Won't start after H/C install
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
Won't start after H/C install
I tried this in C5 tech,Maybe I'll try here.Did a H/C install,Make a long story short.It tries to run but backfires and pops out the exhaust but does not want to start.Has fuel,spark,and more than normal compression.I dialed in the cam,could I have did something wrong there?. 97 C5
Burning Brakes
Joined: Nov 2001
Posts: 1,189
Likes: 2
From: Austin TX
Well, one likely scenario is the cam timing is off. When you said you "dialed in the cam", are saying you used a degree wheel to check the timing events?
When my son did his first cam install (an LS1) he mistook the dowel hole on the cam gear as the timing mark and lined that up with the timing mark on the crank gear. That actual timing mark out near the edge was kinda faint and would be easy to miss. That put his cam either 90 or 180 degress out (can't remember exactly), and gave some strange noises out the exhaust and in the intake when he tried to start it. Was fortunate not to bend any valves, pulled the timing cover and re-aligned and all was fine.
Just a thought...
Dan
When my son did his first cam install (an LS1) he mistook the dowel hole on the cam gear as the timing mark and lined that up with the timing mark on the crank gear. That actual timing mark out near the edge was kinda faint and would be easy to miss. That put his cam either 90 or 180 degress out (can't remember exactly), and gave some strange noises out the exhaust and in the intake when he tried to start it. Was fortunate not to bend any valves, pulled the timing cover and re-aligned and all was fine.
Just a thought...
Dan
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
I did use a degree wheel.I checked a few things today,Tried to start,The pass.side headers were warm and the drivers side cold,So tomorrow I'll check out some more things.A few guys told me Its impossible to be 180 out because the crank turns twice for every one turn with cam 
Drifting
Joined: Jun 2005
Posts: 1,824
Likes: 1
From: Middleboro Massachusetts
Originally Posted by Red98C5
Don't forget to check the cam sensor at the back of the block. Some guys have nicked it upon installing the new cam and the car will not run.
I would say if everything went according to plan, this could very well be the cause.
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