my dads 95 talon AT has a spun rod bearing. it was driven like this for a while too. i took it apart and the #4 cyl rod was the one. we got new bearings for it but i think it needs a new rod to. because the rod can move sideways a good amount. about 1/8th inch.. so what does that mean? is the block no good any more or is just the rod grinded away from being driven like that? ?

91 civic hatch, homemade turbo+ LS motor = 12 sec street car.

New bearings are not going to do him any good. Have a machine shop inspect the parts and do the necessary repairs. But if there is actually 1/8 inch of slack between the side of the rod and the crank, both will probably need to be replaced.

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so if i replace the crank and just put 4 new(used) rods and pistons in with new crank and rod bearings am i guarenteed to be ok ?

91 civic hatch, homemade turbo+ LS motor = 12 sec street car.

Needs rebuild


Block and head need to be cleaned of all metal shavings from bearing

Crank is to be grinded down and polished

Oversized bearings will need to be purchased

Rod will have to be replaced


Good idea to replace all gaskets, orings, belts, ect...

Rebuild and clean oil pump or just buy a new one


and since you have the mootor apart, its not a bad idea to replace the rings, water pump, belt tensioner, valvestem seals...ect.



I spun a bearing in mine @ 60k miles and i did a complete overhual.

<--This is our god... god decides our fate. We shall not upset our god. God can and will ruin our lives if we were to upset him.

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id rather just buy a used crank from someone and used rods too cause i think the crank it has is kinda shot.

91 civic hatch, homemade turbo+ LS motor = 12 sec street car.

you can do that too.

I was luckey, as soon as my car started clackin away, i pulled over and called AAA and had them tow it to my house.

<--This is our god... god decides our fate. We shall not upset our god. God can and will ruin our lives if we were to upset him.

OBX 4-1 Ceramic Coated Headder, EGR Block-off kit, Howell 30% Underdrive pulley, EBay Cold-Air Intake, Holley Air Mass CatBack Exhaust System: 2.5" pipe w/ 5" tip

depends how bad the crank journals are scarred. If it looks pretty bad like gashes and stuff you'll probably need to get it machined. If its not bad you could try cleaning up the oil pan REALLY well and put a new bearing in just that one.

Your best bet is to just get another engine that runs. My MR2 had a spun rod and we just swapped the engine out on it. Thought 420A are harder to find than old MR2 engines I think O_o...

http://www.hadesomega.info -car specz and movies 95 Eclipse RS | 76' 280Z | 89' MR2 | 99 Neon | 91 Zephyr
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This happened to me. Just take the rods & crank to a machine shop. They'll check the rods to see if they need to be resurfaced. They'll check the crank & probably need to turn it. Then they tell you what size bearings to get, it's that simple. It'll cost maybe around $150. If you buy a used crank and throw it in there, it may be mildly out of round, which you cannot tell by looking at it or feeling it. In which case, it will spin the bearing again. Same case with the rod.

Easiest way is to take the rods & crank to a machine shop and let them tell you what needs to be done, no guess work.

~Luke
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1969 Cougar - 11.91 - 380HP
2007 GSXR 750
1999 OZ - SOLD - 15.26 NA - 14.71 on 75 shot

You have to replace the rod, because when the bearing spun, it will have enlarged the big end of the rod. If you put a new bearing it, it will be loose and spin again.

You will need to have the crank cut to the first undersize to remove the groves, and make sure the clearances are correct.

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1969 Cougar - 11.91 - 380HP
2007 GSXR 750
1999 OZ - SOLD - 15.26 NA - 14.71 on 75 shot

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
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-1998 Mitsubishi Eclipse RS-T- "Toy"
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-2000 Honda CR-V(daily)

Visit the Howell Automotive Open House August 20th, 2005. The largest gathering of Chrysler 2.0 engines on the planet.

US Small Business Administration Export Business of the Year for 2003

Visit Howell Automotive at www.howellautomotive.com

~Luke
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1969 Cougar - 11.91 - 380HP
2007 GSXR 750
1999 OZ - SOLD - 15.26 NA - 14.71 on 75 shot

The factory rods are fracture rods, and once egg shaped from a spun rod bearing they cannot be resized.

Visit the Howell Automotive Open House August 20th, 2005. The largest gathering of Chrysler 2.0 engines on the planet.

US Small Business Administration Export Business of the Year for 2003

Visit Howell Automotive at www.howellautomotive.com