Will the real LT engine please stand up
Thread Starter
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
Will the real LT engine please stand up
Hello , Newbie Old bee here ,, 
Engine specific Id needed here
Briefly .. picked up this Maybe LT1 / LT4 engine less all frontal accessories
especially the Crank Hub , dampener and pulley
once I can Id the exact model and year of the beast .. correct crank hub and dampener and pulley along with all the accessaries and brackets can be purchased ..
Engine Block # 10125327 and #588 and # GM 5.7 LG SGI and G1 and 327
numbers are in various places
Heads #13061
Intake Rochester # 1709114 and 1296 and KNM 12
Intake has EGR on rear of intake
Looked into oil fill cap on valve cover and saw No
casting numbers on
the head .
The Rockers are stamped steel - found -No Rollers rockers
OIL Pan pulled to reveal 4 Bolt Main
with that said : What LT engine is
What year ?
What car did it come from
this info will help me choose the correct accessary package and what wiring harness to look for
help is bliss concioussness .. indulge me if you will
Engine specific Id needed here
Briefly .. picked up this Maybe LT1 / LT4 engine less all frontal accessories
especially the Crank Hub , dampener and pulley
once I can Id the exact model and year of the beast .. correct crank hub and dampener and pulley along with all the accessaries and brackets can be purchased ..
Engine Block # 10125327 and #588 and # GM 5.7 LG SGI and G1 and 327
numbers are in various places
Heads #13061
Intake Rochester # 1709114 and 1296 and KNM 12
Intake has EGR on rear of intake
Looked into oil fill cap on valve cover and saw No
casting numbers on the head .
The Rockers are stamped steel - found -No Rollers rockers
OIL Pan pulled to reveal 4 Bolt Main
with that said : What LT engine is
What year ?
What car did it come from
this info will help me choose the correct accessary package and what wiring harness to look for
help is bliss concioussness .. indulge me if you will
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
EGR on intake.....t sounds like you have an LT1. How about some pics
Good news is without the front accessories you have no excuse not to install a 94-96 B-body or 95-up Y and F body cover with vented opti....
Heres a link to a site that will help you id a real LT4 intake
GM Head casting numbers link
Good news is without the front accessories you have no excuse not to install a 94-96 B-body or 95-up Y and F body cover with vented opti....
Heres a link to a site that will help you id a real LT4 intake
GM Head casting numbers link
Last edited by aboatguy; Mar 17, 2013 at 05:47 PM.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
I didn't go back to your other thread the answer is there.. 94 or later corvette valve covers on it if it has a vented opti.... probably a 95 or 96..... if theres a crank position sensor (CPS) boss its probably a 96
Sorry brother No matter how many times you ask, or threads you start... it won't turn into a LT4 from the pick it looks like the hub for the damper is there....meaning a C4 damper will work. assuming you really have a four bolt lower end....
The real question is what accesory package will fit in your car.. I believe the radiator and other engine compartment items are in a different location than the later corvettes. I'd see about fitting the current accesories on the LT1 and getting a balancer that lets that happen (LT1 is normal SBC neutrally balanced front... with normal 1pc RMS externally balanced rear.....
You are in California I believe you'll have to meet LT1 smog rules if you perform this swap
Do you have a wiring harness and ECM/PCM to run this sucker?
the LT1 exhaust IOT meet smog?
Sorry brother No matter how many times you ask, or threads you start... it won't turn into a LT4 from the pick it looks like the hub for the damper is there....meaning a C4 damper will work. assuming you really have a four bolt lower end....
The real question is what accesory package will fit in your car.. I believe the radiator and other engine compartment items are in a different location than the later corvettes. I'd see about fitting the current accesories on the LT1 and getting a balancer that lets that happen (LT1 is normal SBC neutrally balanced front... with normal 1pc RMS externally balanced rear.....
You are in California I believe you'll have to meet LT1 smog rules if you perform this swap
Do you have a wiring harness and ECM/PCM to run this sucker?
the LT1 exhaust IOT meet smog?
Last edited by aboatguy; Mar 17, 2013 at 06:08 PM.
Team Owner
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
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The block number is the same used for all LT engines from 93 to 96.
Based on the MAF, it could be a 94 or above
It is not a LT4
The head serial number you posted is not listed for LT.
The 94-96 LT heads had
94-96: 10207643
96 late production: 12551561
Based on the MAF, it could be a 94 or above
It is not a LT4
The head serial number you posted is not listed for LT.
The 94-96 LT heads had
94-96: 10207643
96 late production: 12551561
Thread Starter
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
I didn't go back to your other thread the answer is there.. 94 or later corvette valve covers on it if it has a vented opti.... probably a 95 or 96..... if theres a crank position sensor (CPS) boss its probably a 96
Sorry brother No matter how many times you ask, or threads you start... it won't turn into a LT4 from the pick it looks like the hub for the damper is there....meaning a C4 damper will work. assuming you really have a four bolt lower end....
