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Short block gone to sh*t!

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7.5K views 79 replies 19 participants last post by  btrux06  
#1 · (Edited)
welp bad bad day for my dsm, just as i was getting ready to go out tomorow and improve on my last weeks run, my motors got a nice loud roaring sound coming from the bottom end, sounds like some kind of bearing failure not sure.

history of the block, was bought as a built longblock from slowboy just last summer. it was bought by my buddy and he had it in his car for not even 1500 miles before he unfortunitly totaled his car, so after sitting a couple months the motor went into my car. has been in for about 5 to 8k miles, he did mobil one oil changes as did i a few times at least every 3000k miles.

i got in it today and took it out for the first time since tuesday, was running and sounded good/normal. went home did a mobil one oil change, tryed that new 10k mile shit, thats probably what jinkzed it, new plugs, and toke it out and was running ok then only like 5 10 miles later after not even getting on it yet, i rev it to see how much boost im getting at my 5250 stutter box setting and i here the awfull roaring sound. sounded ok at idle, then was really noticeable at rpms over 3000 and louder the higher up. sounds like my other buddys motor did recently went it had the oilpump bearings fail, the oil pump would barely turn over only with force of a wrench or as did the timing belt.

brought it home, timing belt was timed good/normal still. toke it off and oil pump feels fine as does the crank. so im assuming im pretty much screwed, what u guys think happened? im sure it going to need a bit of work at least. hopefully the rods and pistons are ok. damn just when i was looking forward to breaking some mid 11s. not that i totally mean to blame slowboy here but come on the motor was well taken care off and less then 10k miles on it. he didnt even finish breaking it in or like he never raced it or really beat on it. i broke it in again for 500 plus miles then started putting it too use, i never trapped over 113 mph so probably wasnt even making 400 hp and its suppose to be good to 600. i dont know this sucks :mad:
 
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#2 · (Edited by Moderator)
Re: short block gone to sh*t!

hey, id suggest taking the oil pan off and checking everything out, i cant really tell what the roaring sound means for lack of description but i wouldnt sit there putting the studder box to the test if its still making the sound :D check the crank...take pictures of anything weird, or remanufactured. Just call the builder up and see what they can tell ya.
 
#3 · (Edited by Moderator)
Re: short block gone to sh*t!

well ya no shit, i drove it straight home after i heard it and pulled it apart. ill probably pull the top end off and pull the pistons and rods out tomorow afternoon and check over everything.
 
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#5 · (Edited by Moderator)
Re: short block gone to sh*t!

Just check everything out.... That's all that you can do for now and find out what's wrong and see if it is their fault or not..........and if it is then give them a call and I'm sure that you will get good results. I hope that nothing major is wrong and good luck to you.
Shane
 
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V
#6 · (Edited by Moderator)
Re: short block gone to sh*t!

It sounds as if you're not quite sure what is wrong yet. While I certainly won't candy coat it like the last post here, I would say that you shouldn't have made mention of the shop yet.

Take her apart first, based on what you heard and see what's up, then you can say that "someone" used some shit parts or whatever. Even then, 10k miles is a little much to warranty a "race" block though, imho.

BTW, this isn't advanced. :D The mods are gonna move it for ya.
 
#7 · (Edited by Moderator)
Re: short block gone to sh*t!

im thinking it has to be worn or bad rod or main bearings. i plan to put it all apart tomorow and ill get some pics of everything and post some up if i find anything interesting.

perhaps its only a oil pump bearing or something to do with that. i dont knowing much about the internals as far as the oil pump goes on our motors. can i replace the oil pump just by chance it went bad or making noise? i hate to pull the rods and pistons out to find nothing wrong with them or the bearings.
 
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#8 · (Edited by Moderator)
Re: short block gone to sh*t!

Van said:
It sounds as if you're not quite sure what is wrong yet. While I certainly won't candy coat it like the last post here, I would say that you shouldn't have made mention of the shop yet.

Take her apart first, based on what you heard and see what's up, then you can say that "someone" used some shit parts or whatever. Even then, 10k miles is a little much to warranty a "race" block though, imho.

BTW, this isn't advanced. :D The mods are gonna move it for ya.
Click to expand...
I did not candy coat anything. He does not eaven know what's wrong with it yet so please don't do any vendor bashing it might not eaven be their fault, let's try and keep this thread open so we know what the result is.
Thanks
Shane
 
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#9 · (Edited by Moderator)
Re: short block gone to sh*t!

