SR Blown? Rocker Arms?

[benefitx]

Ok, im driving home from a friends house on the highway...all of a sudden i hear this repeated ticking noise...but it's only happening at around 3k rpms...i immediately switch gear, same thing...its like some rattling noise...

i take the next exit and pull over , pop my hood and all seems good , get back in my car and its not turning over...i try again , this time giving it gas...it turns over but i hear the loudest clanking sound, i turn it off...

i call my friend over , i turn it on again and its clicking still , so i drive to the nearest gas station and call a tow truck...shelled out 120$ and now my car is sitting in my garage, it's a redtop sr...

im thinking it might be rocker arms? or a bent valve...but the engine is pretty seized

i took off the valve cover and everything seems to be in order but i dont really know...my brother said maybe rod knock...

i could feel the vibration of the metal clunk in the clutch...maybe a bearing?

but ive taken all my wires off and im going to pull the engine tomorrow...

[HellonFire]

Probably spun a rod bearing.

Tyler

[benefitx]

i really dont know...when i idled the engine and had my friend listen , he said the ticking was from the valve cover...but the metal clunking has a vibration in the oil pan, idk...

[benefitx]

if it was a spun rod bearing the rod would be out of my block because i drove the car like 2-3 miles to the gas station

[HellonFire]

Take a screwdriver if you want and you can pinpoint where the noise is coming from using it and holding it up to your ear.

But, I would just pull the motor and tear down the bottom end. That way you could possibly get away with only replacing the bearings if everything else is good.

Tyler

[benefitx]

engine should be out by tomorrow...lets see, i gotta take off the head to see anything right?

[benefitx]

spent last 3 hours unhooking everything , just need to pull it out...and i got school tomorrow , shit

[benefitx]

could i get to the bearing by just removing the oil pan?

[HellonFire]

Don't have to take off the head.

Drain the oil. If there are metal shavings in there its a dead giveaway.
Then flip the motor over, take off the oil pans, and you should be able to see right away. If not, pull the main cradle off and you can get to anything.

Tyler

[benefitx]

thanks alot tyler...it should be out by today...now i need an engine stand..

[nassin31spr]

Did you check the chain tensioner guides. Some times that plastic guide brakes and gives off the worst clacking noise, very similar to bearings. Hows your chains tension?

[benefitx]

also whats a good rear bumper for a hatch?

http://img143.imageshack.us/img143/14/picture010lb1.jpg (http://imageshack.us)

[benefitx]

chain tension is good...but the car was not moving at all , flooring in 2nd gear it was going nowhere...and the rattling noise is very rapid even on idle, i dont think you can hear rod knock on idle unless you rev it?

[benefitx]

this would be my first engine build...so if i ask dumb question's mind me..

after the engine is taken out ,i take off the oil squirters for the cams , take out the cams...take off timing chain..unbolt head bolts...remove the head?

[benefitx]

i am almost positive its rocker arms or bent valve

[drifting_changed_mylife]

is the engine seized compleately?? fuck man thats my worse nightmare! good luck with that bro

[benefitx]

it will turn over if you give it gas after like 3 times , and then you need to keep giving it gas to keep it alive , but its scary since the rattling is so damn loud...i really dont think its rod knock.

[drifting_changed_mylife]

do u know what i hear is a good way to see if ur engine is fucked. to drain ur oil and sift in in a while and see if you got any shavings or metal particules in it. but from the sounds of it, it looks like you know more about what ur talking about than i do!:hs:

[JJ240]

knocking sound+turns over hard is almost garunteed a toasted bearing. pull it drop the oil pans, pull the girdle, and maincaps then rodcaps. your culprit should be staring you in the face.

[benefitx]

will do...but im just gunna pull the entire engine...need to pressure wash my bay anyways.

[benefitx]

what would high revving cause? im almost certain the noise is from the head...

[Big Bronze Rim]

what would high revving cause? im almost certain the noise is from the head...
My friends car that spun a rod bearing sounded like its knock was coming from the head. Typically if it wont turn over the way you say, its probably bearing related due to the added drag of the wasted bearing(s) and journal(s). Even if you had thrown a rocker arm, the engine would still turn over. And before you pull it apart, do your self a favor and get a copy of the FSM and follow disassembly to the T; use it as your guide! Thats what its for. If you don't you WILL make things worse and ruin things that would have been ok.

[benefitx]

for starters im going to take off the oil pan. if i see a bearing in the oil pan , problem solved right?

[benefitx]

so is my whole bottom end fucked or would i just need bearings?

[benefitx]

just drained the oil , no metal shavings at all...but still cant be for sure since the pickup catches shavings i guess

[Big Bronze Rim]

You're probably not going to see a chunk of bearing in the pan, but you may see a metallic tint to the oil. If the bearing is spun bad enough that its knocking so severly and its tightened up the engine, you will probably either have to have the crank turned undersize and use undersize bearings or replace the crank. The best you can hope for is that it can be polished, but either way, you will have to pull the engine and tear it apart, pull the crank have it machined/polished/replaced and rebuild.

