How To Revive Your Old Engine For

[B-Master]

DISCLAMER DO THIS AT YOUR OWN RISK

First off i want to say i have been working on Nitro engines for 10+ years now and i have been doing this process on my engines for about 5 years i have ported and polished a large number of engines in thhe past you will eaisly get another 2+ gallons out of the enigne after this process i will try to walk you through this and yes this really costs £1 to revive a old engine with no compression (providing there is no internal dmg to the pistion/liner/bearings)i normaly replace bearings but thats another "How To"

Ok the engine

This engine has eaisly seen 5 gallons of fuel and has been a great engine in the time i have owend it but its been thrown in my pit box (after i had put after run in it and sealed it in a plastic bag) i was going to use it for spares but thought i would revive it.. the engine had no compression atall if held up by the flywheel and let drop it woulc do a complete 360 and hit me in the knuckles

All you need is a jubaliee clip and a old warn out engine

Ok here we go start off with a nice clean(ish) work space

Next step is to give your engine a good clean on the exterior take some break cleaner and a toothbrush and give it a nice scrub make sure you block up all the holes (exhaust/carb) ahh nice and clean now

start to strip her down

first off remove the cooling head then remove the back plate turn the flywheel so the pistion is at BCD then feed a ziptie through the exhaust outlet then out the top of the engine then slowly turn the flywheel dont apply to much pressure and you will see the Liner pop up from the crank case

You may need to give it a helping hand out you can use the back end of your toothbrush you used to clean then crank here to push it up from the backplate hole again be very carefull not to ass to much pressure and out it pops

Now remove the piston and crank these will pop out very easy although they may need a bit of a push but normaly they will just pop right out

So now you have the engine all striped down

Once your engine is complety striped its time to clean up the internals normaly after a few gallons of fuel you will have blown some plugs when they blow the element will enter the chamber and because of the extreme heat they will forge to the head button and possibly the top of the pistion we need to remove this and smooth it out.

Take your dremel and "carefull" grind away the parts of the element forged on to the button and piston head i must stress a steedy hand and a good eye is needed here once your happy with the result smooth off the head and button and polish it up removing all traces of grinding the parts you should have a result like this ( sorry pics quality isnt very good)

Next step is to revive your liner (PINCH) this is where the jubalie clip comes in you need to fit the jubalie clip over the liner and push it up snug to the top of the liner lip then clamp it down so that its nice and tight

once the jubalie is in place take your liner to the kitchen hobb make sure the hobb is nice and hot then place the liner on the hobb "as pictured" and let it heat up for 1-2 minutes once the liner is hot (WEAR GLOVES) make a VERY SMALL adjustment to the screw on the Jublie clip quater of a turn will normaly be enough to pinch most engines.

Do not remove the clip and let the liner cool down for about 30 minutes then test fit the pistion if the pinch was sucessfull the pistion will be very tight near the top of the liner if it dosent or your not happy with the amount of pinch you have given them repeat the above process untill your happy but normaly quater of a turn is plenty if you got the jubaliie clip nice and tight before you began this process

Now you have the liner pinched to how you want it its time to clean up that liner i normaly just use a SOFT rotery wire brush tool in my dremel and slowly remove all the crud off the liner a little tip for this is push a cloth through the liner this gives your something to hold on to when cleaning and polishing.

Be sure to pay extra attention to the ports with the soft wire brush tool and remove all resadue once you have done this just buff it up with a soft buffing rotery tool you should end up with the below result

Note while i had the engine apart i ported it to give me more power for the engine as you can see in the pics but i wont go in to porting today maybe another time

PART 2 COMMING SOON

Part 2

After about 5 mins of cleaning up the liner with the rotery wire brush tool its time to polish it up i normaly just use a soft buffing tool with a very small amount of polish this part normaly takes about 15 mins of dilagent polishing taking time in and around the ports especialy the ones i have recetly ground down for improved RPM power her are a few photos of the liner after its been polished and cleaned with motor cleaner

Image after using wire brush tool as you can see its starting to look semi deicent

Some images of the ported and polished liner this will be a little screamer with all the work i have done to this liner

Now its time to rebuild the engine here is a photo of the engine built with the pistion at TDC as you can see it will eaisly push the liner back out of the case due to the pinch thats been put in there i also did a compression test on the engine to make sure there is no drop in pressure at TDC and there was nothing noticable while it was cold so its all looking good

When your rebuilding the engine make sure you seal it up properly i use instant gasket around the carb neck as i seat it in and also around the backplate before you seat i in position make sure you let this cure for 24 hours before you use the engine

Once you have fully built the engine and let the sealent cure for 24 hours you want to reset your HSN and LSN to defult settings or atleast back off the HSN 1 full turn and begin the break in process again you need to treat this like a new engine if you want it to last as i said above thhere is no reason why this engine if looked after will happily last 2-3 more gallons of fuel and still searve you very well

