Gs-R rebuild and break in questions
Thread Starter
Joined: Mar 2004
Posts: 28
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From: Central valley, ca, usa
Gs-R rebuild and break in questions
I have recently rebuilt my 97 B18C1 and I am currently in the break-in phase. I reabuilt the motor with the following:
8.5:1 weisco pistons (0.020" over)
Golden Eagle H-beam rods, blockguard
ACL main and rod bearings
Crower dual valve springs and Titainium retainers
Skunk SS valves
Gs-R cams
JG Edelbrock intake manifold
Hondata intake manifold gasket
new timing belt, H20 pump, gaskets and seals
The block was decked and head was shaved (0.0015" off of both, I think) All of the machine work was done by a reputable machine shop. The motor was machined with the idea of going turbo (oh, by the way, I also have a T3/T04 turbo, spearco intercooler, vortech FMU, aeromotive fuel pressure regulator, hks boost controller). Because I am on the break-in phase, I have the stock injectors and OBD-II P72 ecu and I am only pushing 4-5 lbs of boost. On initial start-up, I filled the motor with Valvoline 30W non-detergent oil and let it idle for about 15-20 minutes at about 1500 rpm. After that, I gently revved the motor between idle and 5000 to help the rings seat (this was done at the advisement of a local tuning shop because this is how they breakin in all of their motors). Then, I drained the oil, checked for metal shavings (there were none) and refilled it with 5-30W synethic Mobile 1. I have since been driving it for a day or two and have put about 70 miles on it. I am still having a couple of problems:
First, i am still getting blow-by. The local shop said that they usually dont get this much blow-by this long after the rebuild. I did a compression check and i have 120psi accross the board.
Second, I am getting what sounds like a faint rod knock comming from the bottem end. After the car warms up, the knock goes away. I was very careful when putting in the bearings and cleaned and plastiguaged all of them (they were all within spec) and used a ton of redline assembly lube before the final torque. I was told that the knock could be the piston rattleing around in the cylinder when it is cold. Then, when the engine heats up and the pistons expands, it now fills the cylinder and the rattleing goes away. Could it be that I have already messed up my bearings and need to pull the motor again or is this normal.
Third, my idle is acting funny. It idle normally for a while but then drops down to 200 or 300 rpm and varys between that and 1000 rpm. I have checked for vacuum leaks and cannot find any. my fuel pressure is set to about 45psi.
Any help and or advice would help. If you guys want pics, I'll try and post them.
Modified by civicgsr209 at 7:37 PM 4/14/2005
8.5:1 weisco pistons (0.020" over)
Golden Eagle H-beam rods, blockguard
ACL main and rod bearings
Crower dual valve springs and Titainium retainers
Skunk SS valves
Gs-R cams
JG Edelbrock intake manifold
Hondata intake manifold gasket
new timing belt, H20 pump, gaskets and seals
The block was decked and head was shaved (0.0015" off of both, I think) All of the machine work was done by a reputable machine shop. The motor was machined with the idea of going turbo (oh, by the way, I also have a T3/T04 turbo, spearco intercooler, vortech FMU, aeromotive fuel pressure regulator, hks boost controller). Because I am on the break-in phase, I have the stock injectors and OBD-II P72 ecu and I am only pushing 4-5 lbs of boost. On initial start-up, I filled the motor with Valvoline 30W non-detergent oil and let it idle for about 15-20 minutes at about 1500 rpm. After that, I gently revved the motor between idle and 5000 to help the rings seat (this was done at the advisement of a local tuning shop because this is how they breakin in all of their motors). Then, I drained the oil, checked for metal shavings (there were none) and refilled it with 5-30W synethic Mobile 1. I have since been driving it for a day or two and have put about 70 miles on it. I am still having a couple of problems:
First, i am still getting blow-by. The local shop said that they usually dont get this much blow-by this long after the rebuild. I did a compression check and i have 120psi accross the board.
Second, I am getting what sounds like a faint rod knock comming from the bottem end. After the car warms up, the knock goes away. I was very careful when putting in the bearings and cleaned and plastiguaged all of them (they were all within spec) and used a ton of redline assembly lube before the final torque. I was told that the knock could be the piston rattleing around in the cylinder when it is cold. Then, when the engine heats up and the pistons expands, it now fills the cylinder and the rattleing goes away. Could it be that I have already messed up my bearings and need to pull the motor again or is this normal.
Third, my idle is acting funny. It idle normally for a while but then drops down to 200 or 300 rpm and varys between that and 1000 rpm. I have checked for vacuum leaks and cannot find any. my fuel pressure is set to about 45psi.
Any help and or advice would help. If you guys want pics, I'll try and post them.
Modified by civicgsr209 at 7:37 PM 4/14/2005
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my ls/vtec has 3k miles since the re-build,it taps a little bit until fully warmed up,then its quiet.
also,i did not hit boost on the new engine for 1k miles,then i switched to synthetic.
im running 11 ilbs of boost and i have my FPR set to 40psi even.
also,i did not hit boost on the new engine for 1k miles,then i switched to synthetic.
im running 11 ilbs of boost and i have my FPR set to 40psi even.
I'm a Jackass
Joined: Jun 2004
Posts: 494
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From: some where in, CLMT, USA
Re: (jsnm)
hey you should be good to go if teh compression is good. the knocking your hearing is probley your pistons slaping around just let it run for a few mins if it hassent bin started up in a while. the blow-by could be from when your pistons are cold and there letting oil past sence there not expanded fully and the ring are not as tight. well I only built one motor for my and it sounds like it runs the same as yours.
Thread Starter
Joined: Mar 2004
Posts: 28
Likes: 0
From: Central valley, ca, usa
Re: (DumpeDc2)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DumpeDc2 »</TD></TR><TR><TD CLASS="quote"> hey you should be good to go if teh compression is good. the knocking your hearing is probley your pistons slaping around just let it run for a few mins if it hassent bin started up in a while. the blow-by could be from when your pistons are cold and there letting oil past sence there not expanded fully and the ring are not as tight. well I only built one motor for my and it sounds like it runs the same as yours. </TD></TR></TABLE>
but i still get blow-by after the engine warms up
Thanks for the comments
but i still get blow-by after the engine warms up
Thanks for the comments
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