[benefitx]

can i not just buy a crankshaft...


i did overrev the engine at 7k.

[benefitx]

http://cgi.ebay.com/ebaymotors/sr20det-sylvia-s13-red-top-crank-shaft_W0QQcmdZViewItemQQcategoryZ33616QQihZ018QQit emZ280111105365QQrdZ1QQsspagenameZWDVW

http://cgi.ebay.com/ebaymotors/ACL-Nissan-SR20DE-SR20DET-Rod-Main-Bearings-Kit-SER-G20_W0QQcmdZViewItemQQcategoryZ33619QQihZ008QQitem Z180113133054QQrdZ1QQsspagenameZWDVW

so if it really does turn out i spun a bearing i would have to buy those two? what else

[HellonFire]

Depends on what bearings spun. If you spun a rod bearing most likely you will need a new rod as well.

And I would get a new oil pump, and make sure you change your oil filter.

Tyler

[benefitx]

nevermind , took off my oil pan and found all of this.

http://img180.imageshack.us/img180/7484/picture018fz4.jpg (http://imageshack.us)

[HellonFire]

Probably spun a rod bearing.

Tyler

:hsdance:

But really, if you didn't get on it too bad after you noticed the sound, you might be able to get away without doing anything but replacing bearings. But depending on how bad the damage is, you might need a new rod, or if those are mains, you could have fucked up your block.

Tyler

[benefitx]

i heard the noise, it was very minute when i noticed it.

i put the car in neutral and cruised to the next exit...tried to start the car and it would not , i got it to start and drove at 1500 rpm's to the next gas station maybe 3 miles going like 10 mph.

but by the time the car got in my garage i started it one last time and it was like gunshots.

http://cgi.ebay.com/ebaymotors/SR20DET-OEM-Pistons-Connectiong-Rods-Pistion-Rings_W0QQcmdZViewItemQQcategoryZ33623QQihZ005QQit emZ150118663083QQrdZ1QQsspagenameZWDVW

[HellonFire]

I have like 3 sets of stock pistons/rods if you need those. But what I am saying is, you need to find out if it was a rod, or main bearing.

Rod bearing: Would just damage rod, and possibly crank. Which would leave you needing a new crank, rod bearings, and rod.

Or if it was a main.. Then you could have scored the journals and have to get a whole new block.

I pretty much have any part you need, just let me know.

Tyler

[benefitx]

alright cool tyler...how would i find out though? i only took off the lower pan, cant really see shit..maybe if i take off the oil pump, i think it was the 1st cylinder

[benefitx]

i guess whats next is lowering the crossmember and take off the upper pan..

[HellonFire]

I thought you were going to pull the motor? Either way you need to pull the motor, so just go ahead and do it. Then get it on a stand so you can flip that bitch over and look inside. You need to take off the upper pan and the cradle.

Tyler

[benefitx]

the motor is 95% ready to be pulled , just need to take off the clutch slave. its being a little whore.

[benefitx]

tyler how much for the rods and pistons that you have? do you have a spare crank too?

[benefitx]

im gunna go ahead and order these

http://cgi.ebay.com/ebaymotors/ACL-Bearing-set-90-01-SR20DET-FREE-TORCO-LUBE_W0QQcmdZViewItemQQcategoryZ33619QQihZ015QQite mZ250094585329QQrdZ1QQsspagenameZWD1V

in STD size

[benefitx]

anyone have a FSM?

[benefitx]

what else would i have to buy to get my engine running again?

[lazierhobo]

dont order bearings till you determine which bearing went bad, and if your going to get the crank ground, or buy a new one. it might be cheaper to get it ground.

[benefitx]

i think im just going to drop the block off at a shop..

but if its really not that hard as the FSM makes it seem , measuring and stuff , ill do it myself...

i have all the tools , like a micrometer (my dad owns a machine shop...cnc machines in the basement n shit)

but can i not just put the block on an engine stand , take out the girdle and crank , pull the piston/rods and change the bearings?

[HellonFire]

Yes you can. But you have to determine what size bearing you need. I might have a spare crank. I'll have to see if I need it or not.

I'll sell those pistons for $85 for the set.

I can do all the work for you, except for grinding the crank if you are going to go that route. I can also garantee I will be a lot cheaper then any shop.

And you can trust my builds as well.. I just built 2 SR's and a friends. So its fresh on my mind.

Tyler

[benefitx]

wouldnt i just need standard size bearings? why would i need bigger...i dont know?

[Big Bronze Rim]

wouldnt i just need standard size bearings? why would i need bigger...i dont know?
You can't order bearings until the engine is apart. If the crank has to have work done you will need undersize bearings, nissan makes them as do Clevite. Also, if you can use stock sizes, you wont know what colors to order until you see the markings on the crank and block. So wait on the bearings.

[benefitx]

oh i see...i talked to a couple shops they said i need the block machined