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1986 Firebird Engine How? Rate Topic: -----

#1 User is offline   86 Firebird 305 

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  • First Name:Johnny
  • City:San Jose
  • State or Province:CA
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  • Interests:17 years old. Looking for good info to keep my Bird running strong for years to come. Ready to learn.
    San Jose, Ca
  • Year: 1986
  • Make: Pontiac
  • Model: Firebird
  • Engine: 305 5.0L
  • Transmission: Manual 5 Speed

Posted 27 July 2010 - 01:18 AM

How can I tell if I have the Engine; LG4 rated 155 HP or the L69 HO rated 190 HP?
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#2 User is offline   FBN Firebird Nation 

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Posted 27 July 2010 - 06:43 AM

There should be a code on the front of the engine block, below the right cylinder head. If you can post that code, I can tell you what engine you have. :12EMOTICHEERS:
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#3 User is offline   1tinindian 

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  • First Name:Leon
  • City:Rockford,Iowa
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  • Year: 1979
  • Make: Pontiac
  • Model: Trans Am
  • Engine: 403
  • Transmission: TH-350

Posted 27 July 2010 - 07:40 AM

I can't tell from youir information if you have a Trans Am or not.

If not, then it's the LG4, as the L69 was on a VERY limited use basis in 1986, and ONLY in the Trans Am.

IF YOU DO HAVE A t/a AND IT'S ALL STOCK and you think it might be an HO car, IT SHOULD HAVE A DUAL SNORKLE AIR CLEANER with the 5.0 Liter HO decal on it.

Sorry for the caps.

But like Bob said, check the VIN .

Leon
1979 Pontiac Firebird Trans Am
1983 Pontiac Firebird Trans Am
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#4 User is offline   jj74sd455 

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  • City:topeka
  • State or Province:KS
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  • Interests:pulling chevy motors out and putting pontiac motors in!
  • Year: 1977
  • Make: pontiac
  • Model: esprit
  • Engine: 400
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Posted 27 July 2010 - 10:18 AM

8th character of your vin code will be G or H. G=L69HO, H=LG4
PONTIAC POWER RULES!
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