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#75
by
libbydiesel
on 24 May, 2017 16:27
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First over piston would be the first size over stock piston, so a 77mm piston because 0.50mm over size is the "first over" size piston.
The oversizes are:
1st=0.25mm
2nd=0.50mm
3rd=1.00mm
I don't know of anywhere that sells 1st oversize. I have heard that the 1st oversize was reserved by VW for factory long blocks that needed some minor correction to the manufacturing/machining and were not typically available to the general public. Because of this, many parts suppliers only show two oversizes and call the 0.5mm oversize the 'first oversize' and the 1.00mm oversize the 'second oversize'.
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#76
by
Tmarkle
on 24 May, 2017 16:50
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First over piston would be the first size over stock piston, so a 77mm piston because 0.50mm over size is the "first over" size piston.
The oversizes are:
1st=0.25mm
2nd=0.50mm
3rd=1.00mm
I don't know of anywhere that sells 1st oversize. I have heard that the 1st oversize was reserved by VW for factory long blocks that needed some minor correction to the manufacturing/machining and were not typically available to the general public. Because of this, many parts suppliers only show two oversizes and call the 0.5mm oversize the 'first oversize' and the 1.00mm oversize the 'second oversize'.
Huh weird. P.S. sorry if this becoming more of a project discussion that turbo swap discussion is annoying people. If a moderator can move this to a project category or something like that.
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#77
by
libbydiesel
on 24 May, 2017 16:57
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There's nothing wrong with this thread being where it is. It's appropriate.
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#78
by
Tmarkle
on 24 May, 2017 21:46
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Got the valves out. Forgot to get pictures. Tomorrow after work I will check the valve guide's
inside diameter.
Best way to remove the valve seals?
Are the valve spring exhaust/intake specific? I kept them separate just in case but I thought I better check.
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#79
by
Tmarkle
on 26 May, 2017 22:08
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So I checked the head for flatness tonight. I did not use a machinist straight edge, but a very expensive 6 foot one. No matter where I placed the straight edge across I couldn't get a 0.003" feeler gauge under it.
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#80
by
ORCoaster
on 27 May, 2017 09:05
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Doesn't sound like you have a warped head then. A quick polish might be all you need. Just to clean it up for the install.
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#81
by
Tmarkle
on 27 May, 2017 09:07
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Doesn't sound like you have a warped head then. A quick polish might be all you need. Just to clean it up for the install.
That's what I was hoping to hear haha, the only thing I'm still stumped on is getting the old valve stem seals out. I should have just left them but I tried getting one out and pulled the spring and some rubber off so now I definitely need to get them out and replace them.
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#82
by
burn_your_money
on 27 May, 2017 09:27
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#83
by
ORCoaster
on 27 May, 2017 18:55
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AS long as you have replacements there is no reason to baby the seals when getting them off.
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#84
by
Tmarkle
on 27 May, 2017 18:57
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AS long as you have replacements there is no reason to baby the seals when getting them off.
I have new ones. No problem there. Ordered a tool kit with a removal tool like above and a set of install tools.
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#85
by
Tmarkle
on 29 May, 2017 17:33
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So I dropped one of the cam followers on the ground... grrrrrrrr! Will I need to replace it or should it be ok? And will cam follower damage from the belt snap definitely be visible?
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#86
by
ORCoaster
on 29 May, 2017 20:47
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Lifters?
or that round can like thing that goes over the springs and has the spacer on top? The Cam followers. I am not following the wording you are using here.
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#87
by
Tmarkle
on 29 May, 2017 20:49
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Lifters? or that round can like thing that goes over the springs and has the spacer on top? The Cam followers. I am not following the wording you are using here.
Oops sorry I'm used to pushrod engines. Yes I meant cam followers.
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#88
by
ORCoaster
on 29 May, 2017 20:57
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As long as you clean it up real good and get the grit off of it you should be fine. I have one in my engine that actually has a bit of the lip that is on top of it that holds the shim in place. The cam lobes don't get near it so it is not a problem. I have replacements now but I really don't want to pull the cam just to replace that one piece. It is working so why mess with it?
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#89
by
Tmarkle
on 29 May, 2017 21:00
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As long as you clean it up real good and get the grit off of it you should be fine. I have one in my engine that actually has a bit of the lip that is on top of it that holds the shim in place. The cam lobes don't get near it so it is not a problem. I have replacements now but I really don't want to pull the cam just to replace that one piece. It is working so why mess with it?
By the way this is a hydro head so no shims. I'm not super familiar with the hydro system so I wasn't sure if there was a mechanism inside that could have been damaged by the fall or the belt failure.
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