2.35 conversion timing problem
22 August 2012, 08:25 AM
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2.35 conversion timing problem
Hi guys,
I've rebuilt my 2.35 engine due to some troubles with a cracked cylinder head.
Of course I wasn't able to reuse my old heads - so I bought another set of used STI V6 heads incl. camshafts and valvetrain (exactly the same, which were fitted before).
As there came no pulleys with the camshafts I bought I had to use the old ones. Unfortunetely two of them where slightly damaged, so I did changed them for pulleys of std. Turbo 2000 V5 heads.
Naturally I compared them to the old STI pulleys, but I can't find any difference.
I also had to change the crank pulley, as I destroyed it when removing it from the crankshaft.
Again I did use a pulley of my old std. Turbo 2000 V5 engine, which seemed to be exactly the same.
Now I've put on a new cambelt incl. tensioner and tried to spin the engine, but there seems to be no compression.
I've used the std. marks (lines) on the pulleys to assure proper timing as usual and everything seems to be perfect according to these marks.
I really don't know what I've done wrong - maybe someone could help me out.
Thanks,
Rudi
I've rebuilt my 2.35 engine due to some troubles with a cracked cylinder head.
Of course I wasn't able to reuse my old heads - so I bought another set of used STI V6 heads incl. camshafts and valvetrain (exactly the same, which were fitted before).
As there came no pulleys with the camshafts I bought I had to use the old ones. Unfortunetely two of them where slightly damaged, so I did changed them for pulleys of std. Turbo 2000 V5 heads.
Naturally I compared them to the old STI pulleys, but I can't find any difference.
I also had to change the crank pulley, as I destroyed it when removing it from the crankshaft.
Again I did use a pulley of my old std. Turbo 2000 V5 engine, which seemed to be exactly the same.
Now I've put on a new cambelt incl. tensioner and tried to spin the engine, but there seems to be no compression.
I've used the std. marks (lines) on the pulleys to assure proper timing as usual and everything seems to be perfect according to these marks.
I really don't know what I've done wrong - maybe someone could help me out.
Thanks,
Rudi
Last edited by ScoobGT; 22 August 2012 at 08:28 AM.
22 August 2012, 12:44 PM
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Do you mean the bucket tappets?
Sorry for my english - I have to look some words up in dictionary :-)
@ Shmerman:
I used these marks:
http://www.google.at/imgres?q=timing...K6ygNAC&zoom=1
Sorry for my english - I have to look some words up in dictionary :-)
@ Shmerman:
I used these marks:
http://www.google.at/imgres?q=timing...K6ygNAC&zoom=1
22 August 2012, 01:11 PM
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When you say spin up the engine? I assume you mean it is back in the car?
Did you reset the valve clearences? STI 6 heads are solid lifters so not hydraulic.
So your cams are fitted correctly & pulleys?
Did you reset the valve clearences? STI 6 heads are solid lifters so not hydraulic.
So your cams are fitted correctly & pulleys?
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22 August 2012, 04:27 PM
#9
Sorry I should have been more specific.
I was asking if you could post pictures of yours all times up so it could be double checked..........i'm sure its all fine but if, say the single marks on the cam wheels are lined up together then there is your problem.
I was asking if you could post pictures of yours all times up so it could be double checked..........i'm sure its all fine but if, say the single marks on the cam wheels are lined up together then there is your problem.
22 August 2012, 05:22 PM
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Just a check. Have you used the correct mark on the crank puley. Theres s timing mark and also an arrow. People often time up using the arrow. This is incorrect. From memory the arrow points to 2o'clock when your on the correct mark
22 August 2012, 09:11 PM
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You say different heads so you should of checked the valve clearences, who's to say shims got taken out and put in the wrong place? Regardless of that they will be different to what you had before because they are not the same heads, are the valves in the heads ok? Did you check and rebuild those heads?
Your markings off belt to pulleys are correct and your cams are installed correctly so whats going on here! Have you done a compression test?
Your markings off belt to pulleys are correct and your cams are installed correctly so whats going on here! Have you done a compression test?
23 August 2012, 07:06 AM
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There's 2types of crank / trigger pulley , you haven't fitted a newage or viceversa depending on your Ecu trigger settings?
Also as mentioned do a compression check .
Ant
Also as mentioned do a compression check .
Ant
Last edited by A.D.Edmundson; 23 August 2012 at 06:45 PM.
23 August 2012, 10:12 AM
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Take the cam belt off and close the valves, then crank by hand (with plugs in) and see if you can feel compression, if not it's probably the valves not shutting for some reason, as Primero said check you have clearance between the cams and buckets with a feeler gauge, .006"/.008" inlet/exh
23 August 2012, 07:23 PM
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As WMS said take the belt off & try what he advised, I would absolutley take the cam covers off and check the inlet & exhaust clearences.
Do you have a cylinder leakage tester? That way you will see where you are loosing compression e.g Inlet or exhaust.
Let us know what you find wrong, out of interest you had this engine running and then the head cracked? or? Was heat involved here?
Do you have a cylinder leakage tester? That way you will see where you are loosing compression e.g Inlet or exhaust.
Let us know what you find wrong, out of interest you had this engine running and then the head cracked? or? Was heat involved here?
25 August 2012, 11:27 PM
#21
Chances are the valve clearances are wrong if you havent set them on assembly or even checked them prior to refitting the cam covers.
As mentioned above, make sure you are using the correct mark (line) and not the triangle (which is the TDC mark) on the crank pulley,
As mentioned above, make sure you are using the correct mark (line) and not the triangle (which is the TDC mark) on the crank pulley,
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