Author Topic: 1.6TD head components  (Read 2861 times)

December 12, 2018, 10:35:20 pm

Huc

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1.6TD head components
« on: December 12, 2018, 10:35:20 pm »
I'm putting back my 1.6TD (MF) head back together and I don't remember the orientation of the components. Does the lower spring seat go on first or the valve seal?   ???

Thank you!



Reply #1December 12, 2018, 10:45:22 pm

Huc

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Re: 1.6TD head components
« Reply #1 on: December 12, 2018, 10:45:22 pm »
This is the gasser 8v orientation as per Bentley
https://imgur.com/0N5e6t9

This is the diesel 8v orientation as per Bentley
https://imgur.com/hqYPKP3

Seems odd that they would be different, which orientation is correct?  :-\

Mine is a late year TD with the hydraulic lifters by the way.
« Last Edit: December 12, 2018, 10:47:15 pm by Huc »

Reply #2December 12, 2018, 11:06:36 pm

ORCoaster

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Re: 1.6TD head components
« Reply #2 on: December 12, 2018, 11:06:36 pm »
Isn't the lower spring seat inside diameter larger than the valve seal?  If not then I would be for putting it on then installing the seal to keep from messing it up.  I think the last kit I got for seals had some hard plastic tips that went on the valve guides to keep from cutting up the inside of the seal. 

The springs should be large enough to go over the seal and not cut into them. 

Been a while since I did the head rebuild thing.  Memory is going as I am cramming too much new info in the confined space all the time.

Reply #3December 12, 2018, 11:18:55 pm

libbydiesel

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Re: 1.6TD head components
« Reply #3 on: December 12, 2018, 11:18:55 pm »
The valve spring seat should go on first. 

Reply #4December 12, 2018, 11:23:28 pm

Huc

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Re: 1.6TD head components
« Reply #4 on: December 12, 2018, 11:23:28 pm »
Isn't the lower spring seat inside diameter larger than the valve seal?  If not then I would be for putting it on then installing the seal to keep from messing it up.  I think the last kit I got for seals had some hard plastic tips that went on the valve guides to keep from cutting up the inside of the seal. 

The springs should be large enough to go over the seal and not cut into them. 

Been a while since I did the head rebuild thing.  Memory is going as I am cramming too much new info in the confined space all the time.

The inside diameter of the lower seat is smaller than the valve seal (it doesn't pass through). The seals I ordered didn't come with any plastic tips to go between the seal and the guides.  >:(

Reply #5December 12, 2018, 11:24:38 pm

Huc

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Re: 1.6TD head components
« Reply #5 on: December 12, 2018, 11:24:38 pm »
The valve spring seat should go on first.

Yeah that's what I thought too, but the manual's diagram got me doubting myself.

Reply #6December 12, 2018, 11:41:09 pm

libbydiesel

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Re: 1.6TD head components
« Reply #6 on: December 12, 2018, 11:41:09 pm »
The plastic caps go over the ends of the valve stems not the guides.  Just be gently in moving the seals over the valve stems and it should be fine. 

Reply #7December 12, 2018, 11:49:55 pm

Huc

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Re: 1.6TD head components
« Reply #7 on: December 12, 2018, 11:49:55 pm »
The plastic caps go over the ends of the valve stems not the guides.  Just be gently in moving the seals over the valve stems and it should be fine.

For the valve stems, I just used a drinking straw to protect the seals from getting torn up by the grooves.

Reply #8December 12, 2018, 11:51:54 pm

Huc

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Re: 1.6TD head components
« Reply #8 on: December 12, 2018, 11:51:54 pm »
Is a special tool required to push the valve seal tightly onto the guide? Using just my finger I can't push it down far enough. I've read people suggesting the use of a deep socket, but I'm worried that the rubber seal will be damaged that way. Is it fine to use a deep socket to press on the seal to seat it fully onto the valve guide?

Reply #9December 13, 2018, 11:59:35 am

ORCoaster

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Reply #10December 13, 2018, 05:49:14 pm

libbydiesel

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Re: 1.6TD head components
« Reply #10 on: December 13, 2018, 05:49:14 pm »
I've always used an appropriately sized socket. 

Reply #11December 13, 2018, 07:33:10 pm

libbydiesel

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Re: 1.6TD head components
« Reply #11 on: December 13, 2018, 07:33:10 pm »
To be clear, I use a socket that is sized so that it is larger than the center rubber seal lip size.  It should go around that and push only on the metal reinforced outer ring. 

Reply #12December 13, 2018, 10:49:47 pm

Huc

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Re: 1.6TD head components
« Reply #12 on: December 13, 2018, 10:49:47 pm »
Awesome, thanks everyone!

Reply #13December 15, 2018, 04:32:56 am

Huc

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Re: 1.6TD head components
« Reply #13 on: December 15, 2018, 04:32:56 am »
I lapped all my valves with some grinding compound a few weeks ago when I first got my head out. After lapping all the valves, I noticed the exhaust valves had excessive play. I replaced all the exhaust valves.

Recently I have finished cleaning the head out and installing all the valves and springs, lifters back in. The thought just occurred to me...should I have lapped the valves again, now that the exhaust valve guides have been replaced?

Would it make a difference to how the valve sits on the seats, now that the exhaust valves no longer have the play it used to have?  Thank you.

Reply #14December 22, 2018, 11:43:01 pm

libbydiesel

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Re: 1.6TD head components
« Reply #14 on: December 22, 2018, 11:43:01 pm »
It can change the sealing of the valve.  Always good to lap them to check.