Engine strip down

I have started the engine strip down to find the source of the oil leak/burn.

I have just removed the heads and found this... Thoughts on what I should do.

Piston 1




Piston 2




Piston 3




Piston 4




Really enjoyed stripping this down. Now for the cleaning and rebuild.


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There's definitely some oil in those combustion chambers!..
You'll be changing the piston rings anyway. .You'll be suprised how well they clean up with a soak in diesel and a soft wire brush... Hopefully not coming through worn guides the other way..though if you need to change then I'd check out k-lining them (I think it's called that).. I've got a head in the oven right now to try and get new guides back in mine...

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No - don't do it - burnt valves are not the end of the world

 

As above, clean pistons and barrels, re ring, new big ends, check guides and fit new exhaust valves minimum, re seal barrels to block and sling it back together. But slightly more professionally than slinging

 

thanks for the responses.

Just ordered gasket kit, piston rings, clutch kit (might as well), ignition leads, engine mounts and a few other things.

Going to clean the pistons and hone the barrels and clean the head on Tuesday.

All good, will post pics of the rebuild.

 

So, just had my first oh sh$t & f'ing balls moment.

I was struggling to get the barrels off and a knocked it a little too hard and broke two of the fins off barrel number one. tuesday_wildchild

What should I do? Will it be alright?

 

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Anyone?

 

That will make so little difference I wouldn't worry

 

I was "lucky" with first case barrels came off OK but ended up taking most of the fins off second good case barrels as they were all stuck..

Sure one of the people that know best will be along soon to advise...

Best one I've got ready to throw has one the very small fins at bottom broken it's cruddy but your welcome to it...

You'll find yourself tempted by new stuff as you find broken bits but it soon adds up!!

 

Po put so much sealant on, I'm suprised it came off at all.

Thanks

 

.... See

 

I wouldn't worry about those few fins. As you've discovered, if you're freeing the barrels, just bomp them gently from side to side with your rubber mallet. If you hit the fins at an angle they will, for sure, absolutely certain, snap off. They're really brittle.

 

All off now, this was the only casualty.

Next job, pistons off the conrods and then cleaning.

 

Your gudgeon pins may put up a fight . Threaded rod and washers may help.

 

sounds interesting - explain more....

 

They've been well stuck in on the engines I've done. Bit of heat and an improvised puller may help.

Or...yours may just push out

 

Sounds familiar - were stuck fast on a 1600 TP and both WBX's I've had apart in the T25. Bit of M8 threaded rod, nuts and washers with a large socket as a crude slide hammer on one did wonders!

The T25/WBX also use the expanding metal type shield bolts to grip the inside (as you're working through a tiny hole in the water jacket).

the circlips leave a little ridge on the piston, that's partly what makes it hard to get the pin out. A very gentle filing of his ridge (its very small!) makes refitting them easier!

 

I used exactly the same. They did put up a fight, tho'

 

Ok, like this idea. But why a slide hammer rather than a rod and normal hammer?

This is my first engine strip down, so excuse my stupidity.