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They were Dodges. They rusted back into their natural form.

That head had 3 cracks pinned between the valves. That's likely what you see. I got the driver side head off today. It was clearly the leaker. I used a Cometic MLS gasket because the two 6.2/6.5 engines I have opened all had damaged top decks from vibrating fire rings. Anyways, I seems like the...

There also was no D model Chevy. It's a K5 or K30.

Long story, I bought a 2001 C3500 6.5 engine off eBay. It was supposed to be a runner but I decided to reseal it regardless. Good news is that a teardown revealed it to be a 2004 GEP engine. Bad news the block has 0.010 of wear from the head gaskets. I had the heads gone through and the block...

Make sure you get a tube support if you're going to use a compression union on plastic tubing.

I used spade terminals with heat shrink in the past. The spade terminals loosened and the heat shrink continued to shrink from the heat until all of the terminals were exposed. That is why I strongly recommend the Packard or Aptiv terminals.

--Chesterton's Fence

Anything that causes a seal to swell is damaging it. Your local auto parts store has seal kits for GM power steering pumps. It costs all of $10 to rebuild one. Sometimes they leak when the reservoir gets bent trying to tension a belt. In this case a kit won't do you so well.

The 6.5 engine I bought for my truck has porcelain boots.

That is the type of terminal your do NOT want to run. The automotive terminals have springs built in to them so the resist loosening but more importantly tolerate more plugging cycles. They also have a tang to hold them in the connector body. But, Packard 56 covers 1/4 inch wide terminals. The...

Don't buy too many. I'm not 100% because the dimension drawing doesn't have a width. I think it's 2.5mm. The connectors were originally made by Packard, then Delphi, now Aptiv. The plastic holders should be available as well but I don't have time to search them down.

If you do decided to replace your terminals they are still available from the OEM. https://www.mouser.com/ProductDetail/Aptiv-formerly-Delphi/15418891-L?qs=Z%252BL2brAPG1K4n7tNKtpd3Q%3D%3D You don't want to use spade terminals from the auto parts store, vibration will open them up. It needs to...

At 1200 rpm the 71 series engines in generator applications were actually pleasantly quiet. A 6-71 only made 75 KW in that configuration, though.

Speaking of Armor All, I am now convinced that Armor All and DOT 5 brake fluid are the same thing.

If I ever rebuild another 71 series I'll ditch the gaskets on the end sheets and use Loctite 515. The last two 6-71 engines I built had the check valves on the airbox drains and a catch can. They were relatively clean. I made an error building the blowers on both engines and missed a spot when...

If you're not seeing 180°F on the upper radiator hose your thermostat has failed.

FKM is the generic name for Viton.

You found the cause of your problem but for everybody else, use Viton tubing from an industrial supply house. The original tubing was Viton but most of the aftermarket stuff isn't. The aftermarket tubing will be hard and full of cracks after a year or two of daily driving. With good quality...

I used to run the Propel fuel that was available about 10 years ago in my CUCV. I was refilling every 5 days on regular diesel and 4 days on Propel. That was a full 20% reduction in economy. While it was less expensive it wasn't worth the extra time to get to the pump.

Modern bearings come packed with polyurea grease which is not compatible with most parts store greases. Do not regrease ball bearings without thoroughly cleaning the bearing or using the correct polyurea thickened grease. Lucas Xtra Heavy Duty is a polyurea grease but is an EP grease so it...