how do you tell what size engine

[rjp0228]

hi i just got a 85 cutlass from a lady see knows nothing about the car it was going to be here husbans car he was going to build but hes no longer around i checked the vin it is a v-6 vin but has a v-8 so i know it was swapped it is a very good swap looks the same as my frinds 307 cutlass so how can i tell if this is a 307 350 or what thanks

 

[dan2286]

hi i just got a 85 cutlass from a lady see knows nothing about the car it was going to be here husbans car he was going to build but hes no longer around i checked the vin it is a v-6 vin but has a v-8 so i know it was swapped it is a very good swap looks the same as my frinds 307 cutlass so how can i tell if this is a 307 350 or what thanks

Do you know if it is an Olds or Chevy engine? If its Olds it will hava an oil fill tube behind the water pump. Chevy will have the oil fill on the valve covers. If it is an Olds, there will be a number to the left of the oil fill tube, let us know what it is. If it is a Chevy, I am not sure how to tell what engine it is but im sure someone will chime in.

 

[rjp0228]

i looked it is a olds engine but there was no number the only numbers i could find were on the valve cover 0045062 also a7 on heads

 

[dogsht]

If it does not have a big 403 in the side of the block its a 350/330/307/260. If its a slow turd its a 307 or 260 probably a 307. If it runs good its probably a 350/330 most likely a 350. Hope that helps some.

 

[joe_padavano]

i looked it is a olds engine but there was no number the only numbers i could find were on the valve cover 0045062 also a7 on heads

If it's an Olds engine, there WILL be a casting number on the shelf above the water pump, next to the oil fill tube. Scrape away any crud and look again.

 

[rjp0228]

ok i found it lot of crap on it 6509gm5.0L

 

[maliburacinfreak]

with it ending in 5.0L, id assume its a 307

 

[joe_padavano]

with it ending in 5.0L, id assume its a 307

Correct. It's an Olds 307. Probably original to the car.

 

[85 Cutlass Brougham]

Some Chevy 305's had a similar marking with the 5.0L designator as well. A pic of the engine would clear it up.

 

[rjp0228]

ok ill try to get a pic up but thanks alot for the help guys