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Author Topic: Valve damage?  (Read 2743 times)

Offline golfmk4owner

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Valve damage?
« on: 22 October 2011, 16:12 »
After failing to turn my engine over properly due to wrong timing, i suspected id damaged a few valves. I've took the head off and thought i'd see something obvious but with the cams off all the valves are closed fine and straight from what i can see. When the head was on the car the cams were really hard to turn by hand, but now im thinking maybe it was the cams that were the problem... could overtightening the caps have been the problem perhaps?
I dont want to struggle getting the valves out if i dont have to, so heres a typical pic of the valves for your opinions:


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2005 GT TDI 140 - Standard as F@k

Offline golfmk4owner

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Re: Valve damage?
« Reply #1 on: 22 October 2011, 20:50 »
Ok i'll be simpler - Do these valves look ok? If so, why might the head be difficult to turn?
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2005 GT TDI 140 - Standard as F@k

Offline T~L~C

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Re: Valve damage?
« Reply #2 on: 22 October 2011, 21:29 »
If they'd hit your pistons at all you'd see little crescent shaped dents on the piston crowns, are there any marks on the pistons ?
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Offline Wayne

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Re: Valve damage?
« Reply #3 on: 22 October 2011, 21:35 »
No chance you mixed the cam caps when refitting  :undecided:
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Offline golfmk4owner

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Re: Valve damage?
« Reply #4 on: 22 October 2011, 22:17 »
Im sure i put the caps back in numbered order. I didnt torque them i admit, and when it came to removing them again, one of the caps was really stuck on hard. I was just expecting to see valve damage but now im thinking theyre fine and the cams were just too stiff?
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2005 GT TDI 140 - Standard as F@k

Offline clipperjay

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Re: Valve damage?
« Reply #5 on: 22 October 2011, 22:46 »
They look fine nothing a bit of honning on them to clean them up!
Sounds like they could be sticking????
 :undecided:
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Offline golfmk4owner

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Re: Valve damage?
« Reply #6 on: 24 October 2011, 12:46 »
Hmm what would cause them to stick mate? Carbon and such is it? would your advice be to get them out and cleaned up?
Also, my haynes says not to grind the valves on a 16valver, why is this?
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2005 GT TDI 140 - Standard as F@k

Offline rob.043

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Re: Valve damage?
« Reply #7 on: 24 October 2011, 16:39 »
I reckon you should strip the valves out now that you have the head off. They may look ok but a slight bend would be enough. Check each slides easily in its guide once you have the springs off.
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Offline golfmk4owner

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Re: Valve damage?
« Reply #8 on: 24 October 2011, 21:01 »
Yes i agree they need to come out, im just ready to order a tool to get em out!
I'll only be using it the once, so dont want to spend mega money, but havnt used one before. Does this tool look suitable for it?

http://www.ebay.co.uk/itm/Clarke-CHT462-OHV-Valve-Spring-Compressor-Tool-/150654846213?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D4%26po%3DLVI%26ps%3D63%26clkid%3D3708805610206216923
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2005 GT TDI 140 - Standard as F@k

Offline DOA

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Re: Valve damage?
« Reply #9 on: 24 October 2011, 22:17 »
Pretty sure you need one that can get to deep valves, that looks more suited to rocker actuated valves rather than cam on bucket style. The one in the link seems pretty good value to me and should have the depth to get in there (I have always end up making special extensions for my cheapy sealey as one size definately doesnt fit all lol).

http://www.ebay.co.uk/itm/9pc-Valve-Spring-Compressor-Set-/220871295655?pt=UK_Hand_Tools_Equipment&hash=item336cf482a7
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