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lxmodguy

Aluminum Motor Folks Step Inside

43 posts in this topic

pn P5155507,  sn 0134-5507V date 13.1.11   Oil looks like honey,  antifreeze looks like - well antifreeze

 

This is what I figured, The guy is saying the oil looks like it should, and the antifreeze looks like it should, In other words, all good!

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I've had mine for a couple of years now. Not a daily driver but I do put some miles on her. I drive from NYC to VA for the MSHS events twice a year. I also drive over an hour each way when I go to tracks in my area a number of times per year. Not to mention the abuse at the track.. . . lol.

 

Knock on wood no issues so far and each oil change looks good.

 

My motor belonged to AJ Hemituner who ran it for a season. Before it came to me it was opened up and all looked good.

 

 

Just an FYI the lighter block raised my front end up quite a bit so factor in some suspension work to get it back down.

That's good info for me.  I just made the move on a 440 Alum. and will need any insight you guys can give.  Fortunately I'm riding on coilovers so I can swing that adjustment easy.

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From what I'm told, the older aluminum blocks had porosity issues. I bought a new one this year. I have zero water issues and have done nothing special to prevent or keep it from happening. Mine is a 4.185 bore x 4.200 stroke. I have about 800 miles on mine so far. All daily street driving

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It's not an infantile failure. It occurs over time. Heat cycles and stress from high torque loads cause crack propagation from voids in the casting is my guess. I know they have been improving the block over time but I don't know of any "clean point" that has been found. The impregnation process helps fill the voids and make them less susceptible to cracking and leaking.

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If they do push water its usually around the motor mount. Seems the blocks that were impregnated are holding ok.....the early block were not that I know of and had more issues than just being porous.

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Well, looks like I may have spoken too soon. As mentioned earlier looks like over time issues may develop as mine recently started leaking coolant externally right next to the passenger side drain plug. Tried loading a pic (file was too big) but I see a small amount of coolant coming through the block.

 

I had the car on ramps, cleaned the spot and ran the motor on a few different occasions to make sure it wasn't coming from the drain plug (just to be safe I did remove and reseal it). I literally watched coolant start to appear on a dry spot.

 

Car isn't being used for now and when I get the chance I'm planning on taking her in for a 2nd set of eyes to check it out.

 

My block number is P5153896AA

 

 

 

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No doubt E and I'll be keeping my eyes on the oil. I'm wondering if the integrity of the block itself is becoming compromised. I'm hoping it doesn't lead to a crack.

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Looks like mine was born 10-3-10. I didn't locate an 1-26 but did see an H201. I can't seem to upload pics due to size but below are (hopefully) links to photobucket pics of the three spots with numbers on the block.

 

 

 

http://i66.photobucket.com/albums/h274/bklynmag/3_zpspeztmnvu.jpg

http://i66.photobucket.com/albums/h274/bklynmag/2_zpsddw4xbfs.jpg

http://i66.photobucket.com/albums/h274/bklynmag/20151121_155750_zpsunsqvgot.jpg

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Looks like mine was born 10-3-10. I didn't locate an 1-26 but did see an H201. I can't seem to upload pics due to size but below are (hopefully) links to photobucket pics of the three spots with numbers on the block.

 

 

 

http://i66.photobucket.com/albums/h274/bklynmag/3_zpspeztmnvu.jpg

http://i66.photobucket.com/albums/h274/bklynmag/2_zpsddw4xbfs.jpg

http://i66.photobucket.com/albums/h274/bklynmag/20151121_155750_zpsunsqvgot.jpg

see the 0008 on the pad? That means you have #8

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