Narrowed down my knock today
Thread Starter
Supreme Member
iTrader: (2)
Joined: Jan 2005
Posts: 3,058
Likes: 0
From: 707
Car: '92 Z03
Engine: LSX
Transmission: M12
Narrowed down my knock today
Well gang, today I finally got a full day to just work on my 'ROC and I found out what my knock was.
If I pull the #4 cylinder plug wire and rev the engine, it revs, no knock.
If I put it back on and rev it past 1500RPMS or so, knock knock knock.
So anyways I spoke to my engine guru and he stated that I probably have a piston which is rocking in the bore opposed to a rod bearing out because my oil still looks good, still gets good oil psi.
Needless to say, my 'ROC is flying with no motor / trans as we speak.
If I pull the #4 cylinder plug wire and rev the engine, it revs, no knock.
If I put it back on and rev it past 1500RPMS or so, knock knock knock.
So anyways I spoke to my engine guru and he stated that I probably have a piston which is rocking in the bore opposed to a rod bearing out because my oil still looks good, still gets good oil psi.
Needless to say, my 'ROC is flying with no motor / trans as we speak.
Banned
Joined: Jun 2003
Posts: 1,377
Likes: 0
From: Orangevale, CA
Car: 07 Silverado
Engine: 5.3L V8, flexfuel E85
Transmission: 4spd. Auto
Axle/Gears: 3.73 locking diff.
Well, at least you found out what was wrong. How long do you think it will be until you get that thing running again?
Thread Starter
Supreme Member
iTrader: (2)
Joined: Jan 2005
Posts: 3,058
Likes: 0
From: 707
Car: '92 Z03
Engine: LSX
Transmission: M12
Well, I'll have the block back by next week supposedly all built up and I guess the time down depends on whether or not I want to do that T56 swap while everything's out
Thread Starter
Supreme Member
iTrader: (2)
Joined: Jan 2005
Posts: 3,058
Likes: 0
From: 707
Car: '92 Z03
Engine: LSX
Transmission: M12
Yeah that's exacta-tic-ly what I was thinking.
Plus I have an extra T5 + shifter & shift plate that I am selling, and I already have a buyer for my complete T5 that's in the car now, so that practically pays for my T56
Plus I have an extra T5 + shifter & shift plate that I am selling, and I already have a buyer for my complete T5 that's in the car now, so that practically pays for my T56
Trending Topics
Banned
Joined: Jun 2003
Posts: 1,377
Likes: 0
From: Orangevale, CA
Car: 07 Silverado
Engine: 5.3L V8, flexfuel E85
Transmission: 4spd. Auto
Axle/Gears: 3.73 locking diff.
Lookin good. Can't wait to finally see her on the road, glad to see you are doing the tranny swap now.
Banned
Joined: Jun 2003
Posts: 1,377
Likes: 0
From: Orangevale, CA
Car: 07 Silverado
Engine: 5.3L V8, flexfuel E85
Transmission: 4spd. Auto
Axle/Gears: 3.73 locking diff.
Crossfire them for you, lol. You come up with some crazy **** Vin. Oh, none of your pics are working, just nice little red x's. Joined: Jul 2002
Posts: 2,789
Likes: 0
From: NOR CAL USA
Car: 89 iroc-z 5.7tpi 350,
Engine: 5.7tpi 350,
Transmission: T-56
its easier to do it with a motor trust me ask me how i know
its also kind of required let me know if you need help converting
eric
its also kind of required let me know if you need help convertingeric
Thread Starter
Supreme Member
iTrader: (2)
Joined: Jan 2005
Posts: 3,058
Likes: 0
From: 707
Car: '92 Z03
Engine: LSX
Transmission: M12
Will do man, I appreciate the support everyone on here has given me 
The only problems I really see are the fact that I want to keep my stock speedo. How accurate is that Cable X thing? Is there any other way to go around that or did you install the Autometer Electric gauges?
The only problems I really see are the fact that I want to keep my stock speedo. How accurate is that Cable X thing? Is there any other way to go around that or did you install the Autometer Electric gauges?
Joined: Jul 2002
Posts: 2,789
Likes: 0
From: NOR CAL USA
Car: 89 iroc-z 5.7tpi 350,
Engine: 5.7tpi 350,
Transmission: T-56
Originally posted by vindeezl
Will do man, I appreciate the support everyone on here has given me
The only problems I really see are the fact that I want to keep my stock speedo. How accurate is that Cable X thing? Is there any other way to go around that or did you install the Autometer Electric gauges?
Will do man, I appreciate the support everyone on here has given me
The only problems I really see are the fact that I want to keep my stock speedo. How accurate is that Cable X thing? Is there any other way to go around that or did you install the Autometer Electric gauges?
but i talked with david and he said its dead on accurate so ill get one eventually but its been so long i know my speed by rpms and gear.
essential tools for a 6 speed conversion
tinner snips, dremmel, lots of cut off disc's and bits and enlarging holes, impact gun for flexplate removal, clutch alignment tool, and tranny jack
Thread Starter
Supreme Member
iTrader: (2)
Joined: Jan 2005
Posts: 3,058
Likes: 0
From: 707
Car: '92 Z03
Engine: LSX
Transmission: M12
I can do without a lot of gauges in my car evidently as my speedo gear broke on my T5 and I was doing the exact same thing, just going by my tach.
Plus my gas gauge has never worked. But I'll save that for when I get a new sending unit and 255lph pump and my rear springs so I can do it all in 1 shot.
Plus my gas gauge has never worked. But I'll save that for when I get a new sending unit and 255lph pump and my rear springs so I can do it all in 1 shot.
Banned
Joined: Jun 2003
Posts: 1,377
Likes: 0
From: Orangevale, CA
Car: 07 Silverado
Engine: 5.3L V8, flexfuel E85
Transmission: 4spd. Auto
Axle/Gears: 3.73 locking diff.
My speedo is also not accurate right now, I also go by my tach. My speedo issue is not only the cable is bad but my speedo gear is the wrong one. I have heard they are accurate when they are working right and in good shape. Would rather have the Autometer electric ones but they are a lot of $. Nice pics, looks like things are coming along. Good idea on doing the sending unit, fuel pump, etc. all at once. I am putting in a new gas tank and fuel pump, etc. all at once some time this summer.
Last edited by wills83z28cfi; Jun 7, 2005 at 03:39 AM.
Thread Starter
Supreme Member
iTrader: (2)
Joined: Jan 2005
Posts: 3,058
Likes: 0
From: 707
Car: '92 Z03
Engine: LSX
Transmission: M12
Thanks Will !!!
It's sitting for a bit because a fellow thirdgenner in need is borrowing my engine crane.
I need to get 30# injectors and a T56 trans still so... I'm not really in a big rush.
I have until July 16th anyways
It's sitting for a bit because a fellow thirdgenner in need is borrowing my engine crane.
I need to get 30# injectors and a T56 trans still so... I'm not really in a big rush.
I have until July 16th anyways
Thread
Thread Starter
Forum
Replies
Last Post
RedLeader289
Tech / General Engine
10
May 28, 2019 01:47 PM
bigjay89gta
Engine/Drivetrain/Suspension Parts for Sale
12
Oct 15, 2015 08:04 AM
efiguy
Engine/Drivetrain/Suspension Parts for Sale
0
Sep 27, 2015 01:30 PM






