Jump to content

National engine diffrences from each other


Jrtm

Featured Posts

Ok im going to post some pics hopefully tomorrow. Im trying to identify what needs changine and whats rn and what national.

 

When you look at every pic of a national they seam to be compleatly different.

 

Some have side intakes some have top intakes some have wick covers some have oil or fuel parts on the starting handle cover some on th side if the block some have speed wheels some have cable and a leaver.

 

Im totally confused by mine so will take somd pics and maybe people xan identify what the parts are or what should be there and isnt or whats been replaced and is rn ect ect as its driving me mad!

Link to comment
Share on other sites

Ok here are a few pics ill add the pics with my questions there are a few so bare with me as i dont quite inderstand why some are 1 way and others another

My gears wheels the bigger one goes to the box the smaller to the wheel is this cirrect? If i swap the around in theary there should be less turns but will it?

Breather pipe from top crank case to intake pipe???? Not there on original or on other engines so why mine?

Govener bar from fuel pump to govener im guessing, others i have seen have 2 bars some 1 but are both cases solid with adjusters on mine has a flexi joint in and so is only solid when down but if bounces it lifts up???

Whats this for? Just says to clean turn handle????

Last on i know its the fuel pump the adjuster screws are solid. Its not bad but it can be a little smoky from too much fuel so does need adjusting when i first got her there was a washer stopping it from moveing so much to solve this but it was so down on power you couldnt rev it to stop or go so it was removed has soved the power problem but as said is over fuelung a little

Sorry for all the questions but are others like is as well there are a few other odd bits i have on my engine but dont want to double post with the air filter setups diffrent and the oil to the head and the position of the original diesel filter (im think this is whats on the starting handle tunnel at the top some of them are here some by the block.

post-17927-0-29087700-1474044653_thumb.jpg

post-17927-0-71791800-1474044761_thumb.jpg

post-17927-0-84562800-1474044810_thumb.jpg

post-17927-0-41168600-1474044893_thumb.jpg

post-17927-0-84396900-1474045117_thumb.jpg

post-17927-0-86403600-1474045207_thumb.jpg

Link to comment
Share on other sites

If you are going to show engine porn I think you should polish it first. captain.gif

Sod that ive got a bloody 26" a 15" and a 5" compleate brass stacks to do let aloan the engine.

Also to add my engine is in the wrong place i keep climing over the gearbox and smacking my leg on the oil filter. Stupid thing

Link to comment
Share on other sites

Gear change looks standard

Oil filter is self cleaning turn once engine is off, periodically remove drain to clear out sediment.

At the rear just in view on the oil filter picture is the oil pressure adjustment, some have this on the pump which is a lot harder to get at.

Not seen a breather on a national, In general if an engine is well worn to much oil fumes/oil returning to the intake runs the risk of running on its own fumes.

Bob

Link to comment
Share on other sites

Bob confused. The oil filter is the massive canister i keen smacking my leg on near gear box. Didnt picture that.

 

So whats the little round thing near the water pump that says turn to clean?

Sorry my knolage of these engines is 0 to the the point i just twist ever grease nipple and oil everythnng before i move it as a mechanic i could quite happyly strip it down and work out where everything goes or if it stopped working be able to find the fault but the general i know what tjis bit does i ant got a clue.

Link to comment
Share on other sites

Sounds like you have a remote oil tank, and therefor a 2 part oil pump and dry sump. The object you pictured is a self cleaning oil filter, I have several spare ones.

inside is a series of plates the oil has to force through them leaving the particles behind.

turning the handle moves alternate plates, the particles gather in a clump and fall to the bottom of the housing.

I have some info filed away somewhere,

Bob

Link to comment
Share on other sites

Def not a dry sump. Sump is full of oil. But does have a big remote oil filter when you look at it as the oil pipes come from under the engine. Its not possable that the side oil filter has been bypassed and then the big remote one fitted?

Also is the govener bar to the fuel pump ment to be solid as i know it rattles as it sounds like a bolly pecker when your running.

Link to comment
Share on other sites

Hi

Only you can tell if the oil filter has been bypassed, by following the pipework.

As i said before there is a stud and lock nut on the side of the rotary self cleaning filter which is the adjustable pressure relief valve, exess oil returnes to the sump though the crankcase door. however some pumps also have this valve.

Assuming the filter has been by passed for a modern (better) one, you must have the pump with the valve

Bob

Link to comment
Share on other sites

The 2 pipes come from the remote filter go under the engine then to the original filter and then bolt on at the bottom at 2 joints on the filter. Not sure if these joints have been added or if originally they were just blanked off.

 

But am thinking of removing and putting back to original as the 2 oil pipes arnt very good and 1 leaks a little so needs replacing. Also do i need a modern fuel filter or is the original adequate as again one pipe isnt brilliant. Also what happened to the original excess fuel from the injectors? As mine is designed to go back into the aftermarket fuel filter but is blanked off and goes into a pot.

Link to comment
Share on other sites

  • 4 weeks later...

Been doing some more digging my engine seams to be the only one with a breather pipe.

 

I know why its there but they wernt built with them and many rns dont have them so do i really need a breather on my engine

 

Its also bloody ugly

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.