Gain extra benefits by becoming a Supporting Member Click here find out how!
Classic Performance Products Classic Parts
Ciadella InteriorsAmerican Auto Wire Classic Industries
Chevs of the 40sEcklers AutoMotive
Hellwig Products IncPerformance Rod & CustomDanchuk Catalog
Octane LightingCold-Case Radiators
Impala Bob's Bob's Chevy Trucks Bob's Chevelle Parts Bob's Classic Chevy

Username Post: SBC timing gear and chain install        (Topic#276023)
dc_motruck 
Forum Newbie
Posts: 55

Loc: Rural Missouri
Reg: 02-01-10
02-06-12 10:52 AM - Post#2187815    

I need some expert info to settle a debate. When installing a new timing gear & chain on a small block chevy (a 1988 5.7 TBI) where are the dots on the gears supposed to be when #1 cylinder is at TDC on compression stroke?

What would be out of whack if #1 was TDC on compression and the dots were lined up with each other (crank gear dot at 12 oclock and cam gear dot at 6 oclock) ?



 




aghaga 
"4th Year" Silver Supporting Member
Posts: 2033
aghaga
Age: 62
Loc: Altavista, Va.
Reg: 07-05-08
02-06-12 11:21 AM - Post#2187819    
    In response to dc_motruck

#1 on comression will be with both the crank dot and the cam dot @ 12 o-clock. With the crank dot @ 6 o-clock cyls. 4&7 will be on TDC.



 
62chevy427 
"10th Year" Silver Supporting Member
Posts: 2013
62chevy427
Loc: laurens sc
Reg: 04-13-06
02-06-12 11:24 AM - Post#2187820    
    In response to dc_motruck

the dots should be - crankshaft at 12 oclock and camshaft at 6 oclock. when installing distributor with this set up,the rotor should be ready to fire on #6. never did like that. it has caused me lots of confusion until i figured it out. now,after installing a timing chain and gears,after turning the engine at least 2 turns to verify a correct installation,i leave it with the crank and the cam at 12 oclock. that way i can install the distributor to fire #1 cylinder. i install it so that the rotor is just past the #1 post on the distributor cap.squirt some gas into the carb and it will crank up right away. then set timing etc.

56 bel air ((since 2002)
62 impala ss (since 1965)
65 el camino (since 1969)
66 nova (since 1987)
67 malibu convertible (since 1981)
72 el camino ss454 (since 1985)
83 gmc 4wd (since 1991)
95 impala (new)
14 camaro (new)


 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 16837
grumpyvette
Age: 68
Loc: FLORIDA USA
Reg: 03-16-01
02-06-12 12:00 PM - Post#2187832    
    In response to 62chevy427



http://forum.grumpysperformance.com/viewtopic.php?...

http://forum.grumpysperformance.com/viewtopic.php?...

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 02-06-12 12:02 PM. Reason for edit: No reason given.

 
dc_motruck 
Forum Newbie
Posts: 55

Loc: Rural Missouri
Reg: 02-01-10
02-06-12 01:37 PM - Post#2187866    
    In response to grumpyvette

Thanks. That's where the confusion was... what cylinder was at compression when the dots were facing each other (12 & 6 oclock).



 
MikeB 
Senior Member
Posts: 9994
MikeB
Loc: Plano, TX
Reg: 08-28-03
02-08-12 11:01 AM - Post#2188535    
    In response to dc_motruck

#6 is at TDC compression when dots are next to each other.



1982 C10 SWB pickup: Unmolested base truck, original paint. Originally had 250 six and 3-on-the-tree
Now has 355 with Vortec heads, RamJet roller cam, LS6 beehive springs, TH350
Retired, but working part-time on 50s-70s cars & trucks.


Edited by MikeB on 02-08-12 11:03 AM. Reason for edit: No reason given.

 




Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

9582 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.364 seconds.   Total Queries: 13   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 06:10 PM
Top