Trucks
North West Datsun Enthusiasts Forum : Datsun : Trucks
Topic: 620 timing how to?
Author Message
family200
Groupie
Groupie


Joined: 13 September 2004
Location: United States
Posts: 60
bullet Topic: 620 timing how to?
    Posted: 17 November 2005 at 8:43pm

Sorry if this has been covered before.  I searched for a bit but couldn't find any specific directions.  I thought there was some step by step photos on here, but i couldn't find them. 

Anyways, my neighbor stopped to talk datsun's today and he has a late 70's 620 with the 5-speed in it.  He has the timing chain taken off the truck, and the books that we have aren't giving very good directions.  Most of the books and experience that I have is with the J series stuff.  He just needs to know how to line up the cam and the crank when he puts the chain on.  Probably need to know how to set the dist. as well.  If any one can help I will email the replys to his work address.

Thanks, Alan

1995 200sx
1994 Infinity G20t
1969 521
1967 MG Midget
IP IP Logged
Hainz
Guru
Guru
Avatar

Joined: 03 December 2002
Posts: 3122
bullet Posted: 18 November 2005 at 8:08am








All thes photos are TDC Comp stroke.
Cam on this motor is set to #2 . L20s were set on 2 from fctory or wore timming chain use higher # than was used before.

also buying a New Jap chain will have the brights links to put the links on the dimple marks on the camand crank gear

Fire order 1 3 4 2 counter clock wise

to set cam up set dowel up in the 12o clock position pick which cam dowel setting you want. 1 2 3
IP IP Logged
Bleach
Guru
Guru
Avatar

Joined: 04 December 2002
Location: United States
Posts: 4806
bullet Posted: 18 November 2005 at 12:42pm

ya, so if your friend just yanked the chain off at any given point on the engine stroke then he'll need to be careful. Turn the cam untill the front two lobes are pointing upward and out. \ /
...but at the same time watch those pistons inside. You don't want any valve to piston contact. The front piston needs to be at top. that's TDC on the compression stroke. Then line up the links as shown above.

IP IP Logged
family200
Groupie
Groupie


Joined: 13 September 2004
Location: United States
Posts: 60
bullet Posted: 18 November 2005 at 2:04pm

Thanks for the help guys.  I will pass this on to my neighbor.

Alan

1995 200sx
1994 Infinity G20t
1969 521
1967 MG Midget
IP IP Logged
Hainz
Guru
Guru
Avatar

Joined: 03 December 2002
Posts: 3122
bullet Posted: 21 November 2005 at 4:40pm
dont forget to put oil in the oil pump(primed) when putting it back together so it will suck the oil from ther sump ezer
IP IP Logged