Dumbo The Flying Elephant

Larry Hill · 12-06-2019, 08:37 AM

Since I'm the engine builder I will have to take the blame. A air leak, @ 45 psi, was found at block to front cover. Water flows both directions to and from water pump through front cover. Will check block and cover for flatness, O ring grove for depth and finish, and O ring type gasket for cuts. Reassemble and re check.

Checking tool was a blocked off water pump, 0-60 psi tire gauge, Schrader valve. Gauge was piped in.

denbreeden · 12-06-2019, 09:34 AM

Quote:

Originally Posted by Larry Hill

Since I'm the engine builder I will have to take the blame. A air leak, @ 45 psi, was found at block to front cover. Water flows both directions to and from water pump through front cover. Will check block and cover for flatness, O ring grove for depth and finish, and O ring type gasket for cuts. Reassemble and re check.

Checking tool was a blocked off water pump, 0-60 psi tire gauge, Schrader valve. Gauge was piped in.

Good job finding that leak! Better than a crack somewhere.

Dennis Breeden

Larry Hill · 12-06-2019, 01:56 PM

Leaking in chain area

Dyno · 12-06-2019, 03:03 PM

I would think that at 45 psi you could create leaks that normally would not exist. Check the oil drain back hole near the block water drain plugs. That is where the aluminum blocks have been known to leak water.

Doug Domm · 12-06-2019, 04:04 PM

Maybe try using antifreeze vs water for testing. That stuff will find its way out of places water won’t.

Larry Hill · 12-09-2019, 08:10 AM

Tried to installed new front cover, cam basket would not allow cover to seat against block. Going to machine cover for clearance, sounds easy. Just need to figure distance between cam and crank center line. Set mill up with riser blocks, 90* fence, remove front seal to pick up crank center line. Install bore head, fab tool, cut case 5.062 OD X 4.625 ID .060 deep on cam center-line. Piece of cake!

Reused old cover after inspection and cleaning with new seal. The block, heads, and water pump were holding 45# pressure for 30 minutes when I quit last night. Time to see if it leaked any last night, I'm crossing my fingers.

kansas stocker · 12-09-2019, 10:31 AM

Really appreciate your early morning reports. They remind me of what I need to get done.
Pete

12-06-2019, 08:37 AM	#1
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,629 Likes: 1,919 Liked 10,679 Times in 2,222 Posts	Re: Dumbo The Flying Elephant Since I'm the engine builder I will have to take the blame. A air leak, @ 45 psi, was found at block to front cover. Water flows both directions to and from water pump through front cover. Will check block and cover for flatness, O ring grove for depth and finish, and O ring type gasket for cuts. Reassemble and re check. Checking tool was a blocked off water pump, 0-60 psi tire gauge, Schrader valve. Gauge was piped in. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

12-06-2019, 01:56 PM	#3
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,629 Likes: 1,919 Liked 10,679 Times in 2,222 Posts	Re: Dumbo The Flying Elephant Leaking in chain area __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

12-06-2019, 03:03 PM	#4
Dyno Senior Member Join Date: Dec 2002 Posts: 915 Likes: 1,129 Liked 680 Times in 203 Posts	Re: Dumbo The Flying Elephant I would think that at 45 psi you could create leaks that normally would not exist. Check the oil drain back hole near the block water drain plugs. That is where the aluminum blocks have been known to leak water.

12-06-2019, 04:04 PM	#5
Doug Domm Member Join Date: Apr 2006 Location: canada Posts: 251 Likes: 28 Liked 84 Times in 21 Posts	Re: Dumbo The Flying Elephant Maybe try using antifreeze vs water for testing. That stuff will find its way out of places water won’t.

12-09-2019, 08:10 AM	#6
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,629 Likes: 1,919 Liked 10,679 Times in 2,222 Posts	Re: Dumbo The Flying Elephant Tried to installed new front cover, cam basket would not allow cover to seat against block. Going to machine cover for clearance, sounds easy. Just need to figure distance between cam and crank center line. Set mill up with riser blocks, 90* fence, remove front seal to pick up crank center line. Install bore head, fab tool, cut case 5.062 OD X 4.625 ID .060 deep on cam center-line. Piece of cake! Reused old cover after inspection and cleaning with new seal. The block, heads, and water pump were holding 45# pressure for 30 minutes when I quit last night. Time to see if it leaked any last night, I'm crossing my fingers. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

12-09-2019, 10:31 AM	#7
kansas stocker Member Join Date: Oct 2002 Location: kansas Posts: 235 Likes: 494 Liked 249 Times in 48 Posts	Re: Dumbo The Flying Elephant Really appreciate your early morning reports. They remind me of what I need to get done. Pete

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