EA81 or EJ in Brumby

[Silverbullet]

i have only been half following your thread Sam, what happened? Was it the slugishness, and new carbys manifolds etc? What was it in the end?
Mud_King91 sorry no idea what happened to your rodeo, got a thread and or pics?
Cheers Cam

Nah it was running beautifully with a carb I rebuilt a while ago, plenty of pull and just felt fantastic. Then a main bearing failed after going up a long hill (not very steep though) So I ditched the whole engine+carby for a subareck one, and now I have the sluggishness etc...and leaky welch plugs...it never ends

[Brumby Kid]

Well theres your problem. Thats gotta suck. Why did it fail do you think? And why did you change it all?

[steptoe]

BK - please don't put Sam through it all - especially before it has been resolved. YOU will learn a bit if you read his thread

[Brumby Kid]

Sorry, Yeah i know it has been very tough for him, especially when you buy a whole new engine from someone reputable, and then you have all of these problems.
When rebuilding an engine, is there anything i should watch out for? I know you need to keep it all nice and clean, without contaminents, especially onced its ready to go back in.
Cheers Cam

[mud_king91]

check cam and crank for hair line fractures they can be trouble also overheated metals can be a twat down the track if not fixed other than that just try and keep it clean make sure the bearing journals are spotless before you fit the bearings/caps also when you tighten the bearings on either crank or cam make sure you turn it by hand before it goes back together... made that mistake on my first rebuild

[Silverbullet]

Haha Jonno I don't mind re-living it if it means Cam doesn't have to go through the same thing Have a couple of ideas why it might have failed, told you one in that PM I sent. Can't be sure though because I didn't autopsy the engine, was just fed up with it by that point.

Before you start, buy about 3 boxes of glad snap lock bags, keep them and a sharpie handy. When you take any set of bolts out, gudgeon pins, springs etc put them in their own bag and label it exactly. Eg when you take #3 gudgeon pin out, put it in a bag labelled #3 pin. All of the flywheel to crankshaft bolts in one bag, labelled, all the lifters in seperate bags (#3 intake, #3 exhaust) etc etc

You will have a big pile of plastic by the end but it really helps when you come to put it back together. Increases your chances of not having any bolts left over at the end

[El_Freddo]

Brumby Kid - also look at getting a different cam grind than what came out from the factory. Ask Steptoe about it as I believe he's done several cam grinds and would be able to give you an idea of what would be best for your application

Cheers

Bennie

[Brumby Kid]

Thanks Sam, thats a good idea. so take it apart, LABLE EVERYTHING, get new stuff, Bolts, Gaskets, Welch Plugs, get everything machined? and ask you guys for specs on how much it should be ground? Yeah simple except the getting it machined, or gound, what to get machined or ground and what specs to get it done by. AHH

[Brumby Kid]

BOO YEAH! The Inox worked a treat! (except i overfilled with water so i had to take some out. Perfect! Ran it for 20 mins. then every half hour im just turning it over for 5 secs and seeing if its still got a charge. Will be making those build threads soon.
Very happy!
Did see some coolant on the opisite side to the supposed head gasket so it may be a welch plug.
Where are the welch plugs? i know they're in the head but how do i get to them?
except for when they're stuffed, or if your rebuilding, do you need new gaskets?

Cam

[Silverbullet]

Welch plugs: Take a rocker cover off, look around under the rocker gear etc and there will be I think 3 round plugs, I think they are 20mm or so.

[steptoe]

usually need engine out to gain access to swing tools at them on EA81 and EA82, just a new rocker cover gasket