LSJ reliability past 120K miles (motor swap or not) - Cobalt SS Network

Go Back  Cobalt SS Network > Engine Technical Discussion > 2.0L LSJ Performance Tech
LSJ reliability past 120K  miles (motor swap or not) >

LSJ reliability past 120K miles (motor swap or not)

2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

LSJ reliability past 120K miles (motor swap or not)

Old 11-26-2018, 11:06 PM
  #1  
New Member
Thread Starter
 
Join Date: 11-26-17
Location: NV
Posts: 8
Thanked 0 Times in 0 Posts
LSJ reliability past 120K miles (motor swap or not)

Story time! So I posted awhile back about a clutch because I am getting chattering and pedal vibration when downshifting and if I push the pedal fully in when upshifting. For a while I decided I was going to get a new or used car. I cannot justify 400-500 a month when I do love driving this car. The prospect of replacing the motor with the clutch came up as it seems the clutch job already has the car apart. I would like to stay on the M62 for now as it seems "fast enough" right now and I dont want to go turbo and grenade my transmission. The current motor has 120K on it and is not showing any outside signs of weakness other than there is oil build up around the valve cover on the passenger side. Not dripping or anything, but it has built up. As far as I know, I have GM stage 2, dual pass, front mount zzp HE, shorty header (might be pacesetter), exhaust, and cut out snorkel on the airbox. Not sure what else as it was bought used from a dealer.

Anyways, I have money right now that I might not have later. The current motor would need new water pump and timing chain at a minimum (which I would have to buy for the shortblock too) along with the new clutch. Probably have the head rebuilt while I am at it if is that time. I was thinking about doing a compression/leakdown test, but that is like 20% the cost of the LSJ shortblock on ZZP. This car will be my daily driver, so putting money into it now and driving for another X amount of years makes sense. I would also be adding a few more things exhaust wise, opt b, mounts. Main question is, should I look into replacing the motor or should it be good for awhile? Only maintenance I have really been doing is regular oil changes with mobil1. There will probably be more posts after this related but going into other details.
calibrato is offline  
Old 11-27-2018, 07:24 AM
  #2  
Senior Member
iTrader: (3)
 
Join Date: 06-13-12
Location: Indiana
Posts: 5,064
Thanked 254 Times in 239 Posts
Get yourself a cheap compression gauge and see what kind of compression you currently have. If its ok I would just do the the chain and water pump. No need to spend money on a short block if you don't need it. Going over the head is a good idea.
It all comes down to how long you are going to keep it.
63 Nova SS is offline  
Old 11-27-2018, 12:50 PM
  #3  
Senior Member
iTrader: (2)
 
Join Date: 01-10-11
Posts: 3,862
Thanked 15 Times in 12 Posts
as long as it's been taken care of there's no reason to swap it out. Heck i didn't even turbo my car till i was over 200k.
armcclure is offline  
Old 11-27-2018, 12:57 PM
  #4  
N*gga Kevin
iTrader: (4)
 
Join Date: 01-21-11
Location: Lochbuie, Colorado
Posts: 12,948
Thanked 157 Times in 124 Posts
I bought an LSJ that needed an engine. However, it was due to the PO's mechanic being drunk and breaking a piece of the block the timing chain guide goes into. He also tried to RTV the HG surface...but that bitch still ran.

It had 153k on it.

chassis has 177k on it now, original transmission and everything else. and i Put a used engine in that had 100k on it. it runs fine. no reason to think you cant get over 200k as long as its maintained well. LSJ engines are stout.
leemanfor is offline  
Old 11-27-2018, 06:16 PM
  #5  
Super Moderator
iTrader: (3)
 
mrbelvedere's Avatar
 
Join Date: 12-04-05
Location: KY
Posts: 8,123
Thanked 45 Times in 39 Posts
if the water pump is not leaking don't mess with it
mrbelvedere is offline  
Old 11-27-2018, 09:00 PM
  #6  
New Member
Thread Starter
 
