spun rod bearings sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

driftaholic13 · 10-29-2010, 07:31 AM

Hi guys i got a little question if you can help..... my engine is going out, bad compression and etc.... I found one engine that has some upgrades: pistons, rings, head gasket for only 700 but has 2 spun rod bearings.....

Question one what makes rod bearings go bad?

Question two how much or haw hard is to replace them yourself?

Question tree is it a good deaL?

$nicklefritz · 10-29-2010, 07:47 AM

well oil starvation , improper installation are usually the reasons why your bearings took a shit
make sure the oil pump isnt shot
not very hard if you have the motor out the car

i think its a good deal because a have a sr short block in my basement
i can swap out a crank shaft and some rods if they are dunzo
basically yur taking a spin on the roulette wheel

godrifttoday · 10-29-2010, 08:23 AM

If I were u, I would pass...

***S14DB*** · 10-29-2010, 08:38 AM

Quote:

Originally Posted by $nicklefritz

well oil starvation , improper installation are usually the reasons why your bearings took a shit
make sure the oil pump isnt shot
not very hard if you have the motor out the car

i think its a good deal because a have a sr short block in my basement
i can swap out a crank shaft and some rods if they are dunzo
basically yur taking a spin on the roulette wheel

This,

Ether it ran dry or the bearings weren't sized properly. If it is an oiling problem there could be more damage to fix along with fixing the bearings. It could be just that they screwed the sizing and/or installation when they upgraded the pistons.

Pulling the caps and inspecting the bearings to see why they went bad is not to hard. There are guides online on how to read the wear to determine why they failed. If the rod bearings are gone but the mains are fine. I would think it is the install. Check the crank and caps for round and size and replace.

I would only get it if you are willing to part it out or rebuild the bottom end. When you pull the caps and all the bearings are galled to hell from no oil and the crank is out of round from running with shot bearings.

Hawiann22 · 10-31-2010, 09:36 PM

Spun bearings sometimes hit the head on sr

Mine did cost about 600 in rebuilding just on labor sooo pass or vacuum test head befor buying

10-29-2010, 07:31 AM	#1
driftaholic13 Zilvia Member Join Date: Nov 2009 Location: Las Vegas Age: 42 Posts: 261 Trader Rating: (2) Feedback Score: 2 reviews	spun rod bearings sr20det Hi guys i got a little question if you can help..... my engine is going out, bad compression and etc.... I found one engine that has some upgrades: pistons, rings, head gasket for only 700 but has 2 spun rod bearings..... Question one what makes rod bearings go bad? Question two how much or haw hard is to replace them yourself? Question tree is it a good deaL?

10-29-2010, 07:47 AM	#2
$nicklefritz Leaky Injector Join Date: Dec 2008 Location: new york Age: 40 Posts: 107 Trader Rating: (0) Feedback Score: 0 reviews	well oil starvation , improper installation are usually the reasons why your bearings took a shit make sure the oil pump isnt shot not very hard if you have the motor out the car i think its a good deal because a have a sr short block in my basement i can swap out a crank shaft and some rods if they are dunzo basically yur taking a spin on the roulette wheel __________________ VUIL-GEBOOSTED GANG$TA

10-29-2010, 08:23 AM	#3
godrifttoday Post Whore! Join Date: Jan 2004 Location: los angeles Age: 41 Posts: 3,120 Trader Rating: (82) Feedback Score: 82 reviews	If I were u, I would pass...

10-31-2010, 09:36 PM	#5
Hawiann22 Leaky Injector Join Date: Jan 2010 Location: Oklahoma Age: 33 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	Spun bearings sometimes hit the head on sr Mine did cost about 600 in rebuilding just on labor sooo pass or vacuum test head befor buying