| Author | Message | ||
| Dennis Sagisser (Busbunch) (64.12.96.235)
Rating: N/A |
I am looking for info on the 8.2 Detroit Diesel motor? | ||
| Craig S (65.202.123.254) Rating: N/A |
Hi Dennis, There is a thread down about 13 entries posted on 1/18 that talks about the 8.2. The heading is .."What is the model number". Craig S | ||
| Dennis (152.163.188.227) Rating: N/A |
Thanks, forgot to do my homework | ||
| carolina houndog (166.102.180.30) Rating: N/A |
My mechanic tells me that the 8.2 is the biggest piece of 4 stroke, medium duty truck, poo dunk, to ever come out of detroit. He says the parts are expensive and you are likely to need many of them. He strongly advised me not to by a truck that had one in it. The fact they are no longer in production speaks volumes. | ||
| Henry R. Bergman, Jr. (Henryofcj) (65.194.145.59)
Rating: |
Just to help you out here, the 8.2 Detroit was based upon gasoling V8 production facilities, was very inexpensive to sell, expensive to run and had some strange characteristics. Was a 500 inch 4 stroke V8 diesel that did not have sleeves or liners, but did have the same unit injectors as the earlier 2 stroke Detroits. The mill came in both non and turboed versions. There was no intercooler. Power ratings varied from around 150 hp and 350 torque with no turbo at around 2500-3000 rpm and 1200 to 1500 rpm to around 220 hp and 525 torque at 2500 to 2800 rpm and 1200 to 1500 rpm for the turboed version. Physically, the mill is very compact and light, not much bigger than a 427 gas engine and smaller than a 3208 Cat V8 or 6V71. Weights about 1000 pounds with no turbo and about 1100 with the turbo and accessories. We swapped a non turboed 8.2 into a Ford one ton truck years ago which shows you how big and powerful the 8.2 is, which is not very. Compare it to the 453T Detroit and you get the idea. The 8.2 was designed to be a somewhat temporary low cost diesel option for those who speced two ton truck who wanted a diesel engine. Detroit years ago were practically giving away the engine along with the smaller AT 540 4 speeed Allison. They lasted about as long as the 427 Chevy gas engines, but gave much better fuel mileage while they lasted. Eventually they were discontinued due to the emissions they put out. I think the engine still has some success in the pleasure boating industry (correct me someone if I am wrong) because of it's price and size. Off road ratings like in boats are much higher, but with less service life. Personally I think there are better choices than the 8.2. Older technology like the 2 stroke Detroits seem to hang on forever, while the 8.2 seems just to have gone away. An expensive mill to overhaul and maintain/tune. (lots of parts) Hope this helps you out somewhat. This mill was popular at one time to replace shot older diesels such as the V6 toro flow diesel and the earlier Cat midsize V8's. One can do better in a coach conversion. Thank you and good luck. Henry | ||
| Henry R. Bergman, Jr. (Henryofcj) (65.194.145.59)
Rating: N/A |
Forgot to say that no Jake Brake was made for the 8.2, but that an exhaust brake will work. Good luck. Henry | ||
| John the bsuboy (12.82.138.12)
Rating: N/A |
The 8.2 is a nice engine, at least the one we have. There are folks who hate them and folks who like them. If you go with one this is an important thing to remember. People who hate them will sell you parts for them cheap. The early models had 14 mm head bolts. This led to head gasket problems. At least thats the story. Sometime before 1984 Detroit went to a 15 mm head bolt. These work fine. The newest engines had 8 valve cover bolts instead of 11. These might be the nicest engines to have. Our engine is rated at 205 hp at 3000 rpm and 442 ft-lbs of torque at 1700 rmp. Cold idle oil pressure is 80 lbs. Hot idle oil pressure is 30-40 lbs. One suprising problem with this engine is getting it to run hot. In hot weather it is fine, but once fall sets in the engine just doesn't want get up to 180 degrees. I have been trying to find a 190 degree thermostat. An ex-mechanic told me that in Alaska they used to block off one of the thermostats. New parts for this engine are no more expensive than any other diesel. Used parts are a lot cheaper, for reasons mentioned. We get white smoke on a cold start. We use about 1 qt of oil per 1,000 miles. Most of it seems to leak from the front crankshaft seal. The cooling system doesn't leak. They're just like a woman, all you have to do is figure out what it takes to keep them happy and then they will keep you happy. For you female readers just replace "woman" with "man" and political correctness will be restored. John the busboy | ||
| Dennis (64.12.96.235) Rating: N/A |
Thanks so much for all that info. Sounds like this engine may have had some of the same problems other converted gas engines have had, but treated as such, are a fuel saving option. Do we know when they went to the 8 valve cover bolts, and how bout when they dropped the engine? The engine is actually in a two ton I'm interested in, for towing/hauling that I would not do with the bus. |