The real question is what accesory package will fit in your car.. I believe the radiator and other engine compartment items are in a different location than the later corvettes. I'd see about fitting the current accesories on the LT1 and getting a balancer that lets that happen (LT1 is normal SBC neutrally balanced front... with normal 1pc RMS externally balanced rear.....
You are in California I believe you'll have to meet LT1 smog rules if you perform this swap
Do you have a wiring harness and ECM/PCM to run this sucker?
the LT1 exhaust IOT meet smog?
Sorry brother No matter how many times you ask, or threads you start... it won't turn into a LT4 from the pick it looks like the hub for the damper is there....meaning a C4 damper will work. assuming you really have a four bolt lower end....
The real question is what accesory package will fit in your car.. I believe the radiator and other engine compartment items are in a different location than the later corvettes. I'd see about fitting the current accesories on the LT1 and getting a balancer that lets that happen (LT1 is normal SBC neutrally balanced front... with normal 1pc RMS externally balanced rear.....
You are in California I believe you'll have to meet LT1 smog rules if you perform this swap
Do you have a wiring harness and ECM/PCM to run this sucker?
the LT1 exhaust IOT meet smog?
Pin pointing the exact year is now my Querry .. and you have certainly helped in getting me straight .. thanks for all your time and effort ... I read and reread your thread
so here are a few questio's cause Im slow to get things quickly at times
fact is , yes.. its a 4 bolt .. checked it
Yes it has that plugin receptical at the right front lower side of the timing cover
there is no crank Hub .. certified .. wish it did
fact .. egr is on rear of intake .. for whatever it means
There are no current accessariies except for the Alternator and large aluminum bracket
It mounts the alt hi and on right side ... I have no other pieces unfortunately
Fact : you Got It Right ... My Real quest is what accessary set up to run .. You hit the nail on the Head .. Incredible Thanks
Im a bit lost when you talk about dealing with the optispark setup and how to get exactly what I need to make it happen .. what is RMS and or where is it located ?
Here is where I need serious input if you will indulge me ... bleessed are the Senile and stupidz .. hello !
my cross fire engine has all the frontal gear .. the crank hub isnt even close .. I just checked that one for sure .. firstly , it's way short ... all good but no luck
your mentioning that I maybe could use the dampener .. on this LT1 unit .. or am I not understanding ya here
the new thread I started related to exactly ID ing the lT1 engines year and what it car it came from .. thats it
Im older and love to chat via tele ... call me if ya can
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Oh yeah .. that wet dream of it being an LT4 is long gone .. Bumped .. so moving ahead here ... I'm very satisfied with a LT1 reality check .. all good !
Pin pointing the exact year is now my Querry .. and you have certainly helped in getting me straight .. thanks for all your time and effort ... I read and reread your thread
so here are a few questio's cause Im slow to get things quickly at times
fact is , yes.. its a 4 bolt .. checked it Good Should be C4
Yes it has that plugin receptical at the right front lower side of the timing cover
there is no crank Hub .. certified .. wish it did (sound like 96 meaning OBDII whats that mean in California for CARB?)
fact .. egr is on rear of intake .. for whatever it means (LT4 = no EGR)
There are no current accessariies except for the Alternator and large aluminum bracket
It mounts the alt hi and on right side ... I have no other pieces unfortunately (easy day to pick what you want)
Fact : you Got It Right ... My Real quest is what accessary set up to run .. You hit the nail on the Head .. Incredible Thanks
Im a bit lost when you talk about dealing with the optispark setup and how to get exactly what I need to make it happen .. what is RMS and or where is it located ? (REAR MAIN SEAL mixed balance engine internally balanced front, external rear balance so theres a little bobweight on flex plate or flywheel)
Here is where I need serious input if you will indulge me ... bleessed are the Senile and stupidz .. hello !
my cross fire engine has all the frontal gear .. the crank hub isnt even close .. I just checked that one for sure .. firstly , it's way short ... all good but no luck (need LT1 hub and balancer....)
your mentioning that I maybe could use the dampener .. on this LT1 unit .. or am I not understanding ya here
the new thread I started related to exactly ID ing the lT1 engines year and what it car it came from .. thats it
Im older and love to chat via tele ... call me if ya can
Pin pointing the exact year is now my Querry .. and you have certainly helped in getting me straight .. thanks for all your time and effort ... I read and reread your thread
so here are a few questio's cause Im slow to get things quickly at times
fact is , yes.. its a 4 bolt .. checked it Good Should be C4
Yes it has that plugin receptical at the right front lower side of the timing cover
there is no crank Hub .. certified .. wish it did (sound like 96 meaning OBDII whats that mean in California for CARB?)
