Lmackattack

My injection pump has a leak at one of the barrels where it threads in. I recall someone saying you can remove the line, unthread the barrel and a oring is in there? Is it that simple? This is on my 1977 285 maxidyne

Should the pushrods be spinning back and forth. Just curious

Heres a video I took on the test run. https://youtu.be/sSRhREtpZlA?si=SnhVHakZtzeeufg1

Got mine on ebay 2 months ago. About $70 for a set pertaining to my year truck

Ok. Got them re adjusted. I checked each set of rockers before adjusting them. I found Holes 1, 5 and 3 were spot on as expected. Holes 6,2 and 4 were loose. After re setting them all to .016 and .024 I fired it off and no ticking sounds like the other day. I have The incorrect exhaust clamp on the downpipe, so you might hear some exhaust leak in the video.But the ticking is definitely gone from the other day. Test drove. Builds 24psi boost, Pyro was 950 with foot on brake holding rpm at 1600 in direct for about 20 seconds. Engine is definitely quieter and smoother all around. Even at idle it's smoother. Thanks again for everybody's help. https://youtu.be/1OGatrOBdl8?si=9Nyouam3FCGJUN8V

I'll get a new vid next week 😎

this was last week after I put the heads back on https://youtu.be/ZXFH3xLgHtM?si=zPMPUuQFagmrnnvT

I am as well. However as I was adjusting them I never moved one adjuster more than about a 1/4 turn from their original position. I also spun it over with my ratchet 3 or 4 times before I started it just to make sure It was not interfering with the pistons

Yep. I understand now that you guys explained it clear for me. I was mistakenly adjusting 2 holes every 120* of rotation. When I saw the 1-6 2-5 3-4 I thought I was to adjust both holes together. But I think i understand now. Adjust tdc cyl1 (compression stroke) rotate 120deg and only adjust cyl 5 rotate 120deg and only adjust cyl 3 rotate 120deg and only adjust cyl 6 rotate 120deg and only adjust cyl 2 rotate 120deg and only adjust cyl 4

Yep. Glad I asked I knew I missed something. I could hear the ticking

Yes the damper is as seen in the photo.

Ok that helps explain it better. I only did 1 full rotation as i was adjusting. I put 1 on tdc in the compression stroke. Adjusted 1-6,rotated 120* then did 5-3, rotated 120* to do 3-4. Guess I have to redo it again. Thanks for the help

Can someone confirm if I adjusted the valves right. I think I may have miss understood the process. And I have never done a valve adjustment before. I rotated the engine till the pointer was on the TDC mark of the damper with #1 on the compression stroke. I adjusted cylinders#1 And #6 at the same time. Then rotated normal engine rotation direction 120* to the next tic mark on the damper labeled cyl 5-2 and adjusted them both Then rotated another 120* to adjust cyl 3-4 and adjusted them both. I rotated the engine 3 or 4 full rotations by hand to make sure no valve interference then started the truck and it runs fine but definitely seams to have more rocker ticking noise. Where did I go wrong🙃

Not sure. It looks very similar to mine but not sure if the cummins have different fan mounting bolt spacing.

Check out ebay . https://www.ebay.com/itm/355759405070?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=v0muxadktfq&sssrc=4429486&ssuid=B7peNTQaQY-&var=&widget_ver=artemis&media=MORE

I'd assume you could put a mechanical fan clutch on the 290. My 77' maxidyne had a fan mounted directly to the pully. I was able to put a fan clutch on with no other modifications. It greatly reduces noise and gives you about 10hp back to drive the wheels

I was nervous, I'm not going to lie! Hopefully button it up after a valve adjustment and new valve cover gaskets

https://youtu.be/ZXFH3xLgHtM?si=ZVOMdnOkcFqnAi1L

Weather finally let up from the heat wave we have been dealing with. 67 degrees all morning so I jumped on getting the heads back on. Barely broke a sweat working outside until 2pm. You can see the carbon build up on the 2 studs that was not allowing the heads to come off. I spend 2 hrs removing the stuck nuts from about 30 studs then wire brushed all the studs and threaded holes. Ran a tap thru them to clean them out and was able to put the studs in with just my fingers. Scrubbed all the old gasket material off the mating surfaces, Pressure washed the heads put New head gaskets on with new fire rings. Was able to set both heads on as an assembly just how i had removed them with absolutely no trouble. One thing I noticed with this job is when I had removed the head studs/nuts all but a few came out with just a hand held 1' long 1/2" ratchet. They took no where near the effort of 175ft lbs to remove them. Today I used a 3' long torque wrench and it was pretty obvious the old gaskets were not held down as tightly. I suspect the old gasket was just soft with age or someone did not torque them properly. My book says to check them again after 1 hour of under load time.

I didn't get a chance to get pics today. But the heas gaskets with fire rings are on the way. Hope to button it up over the weekend.

Thank you. That's what I figured. My book made no mention of that they were all stamped the same

300+ made 1050ftlbs where the endt676 maxidyne makes 1080ftlbs. Both are tipturbine engines

I think the concept of the 315 (300+) was a great option for those who did not like the maxidyne with only 5 speeds. I the maxidyne made slightly more overall torque than the 315 but the 315s had more hp and their max torque more in the mid rpm range. The few 315s I drove seamed to pull better in the hills. And yes I was always surprised when a new diesel just needed a little reprogram to get +50hp. It goes against everything we learned on mechanicals.

I think that is correct. What's odd is the 285 tipturbine is a maxidyne where the 315(300+) was still considered a thermodyne. These 2 valves were pretty bullet proof and easy to work on

I'll get a better picture of it tomorrow. I got done with work around 4. And spent the next hour, pulling the heads off before i had to head home. I didn't feel anything but I also don't have a lot of experience with engine internals.