× 1-800-946-2642 Home My Account Social / Forum Articles Contact My Cart
Shop Now
Select Your Car Type Sale Items Clearance Items New Items
 

 #1 TDC and timing marks

 Created by: minican
   Forum Width:     Forum Type: 

 Posted: Mar 3, 2019 03:22PM
Total posts: 4
Last post: Mar 3, 2019
Member since:Oct 11, 2016
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
Thanks very much for your help!  Looks like I will actually get to sleep tonight.  Just the clutch now and it is ready to go back in.  Whoop whoop!

 Posted: Mar 3, 2019 02:14PM
Total posts: 9241
Last post: Aug 17, 2023
Member since:Jun 5, 2000
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
US
You have it correct.  The dot-to-dot sprocket alignment is 180 degrees out from what common sense tells you it should be.  When the dots are aligned your engine should be at #4 TDC on its firing stroke (both its valves closed).

Doug L.
 Posted: Mar 3, 2019 11:37AM
Total posts: 4
Last post: Mar 3, 2019
Member since:Oct 11, 2016
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
I am just finishing up a rebuild and am wondering if I have gone wrong.  With #1 at TDC, valves look good, distributor is pointing about 2 o'clock as it should but the dots on the crank and cam sprockets are 180 out.  Should the dots align when #1 is firing or when #4 is firing?  The crank timed out at 107 degrees so I suspect all is ok.  Thanks in advance.  Mike