ok, so I just heard a rod knock in my redtop SR. I am pretty broke and I need to know if this will work. I plan to get to the internals from the bottom and changing all 8 rod bearings. it is a small knock so I believe this should work. I know that each rod bearing is different and plan to buy the correct ones.
I need the opinion of a real tech
rod knock repair question.
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Hijacker
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'94 F-150 - Location: Fredericksburg, VA
I'm no real tech, but I've dealt with quite a few cars that have had rod knock. even "slight rod knock". Each one needed machining done to fix the issue.
The most recent one was a CA that had started knocking mid auto-x day. We turned her off, got the trailer out and took it back to the owner's house. Once we pulled the motor and got to the rod bearings, one had started to get flattened on the top curvature from oil starvation. It was a few steps from spinning.
All in all, the crank needed machining, and the rod needed reconditioning, and that wasn't a total spin. That was a slight knock.
What I'm getting at is that you should really consider seeing the extent of the knock, and make a judgement call on what you need to get done.
The most recent one was a CA that had started knocking mid auto-x day. We turned her off, got the trailer out and took it back to the owner's house. Once we pulled the motor and got to the rod bearings, one had started to get flattened on the top curvature from oil starvation. It was a few steps from spinning.
All in all, the crank needed machining, and the rod needed reconditioning, and that wasn't a total spin. That was a slight knock.
What I'm getting at is that you should really consider seeing the extent of the knock, and make a judgement call on what you need to get done.
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ricebike
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ask the resident technician,
zeroforum/23
but tenkawa stated most of this... if you're gonna tear down the bottom 1/2... might as well go all the way <shrugs>
zeroforum/23
but tenkawa stated most of this... if you're gonna tear down the bottom 1/2... might as well go all the way <shrugs>
swapping the bearings alone aint worth it. You'll need to figure out what caused it in the first place. With an SR, I'm gonna say almost 100% your oil pump or your oil pickup was the culprit.
When you pull the bottom end off, you're gonna see where the crank got burned and where the damage is, you'll want to get it magnafluxed to ensure no cracking and so on.
My suggestion for your situation, find someone selling their bottom end parts. This should be pretty easy since there are alot of folks redoing their bottom ends. Example: I was giving away pistons until no one wanted them anymore so I just sent them to a recycler. Rods should be pretty easy to find in good shape. You can also try replacing just the one that got toasted. The crank is a bit more difficult to find, but can be found. I sold my spare one a while back for $40, I'm sure you can find another guy willing to sell parts like that cheap. Then buy the bearings to match up with your new crank and old block. Unless your block got in on some of the action as well...
When you pull the bottom end off, you're gonna see where the crank got burned and where the damage is, you'll want to get it magnafluxed to ensure no cracking and so on.
My suggestion for your situation, find someone selling their bottom end parts. This should be pretty easy since there are alot of folks redoing their bottom ends. Example: I was giving away pistons until no one wanted them anymore so I just sent them to a recycler. Rods should be pretty easy to find in good shape. You can also try replacing just the one that got toasted. The crank is a bit more difficult to find, but can be found. I sold my spare one a while back for $40, I'm sure you can find another guy willing to sell parts like that cheap. Then buy the bearings to match up with your new crank and old block. Unless your block got in on some of the action as well...
Re: (180fan)
well the reason was im a dumbass and i have an oil leak. i guess it was worse then i thought. i amd changing all the rod bearing rightnow. the crank doesnt look bad at all. actually it looks fine. the bearing in cyl 2 is kinda ugly. so i went to a local nissan dealership and ordered them. they had them? maybe the sr20de is the same. but i just brought in my old one. we will see what happens. i am in search of bottom end **** with no luck. i dont have the funds to build it with aftermarket stuff. anyways thanks for the advice ill pos what happens since my crank seems fine.