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Username Post: 350 chev timing        (Topic#351975)
sniffy444 
Poster
Posts: 4

Age: 50
Loc: wilmer, b.c., canada
Reg: 07-11-18
07-11-18 02:30 PM - Post#2739711    

I just put in a new double roller timing chain in a 82 chev 350. I aligned the dots on the timing chain and now the valves keep going 180 degrees out. can someone help?



 
raycow 
Honored Member
Posts: 27567
raycow
Loc: San Francisco, CA
Reg: 11-26-02
07-11-18 03:00 PM - Post#2739718    
    In response to sniffy444

I can't speak for a roller chain, but with a stock chain the marks on the two gears (sprockets?) should point directly toward each other.

Unfortunately, this can still leave the distributor rotor pointing toward the wrong cylinder. If that's your complaint, then either move all the plug wires 4 spaces on the cap or else raise the dist out of engagement with the cam and rotate the shaft a half turn. If you aren't a purist, move the wires, because there is less chance of screwing up the timing this way.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
sniffy444 
Poster
Posts: 4

Age: 50
Loc: wilmer, b.c., canada
Reg: 07-11-18
07-11-18 03:13 PM - Post#2739719    
    In response to raycow

thanks. I have tried moving the wires to match the rotor as well as lifting the dist. and rotating the rotor for tdc but it still ends up 180 degrees out when I try to start.



 
raycow 
Honored Member
Posts: 27567
raycow
Loc: San Francisco, CA
Reg: 11-26-02
07-11-18 03:19 PM - Post#2739721    
    In response to sniffy444

I'm sorry, but I am unable to envision the problem as you are describing it, so I suspect that I am not understanding your complaint correctly.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Keith_Knox 
Moderator and "16th Year" Gold Supporting Member
Posts: 5886
Keith_Knox
Age: 76
Loc: Napa, Ca USA
Reg: 04-02-00
07-11-18 04:43 PM - Post#2739729    
    In response to sniffy444

When you say the valves are 180 out, that indicates to me the exhaust is opening when the intake should be opening. That would have to be the gears lined up incorrectly. If the distributor is 180 our the fix would be like ray described.
Installing timing set from Summit.
https://www.youtube.com/watch?v=DOdnWggBCUw

1948 Chevy Fleetmaster Coupe Purchased 6/2010. Stock with rebuilt 52 216 installed May 1966.
1946 Chevy 1/2 ton pickup, stock. Purchased 11/18/17.
1962 Ranchero Purchased 4/2017 221 V8 Automatic.
2013 F150 Crew Cab


 
gchemist 
Senior Chevytalk Moderator
Posts: 24362
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
07-12-18 04:04 PM - Post#2739791    
    In response to Keith_Knox

Welcome to the site. Anything special about the chain? Some have advanced timing added on them. Were there more than one dot marks? Did the cam gear fit only one way?
Here’s a double roller install: https://youtu.be/C1OrEyzRWck



'95 Jimmy SLT (Bought @131,814)
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
Liberty Valance 
Poster
Posts: 60
Liberty Valance
Loc: Euless,Texas
Reg: 07-21-14
07-12-18 04:25 PM - Post#2739794    
    In response to gchemist

Welcome to the site.

1974 Cheyenne 10 LWB 350/TH350/AC/4 BBL Quadrajet


 
sniffy444 
Poster
Posts: 4

Age: 50
Loc: wilmer, b.c., canada
Reg: 07-11-18
07-12-18 05:12 PM - Post#2739795    
    In response to gchemist

thanks again for everyone helping. it was a stock double roller timing set.the cam bearing had only one dot and the main had 3, square for advance and triangle for retard. I aligned the two with the dots.when I try to start it turns over slowly but does not fire.i get #1 piston to TDC and check the dist. and the rotor is off 180 degrees. I lift dist. and turn rotor to #1 piston and try again. it goes back to 180 degrees out. have no idea why.



 
454cid 
Valued Contributor
Posts: 2849
454cid
Age: 45
Loc: West Michigan
Reg: 02-18-12
07-12-18 11:41 PM - Post#2739818    
    In response to sniffy444

  • sniffy444 Said:
...I lift dist. and turn rotor to #1 piston and try again. it goes back to 180 degrees out. have no idea why.



What do you mean by "try again"?


99 K3500 RCLB


 
sniffy444 
Poster
Posts: 4

Age: 50
Loc: wilmer, b.c., canada
Reg: 07-11-18
07-13-18 07:51 AM - Post#2739840    
    In response to 454cid

try to start again but same slow turning over. check dist. and rotor 180 degrees out again. I did move plug wires on dist. but had same result.



 
IgnitionMan 
Valued Contributor
Posts: 3361

Reg: 04-15-05
07-13-18 08:18 AM - Post#2739842    
    In response to sniffy444

When you TDC, is there compression in cylinder 1, or is it on both valves open overlap TDC?

Also, pull the cal off, grab the rotor and try to turn it, it should only move a short distance, then spring back. IF it goes farther, lull djstributor, check for sheared gear Lin, or possible scroll under rotor loose from the main shaft.

My thought is, you are on overlap TDC, not compression TDC.

Dot to dot, 12 to 6 on the timing chain is TDC overlap, not number 1 compression firing. 12 to 12 is TDC on compression on number 1.



 
454cid 
Valued Contributor
Posts: 2849
454cid
Age: 45
Loc: West Michigan
Reg: 02-18-12
07-13-18 08:13 PM - Post#2739921    
    In response to sniffy444

  • sniffy444 Said:
try to start again but same slow turning over. check dist. and rotor 180 degrees out again. I did move plug wires on dist. but had same result.



Pull the plugs and spin the engine with the starter... does it turn over at a normal speed? If not, I would suspect you have an starting system problem... bad starter, bad connections, bad battery, something along those lines.

Any chance your valves are adjusted too tightly?... did you mess with them at all?

How are you determining TDC, when adjusting the distributor, and are you turning the engine two rotations when you're finding it out 180 degrees again?

Do you have any instructions for the new gears and chain? Verify the way you're supposed to have the marks on the gears.

99 K3500 RCLB


Edited by 454cid on 07-13-18 08:18 PM. Reason for edit: No reason given.

 
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