Alec 720 Posted July 17, 2012 Report Share Posted July 17, 2012 Hello I'm a new guy, but I've read this forum for a while. A little about myself I live in Missouri and I am 17 years old with a interest in mechanics. Anyway here is a picture of the 1981 Datsun 720 with a Z22 engine I've worked on this a little while so I'll show the latest and then in order Now back to when I first started. This truck had a Automatic transmission in it, but I have a wreaked Nissan D21 with a KA24E :thumbup: and a manual transmission that I plan on using The Engine removed Cleaned up the cluster dashboard... before After. Only 88,000 miles on it :w00t: Dragster style :confused: A air scoop I plan on adding And now with the work on the Z22 engine Cleaning up the intake Manifold I tested the compression on this and the number two cylinder was leaking from the intake, so I cleaned the valves. After removing the head and cleaning it up and painting it Then another recent picture of the front of the truck and a front side On the too do/buy list... - Weber 32/36 Carb - Pacesetter Header - Head-gasket - timing cover gasket - new 225/60 R15 tires - paint semi-gloss Black Which I don't have the money to buy all that yet :crying: actually I haven't spent a cent on all that has been done on this so far. I actually gained a few cents :devil: I have a few other pictures so if you want a new angle I may have it. 2 Quote Link to comment
Z chopper Posted July 17, 2012 Report Share Posted July 17, 2012 cough cough fram alert. Fram Oil filters ruin engines due to the use of cardboard as the filter inside it breaks down and clogs oil passage ways. back end shot of the truck would be cool Welcome to Ratsun Quote Link to comment
Alec 720 Posted July 17, 2012 Author Report Share Posted July 17, 2012 Thanks!! And thanks for the tip I'll keep that in mind. Quote Link to comment
Alec 720 Posted July 18, 2012 Author Report Share Posted July 18, 2012 More on the engine oic's Does the head look like its in good shape? Here is the 2nd cylinder....... whats your guys thoughts on this The cylinder walls look good This is the 1st cylinder and I replaced the oil filter and cleaned the cylinder block Quote Link to comment
Alec 720 Posted July 18, 2012 Author Report Share Posted July 18, 2012 Just cleaned up the head Now I need to get a head gasket and start assembling the engine!! B) Quote Link to comment
Draker Posted July 18, 2012 Report Share Posted July 18, 2012 Looks like detonation on #2, or something was bouncing around in there. Quote Link to comment
Alec 720 Posted July 18, 2012 Author Report Share Posted July 18, 2012 Yeah I was thinking something was bouncing around... The head doesn't have any dents on the number 2 cylinder though. The walls seem to be fine though so I think it should be fine. Could be detonation the exhaust valve in the number 2 cylinder is kinda whitish. Also the leak test showed that the intake valve was leaking in the number 2 cylinder. Quote Link to comment
I'm BLUE Posted July 18, 2012 Report Share Posted July 18, 2012 Nice pics! :thumbup: Good progress especially for your age ! Cylinder #2 does look like detonation ... always better to run a bit rich versus a bit lean :) Head shape ? = measure with a straight-edge and a feeler gauge to check for warpage. If out of spec it will have to be shaved. Keep it up Quote Link to comment
bananahamuck Posted July 18, 2012 Report Share Posted July 18, 2012 Not detonation iv`e seen pistons look like that when something gets into engine ,,or ,, a sparkplug electrode breaks off...You should check the valves and valve seats in that cylinder very closely ,,in case whatever caused it went through them.. Quote Link to comment
I'm BLUE Posted July 18, 2012 Report Share Posted July 18, 2012 Not detonation iv`e seen pistons look like that when something gets into engine ,,or ,, a sparkplug electrode breaks off...You should check the valves and valve seats in that cylinder very closely ,,in case whatever caused it went through them.. That's a scary thought :blink: Guess I've been lucky :) Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 Thanks for all the advice! I don't think any of the spark plug electrodes broke off but I will check. And I cleaned the cleaned the valve seats and they seem to be good. Quote Link to comment
