Lets talk LQ4 rod bolts.
Lets talk LQ4 rod bolts. I've decided to rebuild my LQ4 and I didn't realize that the stock bolts are TTY. I already have a new crankshaft with bearings, so resizing the rods is out. From what I understand, that puts the katech and ARP bolts out. I can get LS6 bolts, but will they fit? I have zero intentions of spinning this car over 6500 RPM.
Is there any other option that I am missing?
Is there any other option that I am missing?
From what I understand the different clamping forces are what distorts the rods, not the removal.
There is a GM procedure for retorquing them for reuse I believe.
My roommates trans am had the ls1 rebuilt many years ago and his were re-used. So far there has been no issue with it in the RPM range you are talking about.
My roommates trans am had the ls1 rebuilt many years ago and his were re-used. So far there has been no issue with it in the RPM range you are talking about.
On The Tree
Joined: Nov 2015
Posts: 171
Likes: 5
On The Tree
Joined: Nov 2015
Posts: 171
Likes: 5
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo On The Tree
Joined: Nov 2015
Posts: 171
Likes: 5
Crap didn't know that. From what I read in the service info from GM. It says to replace the rod bolts. The clamping force will change when reusing rod bolts, since they've been stretched before. Someone told me that they just re-torqued the stock bolts to 35ft lbs, and has had no issues.
Crap didn't know that. From what I read in the service info from GM. It says to replace the rod bolts. The clamping force will change when reusing rod bolts, since they've been stretched before. Someone told me that they just re-torqued the stock bolts to 35ft lbs, and has had no issues.
On The Tree
Joined: Nov 2015
Posts: 171
Likes: 5
The factory repair does say to replace the bolts. No disputing that.
On The Tree
Joined: Jun 2012
Posts: 122
Likes: 2
I used ARP's without re-sizing, spun the engine to 6700 daily for 5 years.. will have a video of what the bearings look like here in a week or so.. the engine is out.. alls iv gotta do is make the video, iv only looked at #8 rod and #5 main, i also have ARP main studs.. both bearings looked fine.. except for the dirt contamination, there was no uneven or unusual wear..
On The Tree
Joined: Nov 2015
Posts: 171
Likes: 5
I used ARP's without re-sizing, spun the engine to 6700 daily for 5 years.. will have a video of what the bearings look like here in a week or so.. the engine is out.. alls iv gotta do is make the video, iv only looked at #8 rod and #5 main, i also have ARP main studs.. both bearings looked fine.. except for the dirt contamination, there was no uneven or unusual wear..
On The Tree
Joined: Jun 2012
Posts: 122
Likes: 2
Note: I used the SUM-900015 rod bolt stretch gauge.. the cheapest from summitracing, it was hard to use but worked, also i used the ARP-134-6006 rod bolts ..
Though iv rebuilt a 5.3 and used the stock rod bolts for a second time, got the engine running today, spun it to 6500 a few times and seemed fine.. so far haha..
Though iv rebuilt a 5.3 and used the stock rod bolts for a second time, got the engine running today, spun it to 6500 a few times and seemed fine.. so far haha..
On The Tree
Joined: Nov 2015
Posts: 171
Likes: 5
Note: I used the SUM-900015 rod bolt stretch gauge.. the cheapest from summitracing, it was hard to use but worked, also i used the ARP-134-6006 rod bolts ..
Though iv rebuilt a 5.3 and used the stock rod bolts for a second time, got the engine running today, spun it to 6500 a few times and seemed fine.. so far haha..
Though iv rebuilt a 5.3 and used the stock rod bolts for a second time, got the engine running today, spun it to 6500 a few times and seemed fine.. so far haha..
It's really simple, if you want to use ARP bolts, you must check the rods. If they require a hone, you must do it. Many have required a hone with just reusing the STOCK bolts. Again you must check. You aren't building a house, where close enough is good.
