Need help with supposed cracked block on a 96 ss - Chevy Impala SS Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 56 (permalink) Old 02-02-2017, 09:17 AM Thread Starter
Member
 
Join Date: Dec 2016
Posts: 81
 
Need help with supposed cracked block on a 96 ss

Picked up a 1996 impala ss yesterday that supposedly has a cracked block. I need some help to determine if it is really cracked or if it may be something else. The previous owner told me he had top end rebuilt and the motor has lots of new parts including opti and water pump. It cranks and runs the idiot light is flashing says low coolant and runs real rough but it doesn't smoke just really need some guidance or a good idea of what to start checking. I have another 5.7 that I pulled out of a 95 and before swapping them I want to see if it's salvageable or not. Any help would be greatly appreciated

Sent from my SAMSUNG-SM-N920A using Tapatalk
96texasss is offline  
Sponsored Links
Advertisement
 
post #2 of 56 (permalink) Old 02-02-2017, 10:12 AM
Senior Member
 
Join Date: Jan 2001
Location: St. Louis
Posts: 6,251
 
Quote:
Originally Posted by 96texasss View Post
Picked up a 1996 impala ss yesterday that supposedly has a cracked block.

.....I need some help to determine if it is really cracked or if it may be something else.

......It cranks and runs the idiot light is flashing says low coolant and runs real rough but it doesn't smoke just really need some guidance or a good idea of what to start checking. .....
Sent from my SAMSUNG-SM-N920A using Tapatalk
Considering just the useful info, there's a lot left for you to contribute before a worthwhile response.

You surely asked, so what indications exactly did the seller give for her/m to state the block was cracked? Especially since it runs.
If internal, how does/did her/m know it's a crack and not mech. failure? If external, are/was there physical symptoms of a crack - leaking or shooting fluids, staining, visible break?

You may want to fill the AF, find a way to pull codes, and deal with the rough condition. Do you or a friend know how to tell a flattened cam, broke rocker, rod knock or any number of things potentially caused simply by seller's abuse?

That's all I got until you dig more on your own. It's gotta be better use of time and $$ to buy and study a FSM for $50 before swapping a whole motor.

\'96SS SOB: SSRI, Herter Tune, Tri-Y II, SLP SS, 3000 Edge, F/HO bars, METCO extendeds and CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: SS Bars, METCO LCAs, Koni Reds, PowerTrax No-Slip
96 Black is offline  
post #3 of 56 (permalink) Old 02-02-2017, 10:24 AM Thread Starter
Member
 
Join Date: Dec 2016
Posts: 81
 
The guy told me that he had taken it to a shop and that they told him the block was cracked. I was thinking a leak down and then a compression test to see if there is any noticeable difference in the cylinders and or a loss of pressure in the cooling system. I had it on a trailer and when I pulled her off I didn't see any indications of a leak so I was thinking that unless the Crack is internal or so miniscule that it doesn't leak that it could be something different because it runs rough but it runs cranked right up no problems and for 1700 it was a steal so I'm not sure as to what to do or where to begin

Sent from my SAMSUNG-SM-N920A using Tapatalk
96texasss is offline  
 
post #4 of 56 (permalink) Old 02-02-2017, 10:44 AM
Senior Member
 
babywag's Avatar
 
Join Date: Mar 2016
Location: California
Posts: 349
 
Fill it up with distilled water and pressure test system.

Coolant low, no signs of leak on trailer, runs like poo...

Leans towards it dumped coolant/overheated and may now have other issues.
Guy sold it because he didn't want to deal with it, now it's your turn

Just my .02
babywag is offline  
post #5 of 56 (permalink) Old 02-02-2017, 10:48 AM Thread Starter
Member
 
Join Date: Dec 2016
Posts: 81
 
Yea probably lol. But I wasn't to worried I paid 10k for my daily driver in '09 so 1700 and in great shape except the motor and I have another block waiting didn't seem like a deal I could pass up

Sent from my SAMSUNG-SM-N920A using Tapatalk
96texasss is offline  
post #6 of 56 (permalink) Old 02-02-2017, 10:57 AM
Senior Member
 
Join Date: Jan 2001
Location: St. Louis
Posts: 6,251
 
Quote:
Originally Posted by 96texasss View Post
The guy told me that he had taken it to a shop and that they told him the block was cracked. ....