NKrader Posted July 19, 2012 Report Share Posted July 19, 2012 if helpfull i have 4 z22 pistons that look to be in pretty good condition. appart from that, nice log :) lookin to be quite fun Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 I actually have 2 extra Z22 engines :thumbup: in some of those pics you can see the white 720 regular cab and the blue 4x4 king cab. And then I have a KA24E engine which I kinda want to make into a racing engine so that's down the road. But since used engines are so cheap used I may just get a VG30i or something like that since the KA24E has over 200,000 miles on it. Quote Link to comment
datzenmike Posted July 19, 2012 Report Share Posted July 19, 2012 Looks like FOD foreign object damage on the piston top. If the head doesn't have the same marks then it has been changed before you got it. Hang onto that Z22 block they make great LZ22/23 motors. Forget the hood scoop it will only look like you put a hood scoop on it. If you want cold air run some drier hose to one of the missing headlights. That truck is in pretty good shape for an '81. Watch the horizontal bed seams on it. They were a problem area for rusting out. Quote Link to comment
carterb Posted July 19, 2012 Report Share Posted July 19, 2012 The chromed out engine block is cool! You should paint the whole truck chrome, black out the grill add some red LED's like a Cylon! 1 Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 Lol no the truck will be Black. Chrome cars/trucks just look weird, Leds would be cool though. And actually the engine isn't chromed its just silver engine paint. Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 Looks like FOD foreign object damage on the piston top. If the head doesn't have the same marks then it has been changed before you got it. Hang onto that Z22 block they make great LZ22/23 motors. Forget the hood scoop it will only look like you put a hood scoop on it. If you want cold air run some drier hose to one of the missing headlights. That truck is in pretty good shape for an '81. Watch the horizontal bed seams on it. They were a problem area for rusting out. Actually the Bed is in Really good shape I'll try to take some oics of it today. And with the hood scoop you are probably right. But I was thinking that it could be possible to make a Cowl with one of the hoods I'll probably try it on the old hood sometime, somebody had stood on the hood or something because the cross beams are bent and all. Quote Link to comment
nis720 Posted July 19, 2012 Report Share Posted July 19, 2012 Z motor cleans up well... I've always liked the aluminum valve cover. Truck is looking good but I vote on no scoop. Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 Ok I'll leave the hood scoop off. What do you guys think of the Induction Cowl. With that I was thinking of cutting down the 2 ridges and lift it up about 3 inches and then weld some medal to the sides 1 Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 Here are oics of the bed And then the interior And then one of the seats I want to install this is the passenger side the drivers side seat is powered B) And finally the white Datsuns hood I'm going to work on it, to see if I can cowl it. The old hood was kinda bent up and all, I actually carried the hood for a 1/2 mile (we have a 160 acre place) in 100 degree's! Boy what you will do for a Datsun. Even though it looks in bad shape its actually pretty good and its straight! And to make you all envious here is the shop :devil: Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 I cut into the hood B) 3 1/2 inches high Side view And then I did it 5 1/2 inches high just to see how it looks So what do you guys think?? Quote Link to comment
Z chopper Posted July 19, 2012 Report Share Posted July 19, 2012 2" would be high enough for the cowl induction, but to be honest unless you are installing an engine that needs cowl induction don't do it.. read through this thread for styling cues http://community.ratsun.net/topic/14709-project-against-the-grain-un-jdm-build/ Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 In the future yeah I'll probably need the cowl. Right now its just something to keep me patient until I have the money to work on the engine more. And whenever I have money I want to install either a turbo'd Nissan Engine or a Chevy Small Block Engine (I have a running Chevy 350 with a Edelbrock Carb and Edelbrock Intake Manifold and also a extra 350 block, but no working transmission). And thanks for posting that thread! man that is one sick truck! Quote Link to comment
Alec 720 Posted July 19, 2012 Author Report Share Posted July 19, 2012 I was searching on google and I found 2 720's with cowled hoods Quote Link to comment
KhausticMess Posted July 20, 2012 Report Share Posted July 20, 2012 Bah, I wish my 81 KC had an interior as clean as yours. Quote Link to comment
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