DC Head

Pastor John · Aug 1, 2017

I finally found time in retirement to pull the DC head. I believe I have found toe source of my coolant leak! It looks like the center of the gasket
exploded!
Well I have some fun ahead of me, going to enjoy it!

casecollectorsc · Aug 1, 2017

Got to be a relief to finally find out what was wrong. Could have been more severe. I would take the head to a machine shop and have it planed to be sure it's flat. Maybe put new umbrellas on the intake valves to eliminate some smoking.

DKase · Aug 1, 2017

Where do you get umbrellas? When I put my last C head together I looked everywhere I could think of and never found any large enough to fit over the guides. Only option I could think of would be to press the guides out and turn the top end down.

DKase · Aug 1, 2017

I would still pull the hand hole covers and look at the bottom end of the sleeves and see if there are any antifreeze trails from leaking o-rings. Not much point in pulling the head again if they are leaking.

brutus49DC · Aug 1, 2017

I have never put umbrellas on a dc yet and I don't plan on starting. Good guides don't need them.

casecollectorsc · Aug 1, 2017

Hand covers were off and the trail of coolant came from the area of his leaking head gasket....we talked earlier this year...thought it may have been cracked in the push tube galley like the combine engine I was working on. Still have some seals here that Leonard Splinter gave me years ago. Don't really need them on a new valve job, but use them on some heads that haven't been rebuilt.

casecollectorsc · Aug 1, 2017

Yep, rebuilt heads don't need them, but sometimes they aren't always rebuilt.

Ron Sa · Aug 2, 2017

The head looks to be the 5505 high compression and the pistons look Aluminum. Looks like a good foundation for lots of power.

Looks like a deep pit in the head where the gasket failed. Hopefully that will machine out. We know that deep pits in the block's surface are a different problem. I have had success filling block pits with Permatex that hardens. It seems that trapped Permatex is better than trapped air. A rotary wire brush in a hand drill work good to shine the bottom of the pits so the Permatex will stick good enough to assemble.

CHUCK CAMBIS · Aug 3, 2017

Looks to be a very clean burning engine. Do you use standard pump fuel and does it contain ethanoyl, or use gas additives??? The 5505 or 5505A is standard head. chuck

kevinthefixer · Aug 3, 2017

(quoted from post at 10:25:37 08/03/17) Looks to be a very clean burning engine. Do you use standard pump fuel and does it contain ethanoyl, or use gas additives??? The 5505 or 5505A is standard head. chuck

I thought it looked way too clean, but that is normal if coolant has been leaking into the cylinders. Great way to decarbonize, but...

brutus49DC · Aug 4, 2017

Then I usually gave them knurled. I would rather have a little oil in the guides than a stuck valve.

DC Head

Pastor John

Member

casecollectorsc

Well-known Member

DKase

Well-known Member

DKase

Well-known Member

brutus49DC

Member

casecollectorsc

Well-known Member

casecollectorsc

Well-known Member

Ron Sa

Member

CHUCK CAMBIS

Member

kevinthefixer

Member

brutus49DC

Member

Similar threads