After cam install trouble code P0300
Thread Starter
Racer
Joined: Jun 2016
Posts: 254
Likes: 67
From: Uppsala Uppland Sweden EC
2024 C6 of the Year Finalist - Modified
After cam install trouble code P0300
Hi
Have massive trouble after cam lifter install, i installed a new cam nothing special so it is within spec of LS6 cam only 550 lift and under 220 duration standard pushrod length.
My problem is valvetrain sounds like ****, engine have trouble holding rpm up almost stop, also no power and shudder misfire when appliyng power, engine before cam install ran totally problem free, now i have code P0300.
I have set rockers 22lbs as per several instructions so i know this is ok twice but still terrible valvetrain noise.
When i installed camshaft i am ” almost ” certain that i got the cam correct against the crankshaft marking but i never did the test of rotating the engine several turns to see if the dots lined up every time stupid me, so my question is this can the engine still run and give these symptoms with the camshaft off by one mark on camgear chain drive ?
Edit: Wrong forum moderator please delete, maybe you C6 guys have the answer also though.
Have massive trouble after cam lifter install, i installed a new cam nothing special so it is within spec of LS6 cam only 550 lift and under 220 duration standard pushrod length.
My problem is valvetrain sounds like ****, engine have trouble holding rpm up almost stop, also no power and shudder misfire when appliyng power, engine before cam install ran totally problem free, now i have code P0300.
I have set rockers 22lbs as per several instructions so i know this is ok twice but still terrible valvetrain noise.
When i installed camshaft i am ” almost ” certain that i got the cam correct against the crankshaft marking but i never did the test of rotating the engine several turns to see if the dots lined up every time stupid me, so my question is this can the engine still run and give these symptoms with the camshaft off by one mark on camgear chain drive ?
Edit: Wrong forum moderator please delete, maybe you C6 guys have the answer also though.
Last edited by MatsA; Apr 29, 2020 at 01:17 AM.
Safety Car
Joined: May 2016
Posts: 4,641
Likes: 1,826
From: Erlanger, Kentucky
Hi
Have massive trouble after cam lifter install, i installed a new cam nothing special so it is within spec of LS6 cam only 550 lift and under 220 duration standard pushrod length.
My problem is valvetrain sounds like ****, engine have trouble holding rpm up almost stop, also no power and shudder misfire when appliyng power, engine before cam install ran totally problem free, now i have code P0300.
I have set rockers 22lbs as per several instructions so i know this is ok twice but still terrible valvetrain noise.
When i installed camshaft i am ” almost ” certain that i got the cam correct against the crankshaft marking but i never did the test of rotating the engine several turns to see if the dots lined up every time stupid me, so my question is this can the engine still run and give these symptoms with the camshaft off by one mark on camgear chain drive ?
Edit: Wrong forum moderator please delete, maybe you C6 guys have the answer also though.
Have massive trouble after cam lifter install, i installed a new cam nothing special so it is within spec of LS6 cam only 550 lift and under 220 duration standard pushrod length.
My problem is valvetrain sounds like ****, engine have trouble holding rpm up almost stop, also no power and shudder misfire when appliyng power, engine before cam install ran totally problem free, now i have code P0300.
I have set rockers 22lbs as per several instructions so i know this is ok twice but still terrible valvetrain noise.
When i installed camshaft i am ” almost ” certain that i got the cam correct against the crankshaft marking but i never did the test of rotating the engine several turns to see if the dots lined up every time stupid me, so my question is this can the engine still run and give these symptoms with the camshaft off by one mark on camgear chain drive ?
Edit: Wrong forum moderator please delete, maybe you C6 guys have the answer also though.
But yes, your engine can definitely still run if the timing gear dots are off by 1 mark or gear tooth.
The P0300 code can also register if the new cam has more duration than the stock cam. This is very common.
You need to verify that the cam is installed correctly (dot to dot), then make sure you have the right pushrod length. If after doing that (and assuming everything else is okay), you will probably need a custom tune to get the car running correctly with the new cam.
Last edited by Spaceme1117; May 6, 2020 at 09:11 AM.
Former Vendor
Joined: Feb 2012
Posts: 26,512
Likes: 351
From: ST. CHARLES IL
Hi
Have massive trouble after cam lifter install, i installed a new cam nothing special so it is within spec of LS6 cam only 550 lift and under 220 duration standard pushrod length.
My problem is valvetrain sounds like ****, engine have trouble holding rpm up almost stop, also no power and shudder misfire when appliyng power, engine before cam install ran totally problem free, now i have code P0300.
I have set rockers 22lbs as per several instructions so i know this is ok twice but still terrible valvetrain noise.
When i installed camshaft i am ” almost ” certain that i got the cam correct against the crankshaft marking but i never did the test of rotating the engine several turns to see if the dots lined up every time stupid me, so my question is this can the engine still run and give these symptoms with the camshaft off by one mark on camgear chain drive ?
Edit: Wrong forum moderator please delete, maybe you C6 guys have the answer also though.
Have massive trouble after cam lifter install, i installed a new cam nothing special so it is within spec of LS6 cam only 550 lift and under 220 duration standard pushrod length.
My problem is valvetrain sounds like ****, engine have trouble holding rpm up almost stop, also no power and shudder misfire when appliyng power, engine before cam install ran totally problem free, now i have code P0300.
I have set rockers 22lbs as per several instructions so i know this is ok twice but still terrible valvetrain noise.
When i installed camshaft i am ” almost ” certain that i got the cam correct against the crankshaft marking but i never did the test of rotating the engine several turns to see if the dots lined up every time stupid me, so my question is this can the engine still run and give these symptoms with the camshaft off by one mark on camgear chain drive ?
Edit: Wrong forum moderator please delete, maybe you C6 guys have the answer also though.
P0300 is a misfire code. If the car is popping and banging loudly your timing is off. So start over. If that's not the case it could just be a plug wire, coil pack or spark plug issue. Start with the easy stuff if you can.
Also, make sure you're getting oil pressure. You didn't take the pump off did you? If so that could explain the valvetrain noise.
Last edited by JUICED1; May 6, 2020 at 09:56 AM.
Thread Starter
Racer
Joined: Jun 2016
Posts: 254
Likes: 67
From: Uppsala Uppland Sweden EC
2024 C6 of the Year Finalist - Modified
Measured with pushrod length checker and came out at 7.3 zero lash, i have Comp cams lifters and they say .02 - 0.08 pre load, so i am getting 7.325 and 7.35 pushrods to begin with and will try them both to see what could be best, am i on the right track ?
The movie file was to big to upload but it sounds bad in valvetrain but no popping and misfire in that sense it feels more at a stumble and absolutely no power, could not push as it sounded bad in valvetrain.
New MSD wires so no problem there, oil pressure no problem new Melling pump.
The movie file was to big to upload but it sounds bad in valvetrain but no popping and misfire in that sense it feels more at a stumble and absolutely no power, could not push as it sounded bad in valvetrain.
New MSD wires so no problem there, oil pressure no problem new Melling pump.
Last edited by MatsA; May 6, 2020 at 12:55 PM.
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Thread Starter
Racer
Joined: Jun 2016
Posts: 254
Likes: 67
From: Uppsala Uppland Sweden EC
2024 C6 of the Year Finalist - Modified
