si blown bottom end

bbeem

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Just got a call from my friend on his way home from work. He was cruising at 60mph in 5th or 6th not accelerating. Sounded like he hit something, which he didn't, and then shaking and smoke and he pulled over and saw the oil puddle. He took a couple pics of the damage. He said he found a motor for $2600 out of a wrecked si but I didn't see the details.

He just runs a ktuner base map and doesn't run the car nearly as hard as I run my si on ethanol tune. Last month he had a misfire on cyl 3 and drove it 15 miles home. I went to check it out and plug 3 was broken. The ceramic was broken but it didn't come apart. Replaced all 4 plugs and it ran great for 4 weeks untill it blew today. It's a 19 with 41k miles. He sold his fk8 earlier this year and it isn't warm enough for bike yet, might be a long month for him.

IMG_20220313_121108_01.jpg
IMG_20220313_121100_01.jpg

 

Jeffers

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The broken ceramic on the plug could have been an indication of detonation.
 

racerguy180

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Ouch that blows.

The plug is the tell. Was it still white but broken, or discolored and broken?
 

Guitar_stitch

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Wonder how much tweaking was done to the base map... Would be curious to see what he had set up on there, as well as other mods, oil change history, etc.

Nothing a little JB Weld won't fix right up!
 


ValkenDnB

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So his engine decided to misfire on the ktuner basemap out of nowhere and boom? Or what detail is missing here
 

dark_knight097

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If the head is undamaged, I have a stock short block(49k miles) I'd be willing to sell for like 400+ shipping if he wants to save a bit of coin.

He'll need the timing components, oil pan, and sensors though as those were transferred over to my tsp block.
 

Design

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A sudden blow while cruising in high gear is (likely) due to a rod that was out of spec and cycled over time to full failure.

My guess is that it was caused by whatever event occurred in Cylinder 3 a month ago. Best of luck to your friend on the repairs.

 

 
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