Motor Problems Help!!!
Thread Starter
Intermediate
Joined: Nov 2000
Posts: 35
Likes: 0
From: WHITEFIELD N.H.
Motor Problems Help!!!
Guys,
just installed edelbrock performer package on my b-block,heads ,intake,cam and carb.Got it all set to start,no go.I found no compression while cranking,dbl checked valve adjustment,it was good.Removed rockers from that cyl ,with valves closed comp. was fine.I got crane rollers checked the travel over the valve stem, it was good. pulling my hair out help!!!!
just installed edelbrock performer package on my b-block,heads ,intake,cam and carb.Got it all set to start,no go.I found no compression while cranking,dbl checked valve adjustment,it was good.Removed rockers from that cyl ,with valves closed comp. was fine.I got crane rollers checked the travel over the valve stem, it was good. pulling my hair out help!!!!
Drifting
Joined: Sep 1999
Posts: 1,908
Likes: 0
From: Manassas, VA, USA
Re: Motor Problems Help!!! (C-3 454)
I don't want to insult you, but: Did you degree the cam, or at least line up the timing marks when you installed the timing chain? It sounds like you have a valve open while the piston is moving up. If your cam is significantly off, that could happen.
Distributor being off wouldn't affect compression (although it would make it hard to start).
Distributor being off wouldn't affect compression (although it would make it hard to start).
Race Director
Joined: Apr 2002
Posts: 11,485
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From: Far side of the Moon
CI 4-5-6-7-8 Veteran
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-16-'17
Re: Motor Problems Help!!! (C-3 454)
Based on what you said, you had good compression with the rocker arms removed and yet you have no compression with them installed (and thus the valves operating), I would guess that the valves are adjusted incorrectly and one (or both ??) are not closing all the way.
Also, I was alittle confused... was this on just one cylinder or did you do the test on only one cylinder but the problem was on all of them.
Lastly, please don't pull your hair out. You'll end up looking like me. :lol: :lol: :lol:
Also, I was alittle confused... was this on just one cylinder or did you do the test on only one cylinder but the problem was on all of them.
Lastly, please don't pull your hair out. You'll end up looking like me. :lol: :lol: :lol:
Thread Starter
Intermediate
Joined: Nov 2000
Posts: 35
Likes: 0
From: WHITEFIELD N.H.
Re: Motor Problems Help!!! (gb4622)
First off thanks for your replies guys.
As far as lineing the cam and crank up i'm sure i did it right,done it before.Even so the valves should close at some point or hit the piston.I removed right bank and head is fine,valves not bent.Of course you always secound guess youself when problems arise.
thanks
As far as lineing the cam and crank up i'm sure i did it right,done it before.Even so the valves should close at some point or hit the piston.I removed right bank and head is fine,valves not bent.Of course you always secound guess youself when problems arise.
thanks
Drifting
Joined: Sep 1999
Posts: 1,908
Likes: 0
From: Manassas, VA, USA
Re: Motor Problems Help!!! (C-3 454)
Even so the valves should close at some point or hit the piston.
I'm not by far an engine expert, but if you're getting compression with the rockers off, and none with the rockers on, and your rockers are rolling across the valve tips correctly, then as far as I know there's only two things that can cause it: 1. either your valves are not closing due to the valve adjustment, or 2. your valve timing relative to piston movement is off.
I'd suggest you degree your cam - it could be that your timing gear got the lineup mark punched in the wrong place. Stranger things have happened.
Good luck.