Join Date: 11-26-17
Location: NV
Posts: 8
Thanked 0 Times in 0 Posts
I appreciate the real world examples. I did look at a few threads before this, but it was more opinion than anything. The only reason I was thinking about the water pump is that about 18 months ago I bottomed out the front in a drainage dip leading into a steep incline. It blew out the radiator, condenser, and HE. It was all replaced and was running in the 180-190 range during the winter, but here in Vegas during the 110-115 summer it would approach 230-240 on the highway doing 70. I changed out the thermostat twice as it was stuck open and throwing a code. I have read on the forums that 230-240 is normal but it scares me. Unfortunately I can only compare the temps to when I was in Albuquerque and it never seemed to top 190 unless stopped in traffic it would creap up to 210 or so with the A/C off. I thought maybe something might have struck the impeller on the pump when everything broke.
calibrato is offline  
Old 11-28-2018, 01:02 PM
  #7  
N*gga Kevin
iTrader: (4)
 
Join Date: 01-21-11
Location: Lochbuie, Colorado
Posts: 12,948
Thanked 157 Times in 124 Posts
my car does the same thing

I replaced the water pump and resealed it when I did the engine

on 100+ days, the coolant would hit 225 or 230 while driving on the highway.
leemanfor is offline  
Old 11-28-2018, 01:07 PM
  #8  
New Member
Thread Starter
 
Join Date: 11-26-17
Location: NV
Posts: 8
Thanked 0 Times in 0 Posts
Originally Posted by leemanfor View Post
my car does the same thing

I replaced the water pump and resealed it when I did the engine

on 100+ days, the coolant would hit 225 or 230 while driving on the highway.
leemanfor, so the new water pump fixed the issue or still gets hot?
calibrato is offline  
Old 11-28-2018, 01:11 PM
  #9  
N*gga Kevin
iTrader: (4)
 
Join Date: 01-21-11
Location: Lochbuie, Colorado
Posts: 12,948
Thanked 157 Times in 124 Posts
nope. that was after a new waterpump, new thermostat, new timing guides etc. New coolant, new radiator also.
leemanfor is offline  
Old 12-03-2018, 09:06 PM
  #10  
Senior Member
 
chris88z24's Avatar
 
Join Date: 06-03-07
Location: In the garage patching rust holes
Posts: 13,699
Thanks: 0
Thanked 21 Times in 19 Posts
You prob had air in the system. The LSJ cooling system is kind of a pain in the ass to bleed.

I'm at 145000 miles. Changed the timing chain tensioner when the new one came out. Always used full synthetic oil and a good oil filter. You'd be surprised at how much abuse an IC engine can take.
chris88z24 is offline  
Old 12-04-2018, 12:48 PM
  #11  
N*gga Kevin
iTrader: (4)
 
Join Date: 01-21-11
Location: Lochbuie, Colorado
Posts: 12,948
Thanked 157 Times in 124 Posts
yeah i just swapped the thermostat on the wifes LSJ and it was a pain to bleed. it had one major air bubble, and then another one a month later.
leemanfor is offline  
Old 12-04-2018, 09:51 PM
  #12  
Senior Member
 
Join Date: 07-24-17
Location: Oregon
Posts: 501
Thanks: 0
Thanked 3 Times in 3 Posts
mine bleeds itself. never been a problem
Johnny Bliss is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Getaway_Driver
The Lounge
16
05-19-2015 09:01 PM
Getaway_Driver
08-10 SS Turbocharged General Discussion
31
04-22-2015 06:58 AM
20redline
2.2L L61 Performance Tech
6
02-25-2012 01:00 PM
michiganfootball911
Complete Cars
14
03-28-2011 10:23 AM
NJHK
The Lounge
8
12-14-2006 06:56 PM


Thread Tools
Search this Thread
Quick Reply: LSJ reliability past 120K miles (motor swap or not)


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.