Way back when I was monitoring marine Diesel engines in operation we used to set the coolant to 180 F and oil temp to 225. That was for single weight RPM DELO 30. Seems like in EN"A" school 225 was the desired temperature for Lube Oil to help vaporize any condensation out. If my memory serves at 250 deg it starts to reformulate and become a solid. I used to have a styrofoam cup of oil I took out of the oil pan of early 70's Chev V-8 the owner though that oil changes were BS. 2 days before his 2 week long vacation the engine seized as the oil stopped pumping through the engine. We salvaged the tin and block. The heads, crank and cam /related parts were junk. I kept that cup of oxidized oil in a peanut can for 25 of my 29 yr teaching career (it went from here to Europe, back to WA state, then to AK I left it there when I retired). I could lift the whole cup out of the can with a wood pencil stuck in the oil. Made a good "show and tell" for those who think 30 days or 3000 miles is a sales tool. With better oils and depending on the kind of service the vehicle is used in the time/mileage may be debateable, but it has to be changed.  Another case in point is my B-i-L's '04 Chrysler full size with the 2.7 l engine that has a history of sludging even with timely oil and filter changes. Toyota and VW had a similiar problem and stood behind their product. Chrysler has yet too and the long block runs at least $3500.00 exchange plus other items and labor to R & R. Having just helped do his, it is a 2 day job at best. Interesting on my '04 Colorado with an oil monitor, the first change was indicated at 14K miles after the vehicle was put in service. I do not run the oil /filter that long but did not reset the light to see how long it would take for the computer to message me. It went 20K miles the first year, so many trips were long runs at operating temperature which is best. Also in US NAVY we used to centrifuge the oil constantly which separated the oil, water and solids by specific gravity and kept the oil healthy for long times.  So the numbers presented are reasonable. Max

Thumper... If I remember correctly,

M14 is the diametrical pitch of the threads
and x1.5 or x1 is the amount of progression per revolution.

Compare to a 5/8x16 thread in our system it would be
5/8" diameter and 1/16" progression per turn.

Check the fit between metric and english nuts and bolts, some fit with a little persuasion

Yes @140 deg F and no PCV (positive crankcase ventilation) any moisture will not evaporate out. PCV like we have on our vehicle puts a slight neagative crankcase pressure will helps the water boil out at a slightly lower temperature and not let any crankscase fumes in the atmosphere. Some of you are old enough to remember engines with road draft tubes and short engine life. And when the engine was tired and you raored up to a stop a cloud of smoke would drift out under the front bumper. Engines were rebuilt around 50K miles and were pretty worn out. Now we are not happy unless we get 150 K + miles from a car or light truck engine before an overhaul. So PCV's are good things and so is better oil, and ability to cool the engine evenly by circulating the coolant from the bottom up so the temperature difference is less as ir rises through the block.

Interesting idea.  What are the correct temperatures for the Savage engine?  Or any air cooled engine?

With an air cooled engine do we care about head temperature or oil temp?  I know that oil provides a lot of cooling to the top end and some of those are specified for head and cylinder use, too.

Savage_Rob wrote on 12/31/69 at 16:00:02:


It mentioned that they could withstand a pressure washer (which was discussed in another topic)

certainly cheap enough to play with may get a couple to fool with - there's a ir meter around here some place I attempt to locate and get a ballpark on the head temp from it's measurement - used it on small nitro engines - target was around 240f over 300f for very long and it was time to start looking for a new piston and sleve

thumperclone wrote on 12/31/69 at 16:00:02:


I wanna see.  Picture please