Spoolin69 said:
He does not eaven know what's wrong with it yet so please don't do any vendor bashing it might not eaven be their fault, let's try and keep this thread open so we know what the result is.
Thanks
Shane
Click to expand...
I agree. This maybe a stupid question, but could something got jarred loose (or off center) when your friend totalled his car with that engine in it? :confused:
 
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#10 · (Edited by Moderator)
Re:short block gone to sh*t!

ever heard of a internal bearing failure 10 miles after a oil change with the new mobil one high milage oil? im going to stick with its just a quincidence. ya i cant spell
 
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#12 · (Edited by Moderator)
Reshort block gone to sh*t!

i1nk83 said:
do you have air conditioning in your car? if so check the ac compressor. mine started making an horrible noise the other day and they the compressor seized up so check things like that too.
Click to expand...
i tore it all down to just timing belt and still made the bad sound. oil pump and crank felt nice and free. oil pans off now and everything looks good and no metal flakes or anything, im working on pulling the head off now and pulling the rods out. ill update in a little bit
 
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#14 · (Edited by Moderator)
Re: short block gone to sh*t!

ya i wiggled them and they had some play, not sure how much is normal and i dont have a feeler gauge, any idea how many thousands i should be able to stick in there between the rod and crank? cant find my haynes, ill try to go buy a feeler gauge and test them before i pullem out.
 
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#16 · (Edited by Moderator)
Re: short block gone to sh*t!

all 4 have some side to side play, im going to get a gauge to see how much. also i found the oil pump isnt spinning over like it should, it turns over but the at the same force the whole way around, its suppose to either spin right past the alighment mark, or when u let it go its suppose to kick back to the alighment mark. so mabby i will replace that first and through it back together and see if the noise goes away.
 
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#19 · (Edited by Moderator)
Re: short block gone to sh*t!

ya the most i got from the 4 was 8 thousands, so they should be fine.

i tourqed the flywheel bolts on with my air tools, doubt they came loose, i reached up int there and the flywheel feels tight. if all else fails ill pull the tranny. one of my friends also said to check that too.

1st i think im going to try swapping out the oil pump with a good one from my last used block, the oil pump on it feels alot different and better then the one on there now. the old one on my last block will spin back on it own like a good 90 degress, my oil pump in my car now doesnt have any natural or normal spin back. the car had good oil pressure i believe last when i drove it home.

i spun the oil pump with my drill on the old block and it sent a good vibration through the block due to the natural un balance of it i guess. one on my car doesnt do that and spun over like it was balanced and didnt feel like it should
 
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#20 · (Edited by Moderator)
Re: short block gone to sh*t!

oh ya it does have the balance shafts removed so i guess the oil pump is normal, damn was hoping that would be all it needed. know what?
i really dont think its flywheels bolts coming loose, feels tight and just doesnt sound like that
 
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G
#21 · (Edited by Moderator)
Re: short block gone to sh*t!

btrux06 said:
i really dont think its flywheels bolts coming loose, feels tight and just doesnt sound like that
Click to expand...
You verified this with a torque wrench ? You better narrow down all possibilities before placing blame on a vendors quality and craftmenship. I'm just generalizing here.
I read enough SBR posts recently to make my own conclusion about that shop. This though might not have nothing to do with them.
 
V
#22 · (Edited by Moderator)
Re: short block gone to sh*t!

Spoolin69 said:
and if it is then give them a call and I'm sure that you will get good results.
Click to expand...
Read my post again as I was most definitely not vendor bashing. I was actually "defending" the assclowns in a way. To some people the above statement is candy coating.

Now, the above post about the balance shafts being removed is relevant and correct. However, the oil pump sprocket should spin smoothly with almost no resistance. Not being able to hear the noise, I'd recommend that you inspect the oil pump to be sure, especially if you already have the front of the engine tore down. If that block was assembled with a Topline oil pump then I'd definitely check it. Check the oil pump sprocket for any unusual looseness.
 
#24 · (Edited by Moderator)
Re: short block gone to sh*t!

i did just put int my new aluminum flywheel in may and i have heard storys of them coming loose before so ill check them next, then mabey try another oil pump but i think mines normal how it is since it doesnt have the balance shafts.
 
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#25 · (Edited by Moderator)
Re: short block gone to sh*t!

btrux06 said:
i did just put int my new aluminum flywheel in may and i have heard storys of them coming loose before so ill check them next, then mabey try another oil pump but i think mines normal how it is since it doesnt have the balance shafts.
Click to expand...
Did you use the stock flywheel bolts? If so, then I bet they loosened up. You have to get longer flywheel bolts.
Later/joe
 
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