sad day in my little world

[lsaint07]

three years ago i bought my first turbo car(little did i know what a supra can do or yet along what a surpa was) for cheap. It had a leaking turbo and i (with the help of a friend of mine) took the turbo to get rebuild. I installed it that night and took it for a test run. 20psi and did that bad boy move dispite fuel cut. I was the best feeling in the world. the next night we went to the streets and found a s2k on boost doing 10psi and smoked it. little did i know i was runing way too rich and later that week the well know knock happened. the previous owner got away with no know because of his turbo was leaking and he just kept adding oil so the oil was fresh every time. when i drained the oil it semelled like gas and thats what caused it to go bad, what i came to my conclusion of what happened.

two 1/2 years later i finally get it back together and with s-afc,fcd, acl bearing, machine work, the whole nine yards. well needless to say i guess the machinest didn't do to good of a job and didn't get all the metal shaving out because i got the knock again two months after i get the car one road but this time it was worse. I tried to get off the interstate as fast as i could but no luck. the rod went through the engine block about the size of a baseball. i was going roughly 80mph at 2500 rpm when the rod went.

back to the board. this time its going to be a 2j or 1j. don't know ye and also about another couple years.:cry:

89 7m-gte is going to the scrap metal yard and hello jz world.:biglaugh:

 

[hvyman]

bummer man got any pics?

gl with that.

 

[slowpra na-t]

im starting to think its just the acl bearing... i rebuilt a 7m using acl bearings and just couldnt get the oil pressure within spec, pulled the engine put toyota bearings in and got perfect pressure just swapping bearings. acl clearances are way too big!

 

[lsaint07]

I have no pic. I just had to walk away before i lost all hope and trash the car or sell it. Ill take pic on an oncoming week whe i pull the motor out. I just needed to breath and gather my thoughts.

as far as the bearings i dont know. there are a couple of things i think could have gone wrong. Bearing one of them and the other is the machine shop only charged me $40 to clean my block. that was weird, i told him that i needed it super clean cuz i had metal shaving in it already so i dont think he vatted the block. also when i had my pistons done he didn't catch that the dome were different. the part store fubar and gave me 2 wrong pistons. so i dont know how good his word was. i asked him to make sure the pistons where balanced and i don't think he did that. I just wanted to make sure everything was good to go, to try and avoid this problem. I will never take my machine work to mainly domestic shop or arrogent(misspelled) person. I don't think he took my job/work/block/etc. serioulsy. oh well lesson learn.

 

[CyFi6]

Do they warrenty their work?
STD size bearings seem to be about .001" thinner than toyotas largest offered bearing... And when clearances are already supposed to be in the .001"-.002" range, it opens up your clearances. Chances are he threw STD bearings in there with little to no work, or did it and polished the crank, opening up the clearances even more. Not saying this was your problem, but just commenting on what slowpra said. Sucks man, go back to them and tell them they fucked up.

 

[mdr40z]

these things aren't rocket science.
Did you follow a proper break-in procedure? Supporting mods and a good tune?
A xj motor isn't going to help any of that.

 

[lsaint07]

I don't think he will even remember me to be honest. I keep going to his shop trying to get the pistons so i can install and he never had them done when he said he would. so its going to be a waste of time.

as far as breaking in the motor i took it easy the first 700 miles to give the kevar clutch and motor a good break in. I used 10w30 royal purpel the first 700 miles and then 15w40 royal purpel. i was right at 1500 give or take when this happened. i was about to get the car tuned this weekend coming up but i guess not anymore. i was only pushing around13 psi when it poped.

 

[Rennat]

wtf were you using 15w40 for in the 7m????

and why did you use royal purple to break in a motor???

you obvisouly didnt talk to your machinist about breaking in the motor...

 

[mdr40z]

I thought as much, no supporting mods either?
Why are you suprised it blew and why do you think another car, motor, etc will make a change.
My money has you running around the streets of hotlanta draggin every Honduh with a fart can in a 20 y/o pos with bald tires and bad brakes. Sorry to flame but my sis lives in Atlanta and you appear to me to be another d/a kid with a 'hot' car waiting for an accident to happen and give your mama a bad day in her 'little world'. Think about it.
and if I'm wrong in my opinion please forgive me

 

[lewis15498]

so you put in oil that was too thick to begin with, and then ran it too hard for way too long, then you got the bright idea to put even thicker oil in it and run it harder?! Not to bust your balls too much but i dont think your machinist or the bearings you used were to blame. Next time read up on breaking in a motor before you attempt it.

