307 knock

[kmking]

I currently have a 307 right now , and i just started getting a knock and it sounds like a rod hitting , whats my best solution?
If its cheaper should i just do an engine swap? maybe a olds 350 rocket? If so is it an easy swap?

 

[Minion1186]

depends on the knock,could be an oil pressure problem,or you have worn lifters that can create a friction noise.In the long run yes,307s are worht rebuilding.Olds 350 is a direct swap,you can switch over everything from the 307 (if using the ecm),and depending on how mild the 350 is,you wont have to switch to a stronger transmission and rear.A good stock to mild 350 means you wont have to change over anything big like the rad,rear and transmission.BTW i have an olds 350 for sale for $150 if you're insterested,it'll need a rebuild,but its a good starting point.

 

[FE3X CLONE]

In the long run yes,307s are worht rebuilding.

I think you meant "aren't" worth rebuilding. 😉

If its cheaper should i just do an engine swap? maybe a olds 350 rocket? If so is it an easy swap?

As said, if there truely is something wrong with the 307 then yes, it would be cheaper to just swap to another Olds engine. A 350 or 403 Olds would be a direct bolt-in. A 400/425/455 would also go in with just a bit more work. 😉

 

[Minion1186]

thank you for correcting me,yes they are not worth rebuilding,mine only made 200 horsepower,check out that big thread about them and it'll make you think twice about picking a 307 over a 350 or 403.

 

[pontiacgp]

It could even just be a carbon knock....start the car and slowly pour some water down the carb and see if that cleans the carbon out. If it is a rod bearing you can find out by removing one plug wire at a time with the engine running and when you get the right piston the knock will be quieter or it could be gone