timing belt slipped causing the number one cyclinder piston to hit the spark plug breaking the spark plug.. No compression on the number one cylinder.. can it be bent valve ? crack piston ? ...need help and suggestion .. better off with a new head ? or long block ? thank you

b20v stock .....

 

the valve is bent to hell. Need to get a couple valves.

 

Along with valve damage, your cylinder walls are most likely scored by the broken spark plug material. Take off the head and examine cylinder #1. If its not too badly damaged, you can have a machine shop bore and hone to repair the damage.

 

so basically rebuild the head. .. ?

 

thank bro.. . ima pull the head out soon ill keep you updated...

 

It might not hurt to throw seals, in it while it's all apart. It would suck to do all that work, put it back toghter and discover another issue down the road. Well, if you can swing the money, and plan to keep the car for a while.

If not, simply replace the damaged Part(s)

 

havent took off the head yet ..but as i was looking around inside the head .. .. i seen that the valve spring retainer broke right in half ... can the head be rebuild ? might have a dropped valve ? im not sure how to check unless i take the head out ? or idk ..

 

You broke the retainer!?

I have never heard of this ever happening. Were you rev'ing the **** out of it when it happend?

Honestly, without having the head in front of me, I can only be so much help. It would be best to pull it aprat an run down to a machine shop.

 

Aftermarket retainers? I can only imagine what the other side of the head looks like. Pull the head off and take a look at the valve seats & compression chamber.

 

nah stock retainers..... but okay ill update soon as i take the head off

 

Heres pics of the head and piston.......fosure the head is done... just wondering if i can still use the bottom block with all that scuffing on the piston .. idk ? or am i better off with a whole new long block










and cylinder wall #4 has super small scuff on it.. the rest is ok

 

any body ??

 

...

 

Head is looking ****ed. I've seen worse, but that's not good.

You could reuse the block, however should replace the damaged piston(s)

You could do a rs machine ITR replica piston, and keep the block. Assuming there's no damage to the walls.

 

walll looking good but has one small minor scuff in the #4 cyclinder

 

Scuffs aren't horrible, i've seen some pretty ****ed walls fixed. You may end up having to bore it slightly, but you never know. A hone could be all you need.

 

As 98civdx said, the head is toast.

The block doesn't look bad. If you run your fingernails across the scuff, does it catch? Its hard to tell from the pix but there seems to be some light dmg to the top of the sleeves. The machine shop may have to deck the block to make sure its flat. To be safe, i would recommend to bore the block -- especially if its a high mileage block.

 

i might need some pistons... whats the worst can happen if i was to use the piston how it is ... all scuffed up... and get a used head...

 

am i better off rebuilding the motor or getting a used long block .....

 

Depends. How high did you rev this one?
Budget?
Goal?

I go 2.1 high comp b20 vtec, with some good cams. But that's just me

 

my goal for now is just to get it running .. till i find a job then go crazy lol ... im on budget idk how high but i think i down shifted to 2nd gear on accident then timing jump.. but sh*t .. the bottom block i think i can still use .. but i dont wanna put everything together and it f**ks up again