L20b woes

[The datsun kid]

So I have a 71 521 and I took the tired l16 out and put a supposedly rebuilt l20b with 4speed out of a 77 710 in it so got it all put in and it didn't wanna start then we switched my l16 electronic dizzy with the points dizzy that was off the l20b and we advanced it alot it seemed like it anyhow and so it started and we got it running pretty good but the header studs are jacked so the header doesn't bolt up all the way so fat exhaust leak and it smokes pretty bad it's black smoke but it seems like it runs fine so how could it be that rich? So what did I do wrong? Oh and my cousin put 5qts in it I said it might be too much but he said that he put that in his Datsun with l20b any help would be awesome guys thanks

[Guest 510kamikazifreak]

So I have a 71 521,

I took the tired l16 out, put in a supposedly rebuilt l20b with 4speed,that came out of a 77 710.

The dizzy that was in it,isnt so good so we put in and it didn't want start,

we then switched my l16 electronic dizzy with the points dizzy that came off the l20b and we advanced it alot, it seemed like we did, anyhow,it started, we got it running pretty good but the header studs are broken, so the header doesn't bolt up correctly,the exhaust leak is loud and it smokes pretty bad.

It's black smoke but it seems like it runs fine so how could it be that rich? So what did I do wrong?

Oh yeh, and my cousin put 5qts of oil in it, I told him it might be too much, but he said that he put that in his Datsun with l20b .

 

 

any help would be awesome guys thanks

 

first thing proofread.

that was one of the hardest things to try and decifer

[datzenmike]

5 US qts with a new filter is fine.

 

Can't run a header on a stock '77 motor without changing the intake. So what's the intake and carb from?

Is the gas level with the dot on the glass bull's eye on the front of the carb?

The choke will be on with a cold motor. Did you get it warmed up? The choke should turn off when warm.

[The datsun kid]

Sorry my bad Im a little flustered persae lol I forgot to add i put the l16 oil pan and pickup also I have a 32/36 weber and the intake and Manifold is from my l16 non smog sorry

[EricJB]

What is the level on the dipstick? With an oil pan from the L16, (521 only) that will clear the Tie rod and crossmember, it might not need 5 quarts. I only run 4 quarts in my L23/ 521. The 521 oil pan is pretty small.

[The datsun kid]

The truck is at my uncles so I'll check it tomorrow but I'm pretty dam sure we overfilled it like dumbass's so I'll see what's up with it any reason why it needs to be advanced so far?

[datzenmike]

You can always dump some out until the dipstick reads right.

 

So a 32/36 that was jetted for an L16 is now on an L20B that it 25% larger. May need different jets.

[The datsun kid]

No I have the weber that came with the l20b on it now it's the same 32/36 but like I said it runs good just smokes I'll post up tomorrow if it was the oil or not thanks guys

[Jester]

ifyoudotryandproofreadyourshititreallysuckstotrytoreadsomethingthatsoundslikesomeonejustgotdonerunningamarithonandistryingtotellthestoryofhowtheholerunwentinonebreath. PUNCTUATION. Get it!!!!

 

If you have to have the timing advance, you probably didn't get the distributor in on the right spot. Look down the hole where the dist.goes. That flat blade that goes into the bottom of your dist. should be at the 11:20 position and your dist. at #1

 

I agree with Mike; with a fresh WIX filter it should be a little less than 5 US qts.

[The datsun kid]

I know but I'm on my phone it's kind of shitty lol ok I'll check where the distributer is at

[The datsun kid]

Oh and does anyone have pic of what it's suppose to look like maby

[datzenmike]

Engine at TDC on the compression stroke #1

 

Remove dizzy and look in the hole you should see this from the driver's fender...

 

[The datsun kid]

Thanks mike I watched hainz's video and figuerd it out and so I drained the oil( new goddammit)!! Then I looked at it and it was way off. And so I dropped the oil pump down adjusted it the right way but no it doesn't run!?!? WTF! So your saying they're is a small side and a big side to the spindle head? So I'm guessing I dont have that right? Sssswweeeettttt (palm hits face)

[datzenmike]

Motor must be at TDC on number one compression stroke first.

 

Yes one side is slightly smaller and should be to the front. This off side allows the dizzy to go on in only one position. Look carefully at the posted picture you can see the left side is smaller.

 

 

[The datsun kid]

Ok can I pull the oil pump Down without losing all my new oil I just put in?

[datzenmike]

You might loose 1/4 cup so have some rags handy for the drips. Keep the oil pump vertical so it does not empty and loose it's prime. The paper gasket can be reused if you don't tear it.

[The datsun kid]

Thanks mike don't know what I would do without you