The Top Mitsubishi Galant VR-4 Resource

Join the best E39A 1991-1992 Mitsubishi Galant VR-4 community and document your GVR4 journey.

  • Software Upgraded - Reset Your Password to Login
    In order to log in after the forum software change, you need to reset your password. If you don't have access to the email address you used to register your GVR4.org account, you won't be able to reset your password. In that case, follow the instructions here to regain access to the forum.

How's the cylinder look? Found the low comp culprit

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
I bought 556/1000 knowing it needed work. I knew cylinder one had blowby and low compression . How does the rest look ? 3.5hrs start to finish me and 1 others first timer.
null_zps7331d3c2.jpg

null_zps362c15e2.jpg

null_zps59d5ba9c.jpg

null_zps502061e5.jpg

null_zps8b60bacb.jpg

Cylinder one :
null_zps7a662ba6.jpg
 
Last edited:

rdomeck

Well-known member
Joined
Jun 1, 2011
Messages
620
Location
Indianapolis, In.
Looks ok? Just ignore the piece of missing piston, I'm sure it's not important!
 

992gnt

Well-known member
Joined
Jun 15, 2013
Messages
55
Location
Edgewood, KY
What does cylinder 1 look like? And where did that chunk go??? /ubbthreads/images/graemlins/ooo.gif
 

AllanL

Well-known member
Joined
Aug 4, 2008
Messages
294
Location
NV
aside from #1, others look good with a little DIY honing to clean...

ever find out what caused that piston #1 edge to chip off? /ubbthreads/images/graemlins/dunno.gif

and where that missing went? /ubbthreads/images/graemlins/bawling.gif
 

LIV4PSI

Well-known member
Joined
Nov 24, 2011
Messages
1,774
Location
O-H-I-O
I would be scared to run the head or turbo that came from an engine that is missing a huge chunk of metal like that.
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
I bought the car this way. I bought it from Circuit here on the board knowing it had low compression. Has new timing belt components and gaskets. New Fp manifold with brand new Evo III 16g..... Haven't found the chunk, it wasn't in the cylinder...... Turbo is also still good. He said he bought the motor and didn't know it the cause of the low compression. Hopefully the chunk left a long time ago before I got ahold of it.
 

holeshotmoe

Well-known member
Joined
Apr 7, 2005
Messages
1,291
Location
MD
The piece is probably long gone but check the exhaust ports of the head to be sure it didn't hang up in there. Also, are those aluminum bubbles on the top of the piston?
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Well that's going to be fun, thought a simple honing would do the trick with 2G pistons. Hmmm I didn't notice the bubbles, ill have to recheck tomorrow.
 

turbophein

Well-known member
Joined
Feb 17, 2009
Messages
683
Location
mass
Quoting holeshotmoe:
The piece is probably long gone but check the exhaust ports of the head to be sure it didn't hang up in there. Also, are those aluminum bubbles on the top of the piston?



The bubbles look like coolant to me... dirty from the carbon
 

pmp285

Well-known member
Joined
Feb 23, 2010
Messages
76
Location
manila,philippines
Have the bore measures first. It might still be ok. I think the original owner of the engine rebuilt it with a broken piston in the first place to pass it off as a complete engine to get a good price... Cause most likely you will see pieces or melted parts all over the cylinder
 

dsm10o0

Well-known member
Joined
Jun 16, 2010
Messages
680
Location
San Jose CA
Put piston 1 down and take a pic of the wall where the melted is.

Previous owner was probably abusing it and misfired up top.
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Quoting pmp285:
Have the bore measures first. It might still be ok. I think the original owner of the engine rebuilt it with a broken piston in the first place to pass it off as a complete engine to get a good price... Cause most likely you will see pieces or melted parts all over the cylinder




That's what I was thinking. He bought the motor used from a member on tuners, the original motor is now with Steve001??? Nico, I'll text you pics in a bit and ill post it here as well
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Bump, Cylinder one, doesn't feel like there's any dips in the wall:
null_zps9779c6d5.jpg

null_zps3989c7ff.jpg

null_zpsfbbf2b08.jpg

null_zps9a67b114.jpg


Btw it is just coolant droplets on top lol.
 

strokin4dr

Well-known member
Joined
Aug 30, 2005
Messages
2,770
Location
Savannah, GA
Doesn't look too bad, but still need to measure the bore to make sure it is in spec. If so, you can probably get away with just honing it and dropping in some new pistons.
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
I sure hope it's ok. Thanks.
 

donniekak

Well-known member
Joined
Jan 1, 2009
Messages
748
Location
surprise az
I don't think you can feel a .0004" out of round cylinder by hand.
Go ahead, throw some pistons in there, and you'll have blowby that torches another piston, or maybe not. Why not be sure and build it properly?
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
I'll have to get it measured. I'm awaiting help from nico so when he has time he can come check it out.
 
Support Vendors who Support the GVR-4 Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications RixRacing RockAuto RTM Racing STM Tuned

Recent Forum Posts

Top