ok so i finally got some time to take the tranny off my s5 tii engine. So when i went to take it off i noticed that one of the bolts must have been cross threaded into the block and split the very thin metal surrounding it. I've included a picture were the bolt goes on the transmission but it is the area on the block around the bolt that has split. It didn't seem like such a big deal but i though i would post to make sure.

 

ok here are some actual photos... Is my engine destroyed? oh i thought i would post a pic of the car before it goes under the knife.

 

throtle that **** till it dies. its perfectly fine.

 

ya i didn't think it was that big a deal. Just me being paranoid.

 

+1

 

Don't think that cracked from someone cross threading it, but rather from detonation. If I were you, I would just replace the rear iron then risking the crack reaching the oil passange over time. Once that happends.. you will have a mess of oil in the engine bay along with a trashed engine.

Just replace the iron, and two coolant seals. Pull the engine, put it on a stand facing down, (pully close to the floor, rear end up) and take out the tention bolts in squence. Swap the rear iron, change the statationary gear and oil pressure regulator into your new iron. Replace the two coolant seals and the oil-ring on the oil passage. Do not spin the engine when you have the rear iron out. Reassemble and and you should be fine.

Everything shouldn't cost you more then 100$. 40 for seals and o-ring and leaves 60$ for a rear iron.

 

I would get it welded if possible.

 

That's not detonation... not even close.
See it all the time, N/A's and TII's. Think N/A's detonate?

I see it all the time when torque specs aren't followed and someone over torques that bolt. Usually the piece cracks right off.
Take the car to a welder, have it welded, chase the threads with a tap, and reinstall the bolt with antiseize on it, to the proper torque spec.

I can't believe anyone would suggest taking a motor apart for something with such a trivial fix.

 

Well at least it gives him options. He could also do a V8 swap lol.

 

ok thanx guys. I guess ill just see if i can get it rewelded and tapped.

 

No not another V8 swap suggestion!

 

Detonation severe enough to break the rear iron on an NA? Yet not severe enough to break the several OTHER weak spots that commonly go or damage an apex seal? I doubt that very much.

Please don't post if you don know.

Suggesting someone tear apart an engine for a superficial crack is not very nie. The crack is completely external to the block and even if it did get larger it's HIGHLY unlikely that it will "jump the gap" made by the bolt hole and travel into the block.

No comment.

Welding on cast requires very specific proceedures to avoid cracking later. The part must be preheated, cleaned VERY well, welded and then post heated to bring the temperature down gradually. None of this is possible with the engine assembled and even it it was the localized heat from the welding will likely damage the outer coolant seals.

 

ok thanx Aaron. Ill just leave it alone and pretent it is not there.

 

it will buff right out

 

i had that happen to my TII except it completly broke off.....and i drove it till it blew up. another 6,000 HARD miles. dont worry, it will be fine. if your that concerned about it, get a smaller bolt and nut with a fue washers and go that route.....i just left it alone, i knew i was going to blow my motor anyway, but you have what? 4 or 5 other bolts holding your tranny to the motor. from personal experience dont worry about it. hope this helps.

EJ

 

helps alot thanx ej