Hommystattoo

Anyone know the float hight for the rochester 4barrel from a 1964 oldsmobile 88 394 high compression engine.

Vintage Chief

What is the Model # of the Q-Jet? I don't know directly, but I know of several resources each based upon Model Number which may help to narrow it down.

nsnarsk65cutlass

If original, it would be a 4gc,need the carb number.

Vintage Chief

If it's the 4GC here's the manual. You'll need to review it for yourself, I don't know what page(s) the float adjustment is located.

Hommystattoo

Let me check and see if i can find the carb number on it.

Vintage Chief

Float adjustments are located past page 16 - towards the end of the service manual. Be aware of the two types of float shapes.

Hommystattoo

Thanks chief.
my carb started to leak some fuel from my carb so i just want to check the float hight and give it a good cleaning see if that stops it from leaking.

Vintage Chief

If it's an original 4GC, I believe it has a tag.

Vintage Chief

Often (Sometimes) the tag is no longer attached. In this case look for four numbers stamped onto the top of the carburetor in one of the four corners - you may need to clean it off good. Those four numbers will be the last four numbers of the Model Number of the carburetor. Add the number '700' to the front of those four numbers and that will tell you the number of your carburetor e.g. 700xxxx

If you're going to clean it all up, you might consider a rebuild kit. Rebuild kits are available for the 4GC and they're quite easy to do yourself.

Hommystattoo

Yeah my original carburetor is being rebuilt that one did have the tag on top of the carburetor. I ended up taking it to sparkys carburetor rebuilds his located in Wisconsin.
I ended buying a similar 4 barrel rochester from a guy in Florida same engine and year car just different model. Got it from ebay i cleaned it up put it on the car just so i can drive it around while my original one is getting rebuilt.
its running okay but started to leak fuel.

Charlie Jones

Here's a thread on re-building a 4GC carb .
How to ; Rebuilding a Rochester 4GC carb - ClassicOldsmobile.com
Not hard to do , I did my first one when I was about 16 .