With the recent number of multifuels that have cut loose lately, I thought those who experianced a grenaded engine could post when and the extent and the theory of what might have been the culprit. So if you could list the type/manufacturer of motor.
What aparently blew.
The date (aprox).
How you were driving ie. what RPM's and Speed.
And any comment you'd like as to why you think it went south.
There seems to be a common denominator here that is comeing to light....and that is the number six rod blowing. The last to recieve oil may have everything to do with it.... We all know the two best solutions to oiling is to get the Spin-on oil filters, currently the easiest to come by, JTonka's. They are anti-drain back thus leading to a quicker lube time, and ofcourse if we incorperate a pre-luber, we have effectivly addressed all of the shortcomings of the oiling on the multifuel.
The other thing that seems to be apparent in blow's is maxing RPM's for extended lengths of time, or esentially the same thing, trying to run at 60+ mph. I'm gathering that some of us, some of the time, DO run this way. And also that there is probably a larger number of us that do not.
__________________
M35A2 1972 Deuce w/w & ht
V Vet and Patriot
....be good or be quick........ usually good is the best bet......
there is an entire topic that covers this with info from the military and all the possible reasons why. you'd be very surprised at the information contained in that topic.
there is an entire topic that covers this with info from the military and all the possible reasons why. you'd be very surprised at the information contained in that topic.
Yes, but much of the surprising information had to do with the military users of the engine. We, presumably, are more gentle on our engines, and don't do things like stuff gasoline soaked rags into the air bell, and then run at full throttle.
With the recent number of multifuels that have cut loose lately, I thought those who experianced a grenaded engine could post when and the extent and the theory of what might have been the culprit. So if you could list the type/manufacturer of motor.
What aparently blew.
The date (aprox).
How you were driving ie. what RPM's and Speed.
And any comment you'd like as to why you think it went south.
A couple of additional questions I would like answered:
1) Was the engine remanufactured? If so, who did it?
2) Which cylinder threw the rod? (#1 front, #6 against firewall)
3) Was the crankshaft journal burned and scored, or still shiny?
4) Was the rod cap still attached, or were the bolts sheared free?
NO oil pressure on start and non for too long after!? is WHY Ive fitted pre-lube pumps on all my trucks! well at least I feel that more reasured/happy with (at least) 15lbs pressure BEFORE I hit the go button.
NO oil pressure on start and non for too long after!? is WHY Ive fitted pre-lube pumps on all my trucks! well at least I feel that more reasured/happy with (at least) 15lbs pressure BEFORE I hit the go button.
That helps prevent dry bearing wear on start up, but I don't think it has anything to do with the rod failures that are vexing us. None of them look like seized bearings; all that I have seen (so far) look like over speed failures.
Going to get a Christmas tree and running in the NAM are related how?
The only similarity it requires, I believe, is long periods of high RPM operation of the engine.
A deuce with standard tires, tooling down the road at 55MPH, is rather a kin to running a passenger car at the redline continuously. It works for a while, but in the end it will shorten the engine life.
Blown multifuel motors
