April 14, 2015 Report Share Posted April 14, 2015 A carb kit causes many problems. Search here for experiences. Likewise regulators can cause problems. Measure the fuel pressure and if its 3 to 4 Psi call it good. As for the carb, remove the foreign object, put it back together and see how she runs. 1 Quote Link to comment
Ed-datsun521 Posted April 14, 2015 Report Share Posted April 14, 2015 Yeah bro I once had this carburetor problem was overflowing it ended up being a small peice of river holding the flow needled by the floater open so check that spray the whole thing with cleaner in the front of it's stock 1 Quote Link to comment
Ed-datsun521 Posted April 14, 2015 Report Share Posted April 14, 2015 * rubber piece 1 Quote Link to comment
Slappy707 Posted April 14, 2015 Author Report Share Posted April 14, 2015 Yea the only thing is if I switch back to the manual fuel pump is I don't have the spacer that I need. I still need to cut out the floor boards and put in some new sheet mmetal so I've got some time to get her running good. Any idea how of thick of metal I should use for the floor boards ? Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.