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Discussion Starter #1
Hi folk, Just a bit of info needed for the removal of piston from a 2001 2.0 ts engine. Is it at all possible to remove a piston from the bottom of the engine or does the crank get in the way making it impossible??
 
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Doubt it.... Not tried it myself as you need to take the head off to get it back in...
 

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Plus you'd most likley break the rings as they go over the wear lip at the bottom. Actually this can happen if you go out the top as well.
 

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Discussion Starter #4
Is it not possible to replace the piston back through the bottom on these engines then as on some others it is??? I would also think the lip at the bottom of the bore would have a lesser lip than the top being that is the end that takes the compression stroke? Ultimatly I am hoping to check out a loss of compresion in one cylinder without having to remove the head straight away. Any more thoughts??
 

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I haven't tried it on a TS engine but thought about it on a Boxer.
I think the problem in that case was that the crank would be in the way and you can't take the crank off without removing the gearbox and all of a sudden you are into more work.

Don't the old techniques for diagnosing compression loss work? e.g. oil down the bores?
 

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I've had a piston and con rod out of the bottom of a 1.8 TS engine with the block and crank in situ. The same piston and new con rod went back in through the top using a ring compressor but the head was off. With the crank in position I doubt you would get the ring compressor in place to facilitiate getting the piston back in from underneath. Will you be fitting new rings? You'll want to scuff the bores first right?
 

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I've had a piston and con rod out of the bottom of a 1.8 TS engine with the block and crank in situ. The same piston and new con rod went back in through the top using a ring compressor but the head was off. With the crank in position I doubt you would get the ring compressor in place to facilitiate getting the piston back in from underneath. Will you be fitting new rings? You'll want to scuff the bores first right?
How the hell did you do that ? The piston won't come past the journals for the crank shaft even if the shaft is out.

Piston in & out from the top with the head off.
 

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Even if it would, not much point if the head has to be off? Knock it up from the bottom, with that good old hammers hickory handle.:):
 

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Discussion Starter #10
Are these engines well known for ring failure or burning out valves?? I've not heard of it before but then I have a far lesser knowledge than most of you guys!
 
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Before you start tearing it apart you need to determine what the problem is. If compression is down on one pot, try putting a bit of oil in there. You don't need much, an egg cup full will do. Do the comp test again with the oil in. If the figure increases, your problem is the bottom end, if it stays the same, it's the top end.
 

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Discussion Starter #12
Thanks keithyboy, sounds like a good plan. I have only secondhand info to go on at the moment as hsve not picked the car up yet. Other symptoms included oil being forced up the dipstick tube and all over the top of the engine. Initial thoughts of mine were broken ring on the suspect cylinder.
 

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Doesn't the dipstick have rubber seals on the top? Are they intact?
These twinsparks all seem to have a bit of crankcase pressure.

How far out as a % is the compression on the suspect cylinder?
 

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Hi folk, Just a bit of info needed for the removal of piston from a 2001 2.0 ts engine. Is it at all possible to remove a piston from the bottom of the engine or does the crank get in the way making it impossible??

No, you wont get it out and you certainly wouldn't get it back in. The crank, oil jets and common sense are in the way.
 

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How the hell did you do that ? The piston won't come past the journals for the crank shaft even if the shaft is out.

Piston in & out from the top with the head off.
Sorry. Got that arse about face. Had a bent con rod from a hydro lock and it would not come out so had to go in from underneath to shave off some of the con rod so that it would travel up the cylinder.
 

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No, you wont get it out and you certainly wouldn't get it back in. The crank, oil jets and common sense are in the way.
Absolutely what he said.
Take the head off fella, don't go wasting time & effort trying to get piston out the bottom.
The guy that reckons to have done it was just dreaming in the night.
 

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Sorry. Got that arse about face. Had a bent con rod from a hydro lock and it would not come out so had to go in from underneath to shave off some of the con rod so that it would travel up the cylinder.
Ahh !......the truth will out !
 

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I have a bit of a theory about black krud in the slots behind the rings ruining compression. If the rings can't move they can't seal against the bores properly and there are also small lubrication holes through from under the piston to the rings that will be blocked.

Has anyone had any success using a flush like Forte?
 

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I have a bit of a theory about black krud in the slots behind the rings ruining compression. If the rings can't move they can't seal against the bores properly and there are also small lubrication holes through from under the piston to the rings that will be blocked.

Has anyone had any success using a flush like Forte?

It doesn't work, the crud builds up from oil vapour and moisture brought in from the breather lines to the air inlet duct, as the engine cools you get condensation between the Alloy pistons ans polished chrome bores, the only way to clean it is to remove the pistons and take off the rings.
 

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