 

[Mk3runner]

This is a epic thread!

LOL, ok that sucks. But read up next time

 

[lsaint07]

so you put in oil that was too thick to begin with, and then ran it too hard for way too long, then you got the bright idea to put even thicker oil in it and run it harder?! Not to bust your balls too much but i dont think your machinist or the bearings you used were to blame. Next time read up on breaking in a motor before you attempt it.

well, yea.. i did just about all the work to the car and was pretty much reading the repair manual book and missed the chapter on breaking in the motor. the spec on it is 20w50 so i figured 15w40 would be too thick but i guess i was wrong...no kinda love...my bad...first motor that i blow...first motor ever put together...i love working on the car it gets me away from thinngs...my wife keeps telling me that i love the car more than her...but more than likely everyone knows how it goes with females and cars...but back to the oil thing what would have been the better breaking in process...i really don't know i guess.. but i live and learn and get my money together and go bigger and better for next time. there is always room from improvement. where did i go wrong.

What weight should have i used?

how long before the first oil change?

I should have keep it under what rpm?

any info would be great so i or someone else reading wouldn't do the same mistake i did.

thanx

 

[lsaint07]

I thought as much, no supporting mods either?
Why are you suprised it blew and why do you think another car, motor, etc will make a change.
My money has you running around the streets of hotlanta draggin every Honduh with a fart can in a 20 y/o pos with bald tires and bad brakes. Sorry to flame but my sis lives in Atlanta and you appear to me to be another d/a kid with a 'hot' car waiting for an accident to happen and give your mama a bad day in her 'little world'. Think about it.
and if I'm wrong in my opinion please forgive me

well you are wrong. I didn't waste my time with hondas not worth the gas. bald tires, no. brand new. Brakes, also new. And i'm not a kid and i take care of my mom and wife. I'm just another guy trying to have a little fun with my car, turn the wrench to get away from things. just a hobbie i like and learning to love. But for your family (your sister) it's better to lock her doors i heard of a lot of breaking into houses and robbing depending what area she lives.

 

[jetjock]

I won't comment on this thread full 'o fail other than to say although not optimum the type and viscosity of oil used had nothing to do with your problem.

 

[lsaint07]

I won't comment on this thread full 'o fail other than to say although not optimum the type and viscosity of oil used had nothing to do with your problem.

what caused it?

 

[mdr40z]

well you are wrong. I didn't waste my time with hondas not worth the gas. bald tires, no. brand new. Brakes, also new. And i'm not a kid and i take care of my mom and wife. I'm just another guy trying to have a little fun with my car, turn the wrench to get away from things. just a hobbie i like and learning to love. But for your family (your sister) it's better to lock her doors i heard of a lot of breaking into houses and robbing depending what area she lives.

apologies extended, I'm just so sick of these cars getting trashed and the blame thrown on the sickly 7M design or durability.
She's actually far north east, no troubles there, thanks

Oh, and causes? IMO probably lacking supporting mods, bad tune, low oil, something along those lines.... any of those with a period of time at redline can cause boom

 

[steveaw11]

Im no expert on the 7m in fact im still reading and learning, but I can say you running a synthetic to break in the motor is a no-no for trying to properly seat your piston rings.

And while that might not have anything to do with your newly aquired hole-in-block, Maybe you should have changed your oil & filter after a warm up cycle to clean out all loose debris in the motor before driving it. Then *I believe* you change the oil and filter at 50, 250, 500, 1000, then finally at 1500. Then swap to your synthetics.

BTW im in GA and 15w40 is way to thick for our climate. Hell in my 20v 4age I run Redline Oil, 5w30 most of the year and 10w30 in the summer, and this motor sees redline at almost 9k every other day, no issues yet.

 

[Mk3runner]

Someone has a silvertop 4a

But yea, there's multiple things that was done wrong. Live and learn

 

[steveaw11]

Someone has a silvertop 4a

But yea, there's multiple things that was done wrong. Live and learn

Yep on a Blacktop 4a Ecu for the agressive ign timing and fuel maps.
Makes for a damn fun daily driver. :icon_bigg

 

[paradox616]

i used ACL bearings in my 7m, clearances seem to be perfect

you know your supposed to run a mineral oil round the block then dump the fluid after the first test drive.... as alot of the shavings that come from the bores after a honeare too fine for the filter to pick up and if they reach your bearings they will destroy your bearings completely fucking you clearances...

i find it funny that people build a motor, expect its bullet proof, abuse it, break it and blame it... no motor is bullet proof