I need help - engine

[Redpatrol7760]

So, my 67 took its maiden voyage this weekend. Just had carb send off and rebuilt, new wiring harness installed, and few other items added. Couple trips around the block, couple hill climbs on the back of the proprty, and then a spirited drive down the road. All fine and good. Later on Sunday I drove my normal drive to work. Roughly 5 miles in and I hear knocking (uh oh) then I pull into a parking lot and hear a loud squeal then the truck jerks and I shut it off. Look around pop the hood and there is a small amount of smoke coming from the entry hole on top of the motor. Let everything settle and cool down before I try to get back home. About a mile in loud squeal and engine shuts off. It won’t restart and I get a tow home. This morning I go out to truck and it starts and runs with the knocking g still there. Any ideas of what I messed up???

I also have a video of noise but can’t post to forum.

[Redpatrol7760]

IMG_2148.jpg

Here is a pic of it while the fun lasted.


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[mad4hws]

in the immortal words of Joe Dirt

Dang.....

I have no idea what it could be (others most assuredly will). I feel for you though, that sounds like my kind of luck. I hope it is an easy fix.

[Esteban]

Very sorry to hear about this mishap. The combination of the loud squeal and the knocking is a bit worrisome and difficult to come by with an explanation. A connecting rod seizing temporarily on the crankshaft might produce the squeal sound, although I've never heard it (I did seized an engine once). You might have to do a compression test of all the cylinders as an starting point, and also drain the oil and carefully inspecting it for any signs of unusual debris.

Was the knock present at all times, idling, coasting, accelerating?

At this point I will suggest not to drive it until you can pinpoint the cause and to avoid any further damage.

If anything points to the engine, opening it is not difficult and can be done with it in the vehicle. However, any damage done to the internals will require rebuilding it.

[Redpatrol7760]

Yes Esteban, my next thought was to drain oil and inspect. I’m sure this will require rebuild or maybe repower all together.

I have to say the brief time I got to drive it I was on cloud 9. It drove way better than expected and I can’t wait to have it back on the road.


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[RiverPatrol]

What condition is the water pump and belt in? Maybe it overheated?

[Redpatrol7760]

River, I’ll check water pump when I get a chance. That is my thought too.


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[Redpatrol7760]

I have been emailing videos with Esteban and he narrowed to a failed rod bearing. Others I’d explained the issue to agreed. Looks like I’ll be learning how to rebuild an engine. River, I do believe that it is the result of over heating but have yet to inspect the water pump and belt. It’s dark here at 5:00 and I haven’t made room in the garage yet


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[Redpatrol7760]

I meant to add that Esteban is beyond helpful! I knew when he chimed in that we’d have the issue pin pointed


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[RiverPatrol]

I have been emailing videos with Esteban and he narrowed to a failed rod bearing. Others I’d explained the issue to agreed. Looks like I’ll be learning how to rebuild an engine. River, I do believe that it is the result of over heating but have yet to inspect the water pump and belt. It’s dark here at 5:00 and I haven’t made room in the garage yet

Well, that sucks. The condition of the water pump is moot now, you'll want to replace it or rebuild it when you rebuild the engine anyway. Out of curiosity, what's the mileage on your Patrol?

[Redpatrol7760]

Well it shows 76k but mileage isn’t working and I don’t know how long it has been stuck


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[RiverPatrol]

Thanks. From what I've seen it seems that the Patrol engine will typically need a rebuild between 80k - 100k miles, so it seems that yours is close to that range. Higher mileage indicates potentially more highway driving, higher revs sustained for longer periods. The P engine bearings really don't like that. I think it could off road forever though.

[Redpatrol7760]

I have moved the patrol inside now and started looking around. Took the top of the motor and noticed a lot sludge and build up. I’m guessing from over heating. Also lots of debris in fuel filter. I pulled and cleaned the tank a year ago but hasn’t run much since what’s the remedy here? Also, I’m really torn on what to do. I could rebuild this engine but also seen a lot of luck from posters putting in 350 small block. Honestly, this hurts to even think about but the availability of parts is a big plus. If I did this I’d also replace axles and transmission.

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[RiverPatrol]

My personal opinion is that swapping the stock engine for something "with better parts availability" isn't a sound argument. Once you rebuild or swap the engine, you're not going to have to worry about engine parts for the rest of the time that you own the vehicle. And, there isn't an availability issue for the majority of the P engine parts. Just my two cents.

[Volkmann77]

Nothing worth doing is easy. Keep it original IMO.