218 flat six max RPM

[D35 Torpedo]

Those offset rods don't look like much of an issue. 

[wallytoo]

6 hours ago, Matt Wilson said:

Wow, what a mess!  I'm sorry to hear that it went south like that.

 

What was the motivation behind annually cleaning the insert and journal?  Did you see that there was more than the desired clearance when you took it apart that first time (after the knock during the first run)?

 

eh, the mess was my fault.  it is what it is.

 

as far as motivation, the polished surface of #2 rod journal had a scratch in it from that initial deal.  afterwards, i'd swap out the insert when that bearing got a bit noisy, which seemed to be after about 900 to 1200 miles.  it was getting noisy on the last trip, and really got noisy when i downshifted for the steep hill.  having the spare engine on a stand in my garage influenced my decision to just keep going, rather than getting it towed home to pull the pan and put in another insert.  i was kind of ready anyway to stop having to do that.  so far, so good with the 251 (which also has full-pressure oiling).

 

 

 

[Matt Wilson]

2 hours ago, wallytoo said:

 

eh, the mess was my fault.  it is what it is.

 

as far as motivation, the polished surface of #2 rod journal had a scratch in it from that initial deal.  afterwards, i'd swap out the insert when that bearing got a bit noisy, which seemed to be after about 900 to 1200 miles.  it was getting noisy on the last trip, and really got noisy when i downshifted for the steep hill.  having the spare engine on a stand in my garage influenced my decision to just keep going, rather than getting it towed home to pull the pan and put in another insert.  i was kind of ready anyway to stop having to do that.  so far, so good with the 251 (which also has full-pressure oiling).

 

 

 

I see.  Yeah, I definitely get not wanting to continue addressing that bearing.

 

Also, I must say, it's nice seeing photos of these trucks being used for some real work and yours is a particularly good photo, with the wood stacked up high.

[Matt Wilson]

4 hours ago, D35 Torpedo said:

Those offset rods don't look like much of an issue. 

I don't think they are too much of an issue.  They just don't spread the load out quite as evenly over the bearing and crank journal as the 25" engine rods do, so in theory, there is probably some added wear, but not a major thing.

Edited August 18, 2023 by Matt Wilson

[D35 Torpedo]

3 minutes ago, Matt Wilson said:

I don't think they are too much of an issue.  They just don't spread the load out quite as evening over the bearing and crank journal as the 25" engine rods do, so in theory, there is probably some added wear, but not a major thing.

Say you shwinged that extra bit off the end to make it even. It would still be fine (Provided the journal was equally as narrow). Tons of engines have narrow bearings. It looks like they didnt want to compromise the crank by moving the journal over to much so they offset the rod.  Way she goes.

[Matt Wilson]

12 hours ago, D35 Torpedo said:

Say you shwinged that extra bit off the end to make it even. It would still be fine (Provided the journal was equally as narrow). Tons of engines have narrow bearings. It looks like they didnt want to compromise the crank by moving the journal over to much so they offset the rod.  Way she goes.

Hmmm, interesting.  It's generally regarded that Chrysler used the approach of offsetting the rods to shorten the engine, for considerations of space within the engine bay and the overall car. Anyway, both the 23" and the 25" engines seem to be very good, solid, reliable engines.