Well there you go took me a while to write all this up i hope you enjoyed the read and it wasent to long winded and thats how you referb a engine for £1 yourself so if your feeling confident have a go on a "OLD KNACKERD" engine rember i have been doing this for a fair few years now but hope this helped

here is the engine that would turn a full 360 and not hold a fly let alone its own weight now its nice and tight at TDC and holds its weight and its even a struggle to turn it over by hand almost as good as new (almost) thats a good £1 spent

Regards

B-Master

[tom24-7]

really cool how much do you charge to port an service an engine ? i may have one for you soon:good:

[henzy190]

port tut please

and thats a great guide, I've always wondered how exactly you pinch an engine and this is a good pointer

[B-Master]

let me finish this tutorial first then i will think about making a port and polish tutorial but its not a very easy tutorial to do really beacuse most engines are diffrent and will need diffrent types of porting done depending on if you want top/mid/botttom end improvments i tend to always port my engines from new but i have port and polished used engines before its less impact but it is still very noticable

[Nick]

Awesome guide B-Master!!!

Very well written and great photos.

[B-Master]

Hi tom24-7 throw me a PM let me know what engine you got and and what you want done and i will let you know how much to referb it for you if you wish

[m3lyc]

Excellent guide! I have an old OS 28XZ that could do with reviving. Hell I could get the cr back to it's nitro guise....

Lee.

[martleeds]

I used the jubilee clip method last week on a trx 2.5, worked an absolute treat, the piston pushed all the way past tdc, a careful pinch and it bites about 6mm down the liner now, going to try it on an old trx.15 next

[sonic2810]

very nice guide dont even run nitro anymore but was a good read top work

[Neil-M]

Fantastic mate, best tutorial i have seen in a long time, the porting thread should be good can't wait.

Nice work mate

[B-Master]

thanks very much for your kind words guys i am glad its appericated it took a while and with the hard times currently its always good to save some money

i have had a fair few pms regarding doing a porting tutorial i will try and do this over the weekend i have another spare engine sat in my box i will see if its sevicable

I have also had a fair few PMs asking how much i charge to do this for people i dident really write this guys to sale a service but i am happy to do this for you if your not confident enough or dont have the time if you let me know what engine you have and a few other details i will ask for i will let you know a price

thanks for all your PMs and kind words

[turbodaz]

Nice write up thanks for taking the time out to type it all out.

[DannyP]

This is awsome dude Sure i will put it to use one day! Looking forward to the 'port and polish guide'

[hazza1304]

Really well written tutorial with great pictures

[dazj10]

what a great thread that is,, its good to see you go through so much trouble to help others , i will definately be trying this over the next week or so i think on a old knackered engine, i will let you know how it goes

added to my favourites

Edited February 19, 2011 by dazj10

[wolfie1]

good tutorial

[koiboy]

How well does it work? How long does the pinch last for? Thinking about doing it on my traxxas nitro sport

Thanks

Elliot

[dazj10]

as said in first post mate 2-3 gallon ,,, worth it for

[koiboy]

Oops never saw that. Yh well worth it. Will also give me something to do since my svage in running so well

[badger906]

very good guide ive read about using a jubilee clip before, but alway wondered if it gave equal pressure all the way around. May try this with my s9 as its already had one pinch (but not been used since) so when it goes again iv nothing to loose

[B-Master]

dazj10thanks for your kind words would love to know how you get on when you try it .. some photos would be nice and if you have any questions atall please PM me happy to help out

koiboy it depends how well you look after your engines and how well you do the process i tend to get about 2-3 more gallons out of a engine before its dead and you dont really want to do this process more than once you can try but you may only get a gallon if that

badger906 if done correct you will get equal pinch all round i also have a proper engine pinching kit (not jubaliie i did this guide to save people money and before i treated myself to a proper pinch kit i used this methord all the time and i really dont notice much diffrance between a jubalii and a proper kit (ofc there is some diffrance )

Edited February 20, 2011 by B-Master

[Mitman]

Great guide!

Now where did i throw that old Picco??

[skuall]

Great guide!

but now off the topic.......whats the specs of the Fioroni "Penta" 5 Shoes is it 38mm???

Edited February 27, 2011 by skuall

[B-Master]

its 36mm mate but i am now using the adjustable Quattro which is 32-35mm and its a awsome clutch system fits on my king box and smd box fine in my losi and mugens

Edited February 27, 2011 by B-Master

[skuall]

i have an Ascendancy Racing Effortless Racing Clutch Kit (34mm) i tried on my hyper but its to small i tink it uses 38mm..... maybe can use that 36mm what do you rekon??