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FE Power Forums => FE Technical Forum => Topic started by: BigBlueIron on February 10, 2016, 11:54:06 AM

Title: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 10, 2016, 11:54:06 AM
Pulled a block out last night to look over and do a few oil mods to in anticipation of a future low buck grenade motor. I believe this to be a late model 360 that has never been gone through. Stock bore nothing out of the ordinary so far with the exception of the attached pictures... First FE block Ive had like this, there was also an area along on the pan rail about an 1.5" with several porosity holes. I forgot to snap a pic of that area but it is much worse but in an area that shouldn't effect anything.

Has me a little concerned since I'm shooting for 400hp on this build with some questionable parts, or maybe this is the perfect block for such a build? If I was building something for a driver I wouldn't worry about it.

What are your thoughts??

Title: Re: Thoughts, Advice on block porosity
Post by: blykins on February 10, 2016, 12:05:30 PM
Show a picture?
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 10, 2016, 12:10:51 PM
pic 1
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 10, 2016, 12:13:30 PM
Pic 2
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 10, 2016, 12:14:48 PM
pic 4
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 10, 2016, 12:17:07 PM
Bearing from this journal, no abnormal wear or bad indicators.
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 10, 2016, 12:25:27 PM
Show a picture?

Took me a minute to resize everything..
Title: Re: Thoughts, Advice on block porosity
Post by: jayb on February 10, 2016, 12:34:56 PM
That's not close to a water jacket, I wouldn't sweat it.  And I would say that any 360 block ought to be able to take 400 HP.  Build that low-buck grenade LOL!
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 10, 2016, 01:44:48 PM
That's the plan, wasn't so worried for no more power then I plan on, just more curious how often anybody else sees this and has it caused them any issues.
Title: Re: Thoughts, Advice on block porosity
Post by: blykins on February 11, 2016, 05:55:15 AM
I have never seen that before....
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 11, 2016, 10:50:17 AM
Area along the pan, I was mocking up to drill and tap for an FT oil pickup. Ugly... :-[
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 11, 2016, 10:57:06 AM
Not sure it matters but I thought I would note this is a mirror 105, 3 web block. I think D4TE Not positive, I can check all the block numbers if anyone cares to know.
Title: Re: Thoughts, Advice on block porosity
Post by: Qikbbstang on February 11, 2016, 11:56:28 AM
The first FE block I ever "picked" up was a warrantied 390 short-block laying around the shop at the Ford dealer I worked at. It had a pin-hole leak about half-way down a cyl's bore.  There's even a part in the shop manuals that show where leaks can and can not be repaired. I always kept it in my mind that "boring" a block could uncover a pin-hole, though I never heard of it happening to anyone..
Title: Re: Thoughts, Advice on block porosity
Post by: C6AE on February 11, 2016, 12:26:57 PM
The first FE block I ever "picked" up was a warrantied 390 short-block laying around the shop at the Ford dealer I worked at. It had a pin-hole leak about half-way down a cyl's bore.  There's even a part in the shop manuals that show where leaks can and can not be repaired. I always kept it in my mind that "boring" a block could uncover a pin-hole, though I never heard of it happening to anyone..

I've had that happen more than once, but only when installing sleeves, and then it doesn't matter...
Title: Re: Thoughts, Advice on block porosity
Post by: cjshaker on February 11, 2016, 01:13:58 PM
Maybe it's just me, but it looks like there's a hairline crack extending from the oil hole over to that porosity hole, which would concern me enough to have it magnafluxed. Maybe it's just dirt, or an oil streak. Chances are you wouldn't have any trouble at that power level, but I would do it for piece of mind. A crack will only do one thing, get worse.
Title: Re: Thoughts, Advice on block porosity
Post by: machoneman on February 11, 2016, 01:24:56 PM
One big thing to consider: if his block has been run (and it certainly looks like it) for thousands of miles already, it's pretty much good to go.

I do remember long ago while at Brigance Chevrolet in Oak Park, IL in the early 70's (confession: started out racing BBC''s in early Camaros!) once in a great while a car would come off the car hauler and the engine leaked oil into the coolant, the other way around or fluids just leaked out period. Chuck White, the expert parts guy, said the mechanics would just do a fast look-over and then pop the engine and stuff in a brand new replacement long block! I asked Chuck why and he said that since the car was new and untitled, they took a risk in doing a teardown and repairing the numbers matching engine. Instead GM said to put the removed engine on the side and await pickup for inspection. 

