Piston inspection - Alfa Romeo Forum
You are currently unregistered, register for more features.    
 
Thread Tools
(Post Link) post #1 of 10 Old 05-01-11 Thread Starter
Status: Arggghhhhh
AO Member
 
Alfa 156 JTD's Avatar
 
Join Date: Oct 2010
Location: United Kingdom
County: Greater London
Posts: 207

Member car:

Alfa 156 2.4 JTD

Piston inspection

2.4 JTD 10v

Is it possible to pull a piston down from the bores over the crankshaft

I need to have a look at the piston rings without stripping the head down ?

Last edited by Alfa 156 JTD; 07-01-11 at 16:41.
Alfa 156 JTD is offline  
Sponsored Links
Advertisement
 
(Post Link) post #2 of 10 Old 07-01-11 Thread Starter
Status: Arggghhhhh
AO Member
 
Alfa 156 JTD's Avatar
 
Join Date: Oct 2010
Location: United Kingdom
County: Greater London
Posts: 207

Member car:

Alfa 156 2.4 JTD

Guess I'll have to find out then
Alfa 156 JTD is offline  
Status: -
AO Silver Member
 
seadart's Avatar
 
Join Date: Oct 2010
Location: United Kingdom
County: Hampshire
Posts: 2,197
Not usually mate..I've always pulled them from the top.. and anyway how are you going to get em back in again..??
seadart is offline  
Status: Alfa-less
AO Member
 
torque's Avatar
 
Join Date: Nov 2010
Location: United Kingdom
County: Durham
Posts: 468

Member car:

Nowt

a piston ring compressor might not work if you are refitting them from the crank side.

It's a head-off job unfortunately
torque is offline  
(Post Link) post #5 of 10 Old 08-01-11 Thread Starter
Status: Arggghhhhh
AO Member
 
Alfa 156 JTD's Avatar
 
Join Date: Oct 2010
Location: United Kingdom
County: Greater London
Posts: 207

Member car:

Alfa 156 2.4 JTD

Either way the sumps gotta come off I suppose !!

I'll have a look as I have a stuck number 4 piston ring from when the head gasket went.

Engine stood for 8 months I think the compression rings stuck.
Alfa 156 JTD is offline  
Status: faclifting a 156
AO Silver Member
 
biffa's Avatar
 
Join Date: Oct 2006
Location: United Kingdom
County: Lancashire
Posts: 3,199
There is no way a conrod and piston will pass a crank, when you remove the sump all will become clear...
biffa is offline  
(Post Link) post #7 of 10 Old 10-01-11 Thread Starter
Status: Arggghhhhh
AO Member
 
Alfa 156 JTD's Avatar
 
Join Date: Oct 2010
Location: United Kingdom
County: Greater London
Posts: 207

Member car:

Alfa 156 2.4 JTD

Yea I just want to pull it down enough to get to the rings

But I guess its going to be very close with the bigger diesel pistons.
Alfa 156 JTD is offline  
Status: -
AO Silver Member
 
seadart's Avatar
 
Join Date: Oct 2010
Location: United Kingdom
County: Hampshire
Posts: 2,197
Quote:
Originally Posted by Alfa 156 JTD View Post
Yea I just want to pull it down enough to get to the rings

But I guess its going to be very close with the bigger diesel pistons.
You wont be able to.. head off I'm afraid.

And even if you could pull the piston down far enough to pop the rings you'd never get it back in again...

just not enough room..

If you think a ring's siezed.. pour some Red X into the plug hole and leave it for a week.. see what happens..

Last edited by seadart; 12-01-11 at 08:04.
seadart is offline  
(Post Link) post #9 of 10 Old 24-01-11 Thread Starter
Status: Arggghhhhh
AO Member
 
Alfa 156 JTD's Avatar
 
Join Date: Oct 2010
Location: United Kingdom
County: Greater London
Posts: 207

Member car:

Alfa 156 2.4 JTD

Success !!!

I used B12 Chemtool, got my m8 to send some in from USA.

Jacked up the car so the block was levelled removed the injector poured in the lethal concoction, let it soak for 4 days topping up and blowing into the piston crown with a long neoprene pipe (plastic straw melts) to get it around the bore.

Took it for a WOT thrashing smoke everywhere...................and more smoke.............changed the oil and filter.

Next day started it up ....bit of smoke......then .........

Looked all clear, took it for MOT passed all tests on the emissions and only 1 advisory, inner cv boots split.

So one unjammed piston ring without stripping down the engine.

Start of the story

https://www.alfaowner.com/Forum/engin...jtd-2-4-a.html

Last edited by Alfa 156 JTD; 24-01-11 at 17:02.
Alfa 156 JTD is offline  
Status: [URL
AO Silver Member
 
Join Date: Oct 2007
Location: United Kingdom
County: Wrexham
Posts: 1,758
good result, post back on here if its still o.k. after a few k miles.
sussexa is offline  
Reply

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Engines (TS, JTS, JTD & V6)

Tags
inspection , piston

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome