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Shady mechanic?

This is a discussion on Shady mechanic? within the Internal Engine forums, part of the LSx Technical Help Section category; I recently had quite a bit of work done on my car including a head/cam swap. My car is a ...

  1. #1
    Junior Member azbird's Avatar
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    2001 Firebird Formula

    Shady mechanic?

    I recently had quite a bit of work done on my car including a head/cam swap. My car is a 2001 Firebird Formula. I had requested a custom grind cam and ls6 heads which is what I paid for and had installed. About a week later I was cleaning my engine bay and noticed the casting number on the passenger side head was shaved off and the driver side read 853, ls1 heads. I just wanted to make sure my information is correct before I accuse my mechanic of anything shady, and if I am correct what type of action do I pursue?

  2. #2
    JMAC Racing WS6ICK's Avatar
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    2000 Trans Am WS6 LS6
    2006 GTO LS2

    As far as I know LS6 heads are 243's.
    2010 Camaro
    2006 GTO, LS2, 1 of 475
    2009 Chevy Silverado


  3. #3
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    SOM
    1998 T.A.

    Quote Originally Posted by WS6ICK View Post
    As far as I know LS6 heads are 243's.
    You are correct sir. 853's are LS1 heads.

  4. #4
    cutting and welding mark21742's Avatar
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    Quote Originally Posted by SOMbitch View Post
    You are correct sir. 853's are LS1 heads.
    true. if I'm correct they are off of a 5.3l ls1 truck motor. if ported with bigger valves put in they are still a very good budget head and bump you up about .5 on the compression, but stock they don't flow as good with smaller ports and valves

  5. #5
    Member supaxero's Avatar
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    metallic pewter
    2000 Trans Am WS6

    That's sucks! If your not the one doing the work, Its a good idea to purchase the parts you want put on your ride and find some you can trust to install it.

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    SOM
    1998 T.A.

    5.3 head casting #'s = 706/895/ and 862 which was also used on some 4.8's.

    LS1 casting #'s are 806 (the perimeter bolt heads) 853/ 241. 241's used a better casting process and will make a couple more ponies stock than 853's but once ported they are the same.

    243's are the LS6/ LS2 heads and the most desirable factory casting.

    The 5.3 truck motors do not carry the LS1 designation. Not sure what the Aluminum 5.3's are called but the 5.3 iron block in my Z-71 is designated LM7 for instance.
    Last edited by SOMbitch; 12-05-2008 at 08:24 AM.

  7. #7
    King 0f n00bz shady milkman's Avatar
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    why dont you like my mechanic work ?

  8. #8
    Member blk_jaws's Avatar
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    yep 853 are LS1 heads I have them, the LS6 heads are 243. He's screwing you, or he dont know LS1's that good
    SLP LT's, SLP High Flow Cats, 3" Flowmaster CB, Comp Cam, SLP Lid, LS6 Intake, BBK 80mm TB, SFC, Ram Air HO Hood, Lowered, Torq Thrust II's

  9. #9
    cutting and welding mark21742's Avatar
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    Quote Originally Posted by SOMbitch View Post
    5.3 head casting #'s = 706/895/ and 862 which was also used on some 4.8's.

    LS1 casting #'s are 806 (the perimeter bolt heads) 853/ 241. 241's used a better casting process and will make a couple more ponies stock than 853's but once ported they are the same.

    243's are the LS6/ LS2 heads and the most desirable factory casting.

    The 5.3 truck motors do not carry the LS1 designation. Not sure what the Aluminum 5.3's are called but the 5.3 iron block in my Z-71 is designated LM7 for instance.
    hey SOMbitch thanks for the part # info

  10. #10
    Member chevyss1234's Avatar
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    i don't know a ton about heads but 243 is an ls6 head. If the head doesn't have that number it is not an ls6 head. there's a bunch of threads sayin that's the 99-00 camaro ls1 head so someone owe's you some money. i'd make him pay for 243 heads and the installation at a different shop. oh i'd be so mad man.
    What is the diff.

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    SOM
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    Quote Originally Posted by mark21742 View Post
    hey SOMbitch thanks for the part # info
    Glad to help!!

  12. #12
    Junior Member azbird's Avatar
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    Wow, you guys are awesome. Im headed down to his shop now and I will keep you updated on what goes down. Im gonna see what excuses he has and tell him to pay for 243 heads and installation somewhere else like what was suggested.

  13. #13
    cutting and welding mark21742's Avatar
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    Quote Originally Posted by SOMbitch View Post
    Glad to help!!
    theare just too damb many part numbers to remember around here lol

  14. #14
    🤔 11s. blackbirdbrain89's Avatar
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    black trans am
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    watch out for some 4.8/5.3 heads, the have a little bullet looking logo under the rocker rail. they some times leek coolent in to the oil

  15. #15
    formally 01 T/A 0verkill's Avatar
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    "Arrest Me Red"
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    always ask for you old parts back and mark them. that way you know that they did the work.

  16. #16
    Member chevyss1234's Avatar
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    well i think the mechanic actually downgraded his heads if there are now 853 heads on there. So there were still a set of heads to give back him. I'll bet the 853 heads are ported or something, and the mechanic figured there would be some performance gain and you'd never know that they weren't the actual ones performance heads you ordered or asked for, i dunno....

    azbird whatever happened?

  17. #17
    Senior Member JaycenK's Avatar
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    any news yet?

  18. #18
    Sold: LS1 '85 El Camino ls1camino's Avatar
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    2000 Grand Prix GTP
    2000 Trans Am WS6 M6

    This is why I do all my own work...

    IF I was to ever have a mechanic work on my car, I would provide the mechanic with the parts...too many people out there cutting corners and scamming people so they can make some extra money.

  19. #19
    formally 01 T/A 0verkill's Avatar
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    Quote Originally Posted by ls1camino View Post
    This is why I do all my own work...

    IF I was to ever have a mechanic work on my car, I would provide the mechanic with the parts...too many people out there cutting corners and scamming people so they can make some extra money.
    im the same way i get the parts i want and get the old stuff back so i know its the stuff i want on it

  20. #20
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by ls1camino View Post
    This is why I do all my own work...

    IF I was to ever have a mechanic work on my car, I would provide the mechanic with the parts...too many people out there cutting corners and scamming people so they can make some extra money.
    x2

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