When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I was curious if you all could help me identify the engine in my car. The engine block has been painted green and has a Dwight and Linda Mitchell’s Autosport Technology slicker on the air box. Does this mean this motor was rebuilt by Autosport Tech or is it simply an air box with their sticker. Car is a 1976 911S.
Regarding the green engine block, are you referring to the green fiberglass shroud that is over the top of the engine? That is correct for a 2.7L USA engine from 74-77.
Not sure you can rely on the sticker for much. You can check to see if you have the right engine for your car - behind the orange hose to the right of the fan, on a flat part of the engine facing up, you'll find the engine type stamped in the case. For 1976, it would be a 911/82 for a 49-state USA car, or 911/84 for a California car. There is also a serial number stamped on a vertical surface to the right of the fan, but that won't tell you much without a Certificate of Authenticity from Porsche. I think you can call them and they will at least tell you if the engine is correct without you having to buy the certificate.
You still have the air pump, I wonder if you still have the thermal reactors? Do you have a photo of the underside?
Thank for for the quick response! I believe I look a picture of the numbers you are talking about. This car has nearly 130k on it and runs well (knock on wood). Starts up first shot with no smoke. At some point a mechanic though it was a 3.0 out of an 80’ SC. Anyway, I am aware that the 2.7 had a laundry list of issues that could cause catastrophic failure.
I’d like to figure out what I have so I can brace for impact if it is a 2.7. The number on the side is *6403545*
That's the serial number, and I think it designates a 3.0L from 1980, so your mechanic was right. If you look behind the orange hose, facing up at you should be another stamp. That should be 930/07 for a 1980 USA engine.
But something isn't quite right - you have an air injection pump (to the left of the fan) and the air injection piping underneath. Only 1978 and 1979 SCs had smog pumps in the US, by 1980 they were all 50-state cars (as opposed to a separate model for California) with 3-way catalytic converters and oxygen sensors.
Euro engines still had smog pumps in 1980, but those engine numbers were 630xxxx. Maybe someone replaced the old magnesium case of the 2.7L with an aluminum case from a 1980, and they didn't change the engine numbers, and reused the rest of the 2.7L components. I think that would be doable.
Hopefully someone else more knowledgeable will chime in.
06-10-2018 | 10:33 AM
76’ 911 S Green Engine Block Question