Sad part? Chuck later told me it was b.s. and the GM driver that did the pickup said the engines went right to a junkyard where they were smashed up and recycled. I wanted to buy one Z-28 302 and one BBC from  the set-aside pile but this was strictly forbidden as the dealership then would not get credit for the new engine swap! 
Title: Re: Thoughts, Advice on block porosity
Post by: BigBlueIron on February 11, 2016, 01:56:51 PM
Maybe it's just me, but it looks like there's a hairline crack extending from the oil hole over to that porosity hole, which would concern me enough to have it magnafluxed. Maybe it's just dirt, or an oil streak. Chances are you wouldn't have any trouble at that power level, but I would do it for piece of mind. A crack will only do one thing, get worse.

I have looked it over fairly good specifically for a crack but did not find any.
One big thing to consider: if his block has been run (and it certainly looks like it) for thousands of miles already, it's pretty much good to go.

I do remember long ago while at Brigance Chevrolet in Oak Park, IL in the early 70's (confession: started out racing BBC''s in early Camaros!) once in a great while a car would come off the car hauler and the engine leaked oil into the coolant, the other way around or fluids just leaked out period. Chuck White, the expert parts guy, said the mechanics would just do a fast look-over and then pop the engine and stuff in a brand new replacement long block! I asked Chuck why and he said that since the car was new and untitled, they took a risk in doing a teardown and repairing the numbers matching engine. Instead GM said to put the removed engine on the side and await pickup for inspection. 

Sad part? Chuck later told me it was b.s. and the GM driver that did the pickup said the engines went right to a junkyard where they were smashed up and recycled. I wanted to buy one Z-28 302 and one BBC from  the set-aside pile but this was strictly forbidden as the dealership then would not get credit for the new engine swap! 

This engine has had a long life, bearings very worn but all look the same, indicating to me things where fairly happy. I would have considered it one of my best cores if it wasn't for the porosity. The plan is to contunie with the build and see what happens.  :)

Sad some of the "Good" parts that get thrown away for warranty reasons..

Title: Re: Thoughts, Advice on block porosity
Post by: Nightmist66 on February 11, 2016, 09:36:50 PM
Maybe it's just me, but it looks like there's a hairline crack extending from the oil hole over to that porosity hole, which would concern me enough to have it magnafluxed.

I thought the same thing at first too, Doug. If you look at it, it is actually a stain from the misaligned oil hole in the bearing.


As for all the porosity, that is weird. Maybe it was a Friday at the Foundry?
Title: Re: Thoughts, Advice on block porosity
Post by: FE Jonny on February 11, 2016, 10:32:38 PM
One big thing to consider: if his block has been run (and it certainly looks like it) for thousands of miles already, it's pretty much good to go.

I do remember long ago while at Brigance Chevrolet in Oak Park, IL in the early 70's (confession: started out racing BBC''s in early Camaros!) once in a great while a car would come off the car hauler and the engine leaked oil into the coolant, the other way around or fluids just leaked out period. Chuck White, the expert parts guy, said the mechanics would just do a fast look-over and then pop the engine and stuff in a brand new replacement long block! I asked Chuck why and he said that since the car was new and untitled, they took a risk in doing a teardown and repairing the numbers matching engine. Instead GM said to put the removed engine on the side and await pickup for inspection. 

Sad part? Chuck later told me it was b.s. and the GM driver that did the pickup said the engines went right to a junkyard where they were smashed up and recycled. I wanted to buy one Z-28 302 and one BBC from  the set-aside pile but this was strictly forbidden as the dealership then would not get credit for the new engine swap!

HUH I'll be, I bet we crosses paths, I worked,for Jimmy Urso, Kenny Sanfort and did a lot of dealer and race machine work over at Performance Machine over on Western back in the eighties. Was a Chevy/ Ford guy back then and ran a 80 Chevy truck with a 383 Dart engine, a 1974 Elcamino 454 BB, my tow vehicle was the 1968 Ford 410 SD I still have now. Used to hang with Russ Lindert and Gary Dyre.
Title: Re: Thoughts, Advice on block porosity
Post by: cjshaker on February 11, 2016, 11:43:16 PM

I thought the same thing at first too, Doug. If you look at it, it is actually a stain from the misaligned oil hole in the bearing.


Ahh, you're right, Jared. I didn't notice it was just the continuation of the stain from the bearing hole.