fact .. egr is on rear of intake .. for whatever it means (LT4 = no EGR)
There are no current accessariies except for the Alternator and large aluminum bracket
It mounts the alt hi and on right side ... I have no other pieces unfortunately (easy day to pick what you want)
Fact : you Got It Right ... My Real quest is what accessary set up to run .. You hit the nail on the Head .. Incredible Thanks
Im a bit lost when you talk about dealing with the optispark setup and how to get exactly what I need to make it happen .. what is RMS and or where is it located ? (REAR MAIN SEAL mixed balance engine internally balanced front, external rear balance so theres a little bobweight on flex plate or flywheel)
Here is where I need serious input if you will indulge me ... bleessed are the Senile and stupidz .. hello !
my cross fire engine has all the frontal gear .. the crank hub isnt even close .. I just checked that one for sure .. firstly , it's way short ... all good but no luck (need LT1 hub and balancer....)
your mentioning that I maybe could use the dampener .. on this LT1 unit .. or am I not understanding ya here
the new thread I started related to exactly ID ing the lT1 engines year and what it car it came from .. thats it
Im older and love to chat via tele ... call me if ya can
The corvette shortblock from 92-96 has the same stats on the rotating assembly that accessories are close so I'm saying chose the accessories you want/need and work from there. The 96 has a Crank Position sensor so the hub is a little bit shorter IOT make up for the space the reluctor takes up on the front of the engine..
RMS is rear main seal LT1 has a 1 piece rear main seal just like the L98 and other late model SBC engines.
If I were in your shoes (Kalifornia) I'd think real hard about fixing the Cross fire or installing a regular SBC based engine before messing with a GEN II (LTX).. or if I was up for fighting CARB I'd shoot for a 6.0 Gen IV or larger...
Last edited by aboatguy; Mar 17, 2013 at 08:49 PM.
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Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Looking again at your photos, there is no doubt in my C4 mind it is a LT1 engine. It has the Opti vacuum line so that would make it a 95 or 96.
I'm not sure if the 96 LT1 has the CPS, if it has one a 96 would have a sensor on the bottom of the timing chain cover plate.
One thing for sure, all 96 LT1 were automatics and that one came from an automatic.
I'm not sure if the 96 LT1 has the CPS, if it has one a 96 would have a sensor on the bottom of the timing chain cover plate.
One thing for sure, all 96 LT1 were automatics and that one came from an automatic.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Your in Kali, what are the rules for installing a 96 LT1 in an 84... does it need to meet OBDII rules? Since OBDII is 96 only that may be a tough row to hoe..
I hope I misunderstand CARB requirements, so glad my inspection consists of car braking without hitting wall and all the external lights working....
Mike
Thread Starter
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
No Numz ...
This LT block has no machined surfaced areas with Hand Stampings
It does have casting Numz at different locations ..whats with that one
How else can We determine the exact year
is the casting num on the rear shelf just tell that its 95 or 96 and no more .. # 10125327
It does have casting Numz at different locations ..whats with that one
How else can We determine the exact year
is the casting num on the rear shelf just tell that its 95 or 96 and no more .. # 10125327
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Should be on the front on the pad infront of the head..
Safety Car
Joined: Jan 2004
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Thread Starter
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
I know by now that it is in fact an LT engine and more than not an LT1 unit
and most likely a 95 or 96 ... does the odd intake snoot give any indications to what car it comes out of .. Hmm ?
The only thing that matters to me at this point is putting the correct crnk hub (keyed) , balance and 6 groove pulley .. than I can try to find the rest of the correct accessary package as advised .. so Wassup ?
Thread Starter
Racer
Joined: Sep 2012
Posts: 259
Likes: 0
From: Montclair CA
No Cranky here ...
truth is .. No .. the pics above are not mine ... a Forum neighbor posted them for Serial number location reference
My pics are the crummy ones ,,, way way up .. pics were taken minutes after I purchased the unit .. Hence.. filthy dirty engine and night shot of the LT1
while your looking .. let me me know if you recognize the Odd shape intake boot to what car this engine came from .. indulge me
I received a welcomed crash course in the last 24 ..
My present and only concerns now are knowing if a 95 or 96 Crank hub are one and the same ... Reason ... once I confirm this .. I can pursue the search for the correct accessary package to fit properly and fit into my My 84 C4 vette
Race Director
Joined: Jan 2002
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From: O'Fallon Missouri
They are different. The 96 hub is shorter to make room for the CPS reluctor wheel. But, when installed on their approriate model year they will both be in the same position as far as accessary alignment.
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana