ClassicOldsmobile.com - General Questions

Battery for Cutlass S 350 4V

w1po — Thu, 14 May 2026 14:59:00 GMT

Anyone have the correct battery size for a 1972 Cutlass S 350 cu in? Battery group in there now is a 27F which I do not think is correct. Looking for recommendations please.
Dan

Starting peculiarities Rochester quadrajet

Gerryeuph — Thu, 14 May 2026 11:49:53 GMT

Hey guys, I have an 82 Oldsmobile 98 with the 307 engine and a Rochester quadrajet, the earlier mechanical version, not the electronic feedback carburetor. The first start of the day can be an adventure with my car: if the temperature is below 0� c (32 Fahrenheit) the usual starting procedure which is to push the gas pedal down to the floor and release it works very well, with the engine on high idle and then I can step it down easily as it warms up. When the outside temperature is above 15� c, I don't have to touch the pedal at all the engine starts and runs at normal idle. The big issue is in between 0 Celsius and 10� Celsius. I push the pedal down and release. The engine starts and immediately dies, then I have to go through a whole process of pumping the pedal, waiting and cranking until the engine finally starts to catch. If I don't touch the pedal, the engine won't catch at all. Is there something wrong with my carburetor or is this just a peculiarity of this type of carb? Is there anything I can do in those spring and fall weather days to get the engine to start without going through a whole process of pumping and cranking?

1970 New Front Light Harness and Rear Lights Won't Work

WTHIRTY1 — Tue, 12 May 2026 18:30:15 GMT

Assuming it's a ground issue but here's what I'm working with. 1970 Cutlass Supreme. Installed a new light harness. Removed the old harness and noticed that two of the four ground wires were grounded to the front bumper brackets. My other cars all have the grounds going to the core support - two wires grounded on each side of the core support versus one to the core support on each side and one to the front bumper bracket. Is it possible that there is a ground issue and it would be impacting the rear lights? The rear brake lights work without issue - just not the tail lights themselves at night.

N93 aluminum or magnesium disc

mlawrence — Mon, 11 May 2026 19:29:03 GMT

I have a set of N 93 wheels and caps. I�ve had the rims refinished and they turned out very nice and the center caps are in nice shape too. The aluminum or magnesium center sections are heavily oxidized and I wanna have them restored to original.
I am trying to find a picture of what the original factory disc look like so I can take to the restoration shop. Does anyone have a picture of OEM disc or nowhere where I can find a picture.
I�m gonna try and attach a picture. Mike L.

EGR valve plate need helo finding

Cobean469 — Fri, 08 May 2026 01:21:12 GMT

Howdy yall, I need a hand finding a EGR delete plate for my engine. Thanksabunch!!
Part #

17075690

Carburetor Float Height

Bigmikey65 — Thu, 07 May 2026 00:54:47 GMT

What is the recommended carburetor float adjustment height for a Rochester Quadrajet 7040256 ? I am rebuilding the carb and it will be back on my stock engine �70 W30 4 speed.

Trim Tag Decode Help

72442W-304speed — Tue, 05 May 2026 23:19:16 GMT

Can anyone help me decode this Trim Tag for a 1968 442? Thanks in advance!!!!!

machine shop

Ribber Rat — Tue, 05 May 2026 05:45:45 GMT

Not sure of correct spot, Any one know what happened or how to get ahold Dave Freak cylinder Head Service was in Paddock Lake Wisconsin ? Thanks

1992 98 window trim question

deaddds — Sat, 02 May 2026 00:20:53 GMT

Anybody have an idea how these window edge metal wrap around pieces are removed? I was going to pull these from a parts car and redo for my driver but can�t figure out how to get them off without dicking them up. Not sure if it�s just smarter to paint the ones already on my driver in situ.

Replacement Air Filter

piperman60 — Fri, 01 May 2026 01:35:40 GMT

Hello all. I hope everyone is well, Just had a question if that's okay, I'm trying to find a replacement air filter for my 58 Oldsmobile, The one i have is a Purolator AFP-20, would anyone know the equivalent, replacement if possible? Many Thanks , Ray.

1970 Cutlass Supreme Convertible Top Issues - Video

WTHIRTY1 — Thu, 30 Apr 2026 21:27:07 GMT

Any idea what might be causing the violent “pop” on this?

Proper bolt for alternator bracket

jimcutlass — Thu, 30 Apr 2026 20:33:59 GMT

Need input on proper bolt used here where my negative cable is mounted to..when I adjust alternator belt for tightness it gets in the way
from what I have read also the neg cable is supposed to go down to the block�car is a 69 cutlass s with ac.. thanks

64 Ninety Eight rear suspension bushings

Tyroma — Tue, 28 Apr 2026 13:43:39 GMT

Hey Gang!

I want to tighten up the rear suspension in my 1964 Ninety Eight. I am looking for some bushing options.
I have checked all of my usual parts sources with negative results.
I've done some searching on this forum, and haven't found a clear answer.

So, here goes (...Charlie and Joe, I'm looking in your direction...)
Does anyone carry a set of rear suspension bushings for the Ninety Eight? If so, who?
If not, is there a set that crosses over from another car (ie. Chev/Buick/Caddilac)?

I don't really want to resort to a custom setup (ie. Hotchkis). This is a cruiser, not a pro-tourer or track car.

Any direction would be great

Thanks!

Ty

1970 442 power window install questions

Jungle Cat — Wed, 22 Apr 2026 00:51:15 GMT

I have some questions on the installation of power windows in my 1970 442. I believe 71 is the same. My car is coming apart so now is the time. All convertibles deserve power windows. I purchased a nice set from a member here. I was cleaning and re taping the harness. The set is from a 71 or 72 I bet because of the style of door switches. Strangely enough I am just finishing up installing a set friends 72. With a 70 there is a circuit breaker on the firewall near the master cylinder. A wire comes through the grommet and attaches to a stud. 72 does not have this. The major question is where do the thick orange with black stripe which I think is main power go? There is a pink wire as well. On 72 these both snap into the fuse box. 🗃️ the assembly manual does not really show where these go in 70-71. There is also a relay behind drivers kick panel. American Auto wire shows 70-72 harness is the same? Anyone have any experience with this. I�ll include pictures.