83 720

[That Ol 720]

[KELMO]

Looks like a fairly unmolested truck.

 

I am curious, does the tailgate say Datsun? y girlfriend (at the time, long time ago) bought one of these new and I cannot remember what was on the tailgate.

[Charlie69]

My 1980 720s Had Datsun embossed on the tail gate.  I still have 1980 tail gate I will use on my 84 ST.

[KELMO]

Just can't remember if '83 tailgate was Datsun or Nissan. Mostly sure '84 was Nissan.

 

 

My attention at the time was focused on the back of something else.

[datzenmike]

'82 was the last year for DATSUN 11 '82 was the start of the '83 model year and the full change to NISSAN stamped tail gates. In a 'tip 'o the hat' to the earlier Datsun marque the '83s and perhaps the '84s had DATSUN decals on them. The '84 was similarly stamped but the '85 tailgate has a recess across the back with a finisher panel in it with NISSAN lettering.

 

That said it's possible that a few '82 DATSUN stamped tailgates found their way onto some '83s.

 

[seattle smitty]

That little truck is gorgeous!!

[captain720]

The 84 was the last year I have seen with the nod to Datsun on the tailgate

[captain720]

That ol 720 is in my neck of the woods, we met up and worked on his truck a bit. 

 

Updates he's got synthetic oil in everything so the problems associated with that, manifold water leak, some fuel leaks, front and rear seals, over torqued pan gasket, and some other odds and ends to work out. Needs a banjo bolt for his PS pump.

[captain720]

Also the usual timing, fuel pressure issues, valve adjustment. We got some fun stuff to do!!

[That Ol 720]

On 9/4/2021 at 7:09 AM, KELMO said:

Looks like a fairly unmolested truck.

 

I am curious, does the tailgate say Datsun? y girlfriend (at the time, long time ago) bought one of these new and I cannot remember what was on the tailgate.

Nope it says Nissan in all caps

[Charlie69]

51 minutes ago, captain720 said:

That ol 720 is in my neck of the woods, we met up and worked on his truck a bit. 

 

Updates he's got synthetic oil in everything so the problems associated with that, manifold water leak, some fuel leaks, front and rear seals, over torqued pan gasket, and some other odds and ends to work out. Needs a banjo bolt for his PS pump.

Pm me your address and I will send you one, you will need new crush washers as I do not have any, but I will include a used one to help your search.

[captain720]

I will have this ol 720 pm you, he's got a crush washer still hanging on so should be able to find one. Do you mind if I find him you email?

[Charlie69]

Giving Ol 720 my email is fine.

 

It is nice to see you helping people captain720.

Edited September 7, 2021 by Charlie69

[captain720]

4 minutes ago, Charlie69 said:

Giving Ol 720 my email is fine.

 

It is nice to see you helping people captain720.

Hey Charlie you've done a lot for me man, least I can do is help another buddy out

[Charlie69]

1 minute ago, captain720 said:

Hey Charlie you've done a lot for me man, least I can do is help another buddy out

This is how the world is supposed to work.

[captain720]

This ol 720 is currently off the road due to an intake manifold leak causing white smoke (fingers crossed) and some fuel leaks right next to exhaust leaks. Work day and updates coming soon.

[datzenmike]

White is steam from 'burned' coolant. Exhaust will have antifreeze smell and rad will be constantly in need of topping up.

 

Coolant sucked into the intake port. Very unlikely if it's never been off and gasket replaced. More likely the head gasket is blown.  Pull plugs. The cleanest one with be the steam cleaned one.

[That Ol 720]

I haven't had to refill my Coolant very regularly. It's only been refilled 2 times since I noticed about 4 months ago. Also the white smoke is a semi rare occasion, but it still happens and with it comes shuttering and a obvious loss of power which makes me a bit nervous. Also I did a compression test about a month ago and all 4 cylinders were 160-170 cold. The last time I looked at my plugs they were all the same. It runs a bit more on the richer side of things. There is also a small amount of Coolant pooling on the intake Manifold by the thermostat housing.

[captain720]

Someone else rebuild the motor and installed a Weber a wile back to fix a burned valve so the intake manifold gasket was replaced by someone else and it seems to have been pinched or it slipped on install.

[Charlie69]

Studs help prevent this problem.  On my rebuilt Z20 engine my exhaust manifold has all new studs.

[datzenmike]

Check the bolts are tight. One may have been missed.

[That Ol 720]

19 hours ago, datzenmike said:

Check the bolts are tight. One may have been missed.

So I went around and tightened the ones that needed tightening. There were 3 that definitely needed it and 1 more that I just snugged up a but more. All the rest were fine.

[datzenmike]

That may work.

[captain720]

Intake manifold gasket replaced, one of the bolt holes has slightly damaged threads on the head so when the last guy installed the gasket the bolt felt tight before it was actually touching the manifold causing a leak between #1 and the big water passages so water and air we're getting into #1. Replaced with a bolt 5mm shorter than stock and everything seems to be great now with slightly more power and no leaks (that we know of yet ;)).

 

Also it seems to have a maladjusted float level, no fuel pressure regulator, the wrong jets, and some other stuff. So it has a top speed of 55 uphill and if you floor it you get gnarly intake mani backfires but only if not on level ground. 

 

The rear gears in this one seems to be rather high, havn't check the ratio yet but it's like 2200 rpm at 25 mph in second. Speedometer is accurate so tires size does not seem to be causing that

 

[captain720]

Valves adjusted last night, most were close to spec. Distributor cap is the aluminum kind not the brass/bronze type and has a lot of oxidization on the contacts plus the rotor is nearly gone, could be the cause of some problems