Sent from my SAMSUNG-SM-N920A using Tapatalk
Ok, you know pretty much nothing at this point. It could be anywhere from simple ignorance, incompetence or laziness, up to hopeful charge for teardown/replacement.

And at 3 posts total under your belt you may not realize the perhaps best feature about this forum is the vast intel archived here. My guidance is fill the AF. It might take 5 start cycles for the light to go off - don't worry. Just get all the damn air out of the system. There's search for that. Get to AZ/O'R or Advance to read codes and deal with those first. There's search for every code you can think of. Then, attend to the thousand normal maint. and upkeep expected for a 20-year old car. Hoses, wires, plugs, sensors, grounds, fuel system, filters. There's search for all that. And learn all the acronyms that can cause headaches, IAC, FPR, TPS, ECT, EGR, ICM, IC, EVAP. Yep, there's search for those as well. Along with all that, there's numerous stickies on 'rough idle/running'. Search them all.

EDIT: Your last above noted. But all insight still holds. 1,700 not bad. I'd still establish what's really the issue before swapping the motor - even if free. You'd hate to do that if it was only a giant overheating that fried a hose/wire/component causing rough running.

\'96SS SOB: SSRI, Herter Tune, Tri-Y II, SLP SS, 3000 Edge, F/HO bars, METCO extendeds and CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: SS Bars, METCO LCAs, Koni Reds, PowerTrax No-Slip

Last edited by 96 Black; 02-02-2017 at 11:04 AM.
96 Black is offline  
post #7 of 56 (permalink) Old 02-02-2017, 10:59 AM Thread Starter
Member
 
Join Date: Dec 2016
Posts: 81
 
What I was thinking just wanted a second opinion before I got started I go to school during the week so I don't really have the time until Saturday's to do troubleshooting unless the daily breaks down

Sent from my SAMSUNG-SM-N920A using Tapatalk
96texasss is offline  
post #8 of 56 (permalink) Old 02-02-2017, 02:40 PM
Senior Member
 
Join Date: Apr 2001
Location: Moorpark, CA
Posts: 7,065
 
Garage
OP

any "2nd opinion" from any of us based on what you post (somewhat second hand info from PO) would be just a "guess"

As noted most auto part stores have OBD 2 code reader they loan out. You can buy them for $20 or so at places like Harbor Freight

Cracked block....not very common but sounds like PO got in over his head on mods, may have driven the motor to hard or it over heated severely which can cause head or block damage

Do a cooling system leak test (you usually can get that as a loan a tool thing) also and scan for codes and google wtf those codes mean and focus on whatever those pretain to.

go buy a $1 jug, or two, of distilled water for the coolant pressure test. No need spending $ on coolant until you FIO if coolant system, heads or block is leaking water somewhere

\'96 BBB 383/T-56
BALLSS is offline  
post #9 of 56 (permalink) Old 02-02-2017, 02:49 PM Thread Starter
Member
 
Join Date: Dec 2016
Posts: 81
 
Yea appreciate all the help tho the po didn't seem the type to push her to the limit but you never know these days either way she is a solid project and a steal at 1700

Sent from my SAMSUNG-SM-N920A using Tapatalk
96texasss is offline  
post #10 of 56 (permalink) Old 02-03-2017, 08:21 PM Thread Starter
Member
 
Join Date: Dec 2016
Posts: 81
 
Ok update just put obd2 and it's got random misfire oil looks a little milky but can't really tell in the dark gonna do a leak down on it tomorrow. How can I find The misfire?

Sent from my SAMSUNG-SM-N920A using Tapatalk
96texasss is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Impala SS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not 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 On
Pingbacks are On
Refbacks are On

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