1970 521

[banzai510(hainz)]

pull the plug wires 1 by 1 and it was firing on all cylinders. 2 and 3 didnt make MUCH difference when the wires were pulled.

OK Im confussed?

 

Oxymoron?

 

it did change or it didnt on 2 and 3.?????????

 

 

ck valve lash on cyl 2 and 3

 

last

put for sale sign on truck

[mklotz70]

It can run hot if it's running lean.....which could be a jet partially blocked in the carb.

[Royal Sierra]

Well I tried everything. There is spark to #2 and #3 but it makes no difference when the plugs are pulled. I poured gas into the carb and it still make no dofference. Guessing I might need a motor. No big deal..l20bs are somewhat cheap. Oil and coolant arent mixed and it doesnt blow white smoke so Im ruling out a head gasket. Giess I will just drive it until I get another engine! I'll throw down some beer for whoever wants to help swap it haha

[mklotz70]

It can still be a head gasket. The thin section right between cyl's 2&3 can blow out and neither cyl will build up compression without losing water or oil. A compression test will tell you.

[banzai510(hainz)]

OK

Tell me exactly what you mean when you pull the plug wire what happens. NO difference.

 

If you get spark, I always assume you got spark unless you flip the wires from 2 and 3 out of order.

 

You can still have SPARK but if you dont have compression the cylinder wont fire, no explosion in chamber thus making fell like its not running right.

 

if motor is not running right and you pull a spark plug wire on a good cylinder it should run even WORSE, not the same.THat tells me soemthing.

 

Open the valve cover and look at the rocker arms and see if a lash pad fell out. and or adjust them. exhaust seats sink over time thus loosing valave lash.

 

Eric owned this truck and it was running like tops when he had it here a few years ago. Unless you got a maker head gasket leak or Over Temp this is a minor issue.

But if you want to change the motor out that fine also

[Royal Sierra]

It was running perfect after I got it running again. Still starts right up. Anyway if you pull the wire off of 1 and 4 it runs worse. 2 & 3 no difference. I will pull the cover when I get home

[skyblue]

compression test it

[Royal Sierra]

Headgasket let go. Pouring white smoke and smells of coolant!

[banzai510(hainz)]

Damn.!!!!!!!!!!!

 

watch this

 

or sell it

[skyblue]

Damn.!!!!!!!!!!!

 

watch this

 

or sell it

for someone who is always talking smack about people giving up on Datsuns and letting them end up in a field you sure advise to sell at the slightest sign of trouble quite a bit. unless that's your sense of humor and you don't really mean it.

 

and sierra, head gasket is the easiest to do on L motors. get 'er done.

[Laecaon]

I can come over today and help with the head gasket... Though, since you drove on it, who knows if the head warped.

[banzai510(hainz)]

sure advise to sell at the slightest sign of trouble quite a bit.

Yeah I know. Im hoping one day it gets more motivated owner.This is the 4th owner of this truck since I first seen it. This one is not in a field. This one is in the street that might get towed Like the guy on here few year back had a mnt 610 2 dr and got towed and cound afford to get it out of impound.= Junkyard.

But I put enough info out there people can get this fixed. Olddatsuns.com has infor. pklus all of us.

 

head gaskets are EZ. key to this one is head warped?. That means more Money which I have a feeling Sierra might not have.

 

Get a good timming chain tool. and maybe some help. Its about a 2 hour job for exp or 3 to 4 for a new person.

 

Key is tak it in steps and in a garage and we can walk you thru it. Mark chain! I repeatt mark the chain!

 

Key to owning Datsuns is RESOURCES.

 

I will help if local but must have good tools ,in gagrage heater ect.... Most never call me. While we are at it a new timming set or at least a slack side guide and a new tensioner.

[banzai510(hainz)]

maybe the headbolts are just loose or the intake manifold loose and sucking in water thru the watter passage?If the head has the holes for the watter passage

[jon521]

head gaskets are simple on these as long as you dont let the tensioner pop out! i have yet to make a tool that holds it in place. everytime ive done an L series headgasket, ive pulled the front cover :/ but even that is simple enough. you get this thing running in a day, even less if jake is helping you out.

[banzai510(hainz)]

he must be working on it for the last 3 days. Since we never heard from him.

[jrock4224]

or craigslist.....

[banzai510(hainz)]

Damn hes gone

After all that work doing up the brakes

[jrock4224]

say what hes gone..no way

[jon521]

a buddy of mine might be picking up the truck from the guy he sold it to, its on craigslist right now for 1100....

[jrock4224]

shut up he really gave up .....jesus i was joking when i posted craigslist.......I guess i'm not suprised ....back on page 7 he was selling it too....bummer

[banzai510(hainz)]

Skyblue!!!!!!!!

How you like me now?

 

 

Popped headgasket? Thats now a 500$ truck. most of it it is the wheels and tires.

 

 

 

I really didnt think he would give up so fast either. There is enough info out now on how to do a headgasket.

2/3 hour job.

[jrock4224]

i was kinda thinking the same...1100 for a popped head gasketed truck ...with possiible head warpage...hmmmmm maybe i should sell my 521 ... start at like 4 k

[banzai510(hainz)]

a buddy of mine might be picking up the truck from the guy he sold it to

 

key word is MIGHT.

 

he better hurry before it gets "Towed" as a abandon vehicle

[oldskoolvws]

man...really gave up that easily?

[jon521]

the guy he sold it to already did the head gasket and got it all checked out for warpage. runs and drives, said he can barely hear the timing chain, and it needs to be timed. my buddy might go look at it friday if it doesnt sell today. royal had his reasons for selling, and its already been done. its not like the truck is getting scrapped or anything. im sure it will go to someone who will take care of it if my buddy isnt able to get it