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Model specific boards => Golf mk2 => Topic started by: Daston on 26 July 2009, 10:41

Title: Setting up timing on 1.8 8v
Post by: Daston on 26 July 2009, 10:41

Hi guys,

My engine is now back together however my timing seems out, turned the engine over by hand and I can feel the pistons hitting the valves. I have found the TDC mark on the cam pulley and can line that up fine, however how do I know when the Crank pulley and oil pump are at TDC?

Title: Re: Setting up timing on 1.8 8v
Post by: Jay on 26 July 2009, 12:23

Check in the maintenance section Up ^ there :afro: full guide by RubJonny :wink:

Title: Re: Setting up timing on 1.8 8v
Post by: fused on 26 July 2009, 13:55

the 8v don't contact the piston unless you have a high lift cam.

http://www.golfgtiforum.co.uk/index.php?topic=33253.0

follow that to the letter! and you should be ok.  :smug:

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 26 July 2009, 15:56

Cheers guys!

So is the 8v a non interface engine then?

Title: Re: Setting up timing on 1.8 8v
Post by: fishnchipsx2 on 26 July 2009, 19:17

Yes, the standard 8vs are non-interference, although that doesn't mean you won't do damage by snapping a cambelt at 6000rpm!

What you believe to be pistons hitting the valves, is probably just the resistance felt when cranking the engine over by hand due to compression.  :smiley:

Title: Re: Setting up timing on 1.8 8v
Post by: Ben Lessani on 26 July 2009, 21:38

Quote from: fishnchipsx2 on 26 July 2009, 19:17

What you believe to be pistons hitting the valves, is probably just the resistance felt when cranking the engine over by hand due to compression.  :smiley:

Taking the plugs out when turning should confirm that ^^

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 26 July 2009, 22:37

Quote from: Ben Lessani on 26 July 2009, 21:38

Quote from: fishnchipsx2 on 26 July 2009, 19:17

What you believe to be pistons hitting the valves, is probably just the resistance felt when cranking the engine over by hand due to compression.  :smiley:

Taking the plugs out when turning should confirm that ^^

Ahh that makes sense!

Well when the weather decides to stop pi55in it down I shall go and have a look.

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 27 July 2009, 21:52

Cheers guys worked a treat! Painted dots onto the crank and oil pump pulleys so its eaiser to line up next time. Am I right in thinking the cylinder to the right is number 1? It's just that I lined the cam saft up and the cylinder to the far right has both valves closed. I always assumed the one on the far left was number 1.

Title: Re: Setting up timing on 1.8 8v
Post by: Ben Lessani on 27 July 2009, 21:55

Cyl 1 is the closest to the crank pulley.

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 28 July 2009, 12:57

Quote from: Ben Lessani on 27 July 2009, 21:55

Cyl 1 is the closest to the crank pulley.

Hmm Ok thats what I thought. If the Cam pulley is in the TDC position shouldnt the valves on cylinder 1 be closed? I have lined the marker up with the top of the cylinder head yet 1 valve remains open on cylinder 1.

Title: Re: Setting up timing on 1.8 8v
Post by: danny_p on 28 July 2009, 15:04

both lobes are shut for  TDC no1 power stroke.     one lobe is pointing forward one pintinc back      sounds like you have the wrong timeing mark

Title: Re: Setting up timing on 1.8 8v
Post by: rubjonny on 28 July 2009, 16:04

or perhaps the cam sprocket was fitted backwards, as danny says the lobes on #1 should look like this at tdc -> |\   /|

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 28 July 2009, 18:17

Ok good thinking didnt look at the back of the cam just the front.

I tried using the hole punched mark but that was putting them to the closed position I then tried the "T" mark and it got them to the photo below. I take it they need to go over to the left more so both lobes are pointing upwards

(http://img.photobucket.com/albums/v232/godaston/Golf%20Gti/P1010031.jpg)

Title: Re: Setting up timing on 1.8 8v
Post by: rubjonny on 29 July 2009, 10:24

the correct mark is the punch mark on the rear face of the sprocket, and you line this up with the front of the head level with the rocker cover gasket surface :)

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 29 July 2009, 12:44

Quote from: rubjonny on 29 July 2009, 10:24

the correct mark is the punch mark on the rear face of the sprocket, and you line this up with the front of the head level with the rocker cover gasket surface :)

Cool I was looking at the right mark then :) I think the pulley may have been put back on the shaft 180 degrees out.

Title: Re: Setting up timing on 1.8 8v
Post by: rubjonny on 29 July 2009, 15:06

theres a keyway on the cam so you cant put it on 180 out, though if it was missing entirely then it could be. other thing it could be is sprocket on back to front, it has a punch mark on both faces as the same sprocket is used on the intermediate shaft :)

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 29 July 2009, 21:34

sorted! The mark is on the other side of the pulley :) Engine is at TDC and all the plugs n pipes are conected! Bloody battary is flat now so dont know if its going to run I want to try it now!!!!!

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 30 July 2009, 23:31

Well she runs! A little lumpy at idle but seems ok. Large bellow of smoke from the engine bay as all the plug gas cooked off the manifolds gave me a bloody fright lol.

Title: Re: Setting up timing on 1.8 8v
Post by: Daston on 01 August 2009, 13:56

Ok wasnt plus gas lol it seems she's blowing a bit and the dizzy was 2 teeth out so it was running a bit rich.

It idles very rough but levels off at 2k rpm. Done a quick vid do you think this is just ignition timing?

(http://img.photobucket.com/albums/v232/godaston/Golf%20Gti/th_GolfStartup.jpg) (http://smg.photobucket.com/albums/v232/godaston/Golf%20Gti/?action=view&current=GolfStartup.flv)

Thanks