Is 69E 3.0 running too hot?

dkm_chgo · 08-20-2005, 04:00 PM

After running for 45 minutes in the street, a rebuilt (5000 miles ago) stock '82 SC engine with 40 PMO carbs in a '69E, seems to lag power after 4000 rpm. It seems to run sluggish all the way back to the garage to cool off. This has happened twice, recently. It has never happened before, even when driving in hot weather. Any suggestions as to what might be the cause of the problem? It doesn't have an oil cooler.

Plavan · Plavan's Garage

You may want to check/change the fuel filter.
What temp is "too hot"?

dkm_chgo · 08-20-2005, 06:11 PM

Will do. Thanks for the advice....this is the temperature.

What would lead to think it might be the fuel filter? Sorry for the
newbie question.

Plavan · Plavan's Garage

Stuff settles in the tank, then after driving for awhile it gets sloshed around then it gets picked up. It's just a good idea to check the fuel filter to make sure you do not have a bunch of gunk in the tank...
There is nothing wrong with that temp.

Chuck Moreland · 08-20-2005, 10:15 PM

I would be very surprised if your temps are not hot with the 3.0. The factory never shipped a 3.0 without an external cooler, they obviously thought it was needed.

The temp reading in the pic is fine..... IF the oil temp sending unit and dash guage are matched. The 3.0 and '69 2.2 use different units, so if you have the 3.0 sender and the '69 dash you will not get accurate reading.

That is not an original '69 guage either. Perhaps the one fron the SC was moved over.

Hot temps will cause carbed cars to run like crap, then the power returns when they cool down.

Jay Auskin · 08-21-2005, 07:23 AM

Dale--I had that problem with my T before refinishing the tank. There was a bunch of crap in it, and it would clog the screen in the tank. Remove the fuel sender, and take a peek in there with a flashlight. See if there's a bunch of sediment that can clog the screen. If not, then it's a fuel pressure issue, possibly pointing to the pump. Josh on GruppeB (jstein) re-did his SC 3.0 Weber fuel system, and can offer a lot of advice if you go this route. If you need help, let me know, you can swing by with the car. I'm a little further from you now (Oak Park), but I have a garage, so that's a plus

MotoSook · 08-21-2005, 07:34 AM

Dale,

I forgot that you had a 3.0 in your car. I thought it was the original engine. Anyhow, when I had my 2.7 in the Bastard ('76), the temps were acceptable. Even when I lived in Florida, my temps never got above 250 unless I was really pushing it.

When I put the 3.0 in it, temps were a concern. I eventually put a cooler on the car soon after the swap.

I'm with Chuck on the gauges. Although I did have temperature issues, I was CIS and I knew what my temps were (correct guage-senser combo).

Cleaning the fuel system...that's another topic, and it should be done if the it's never been done. And don't let Jay near your car! It'll have a police intercepter V8 in it before you know it