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How to determine notches regarding head gasket type
by
monst
on 02 Jan, 2014 16:01
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Hi,
I was wondering how to determine.
what Head gasket I have on car.......
referring to notches?
that is what they ask
at the parts store......
and can I do this without removing the head?
Monst
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#1
by
745 turbogreasel
on 02 Jan, 2014 17:09
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You can't because some tool may have previously used the wrong one. Measure piston protrusion.
1 notch - 1.53mm thick to suit piston protrusion of .66mm to .86mm
2 notch - 1.57mm thick to suit piston protrusion of .87mm to .92mm
3 notch - 1.61mm thick to suit piston protrusion of .93mm to 1.02mm
Max 0.005" variation cylinder to cylinder
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#2
by
Wayland
on 02 Jan, 2014 17:29
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Yes, it's very common for mechanics to just install a three notch to save a few minutes measuring.
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#3
by
libbydiesel
on 03 Jan, 2014 22:34
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Make sure to clean all the carbon off the piston crowns before taking a measurement. I've measured before and after cleaning and the measurement changed from 3-notch to 1-notch.
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#4
by
monst
on 04 Jan, 2014 22:35
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So...
I don't think I need to measure protrusion...
I have owned this car for ever....
But, Please...
if you don't mind for future reference....
How do I measure piston protrusion.....
THanks, Monst
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#5
by
TylerDurden
on 04 Jan, 2014 22:50
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Piece of cake... I'd order a Robert Bentley service manual.
Then I'd get a dial indicator and a surface mount:
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#6
by
8v-of-fury!
on 04 Jan, 2014 23:46
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So...
I don't think I need to measure protrusion...
I have owned this car for ever....
You are right. Unless there is reason to suspect it for being incorrect (lazy mechanic, or whatever).. replace it with what is there already.
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#7
by
745 turbogreasel
on 05 Jan, 2014 17:14
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Piece of cake... I'd order a Robert Bentley service manual.
Then I'd get a dial indicator and a surface mount:
but measure inline with the wrist pin.
Unless there is reason to suspect it for being incorrect (lazy mechanic, or whatever).. replace it with what is there already.
Or if the car was consuming significant water, had a timing belt crash, or anything else that might bend a rod.
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#8
by
TylerDurden
on 05 Jan, 2014 19:15
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You are right. Unless there is reason to suspect it for being incorrect (lazy mechanic, or whatever).. replace it with what is there already.
trust no one
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#9
by
745 turbogreasel
on 05 Jan, 2014 22:42
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I have personally seen one wrong from VWOA $6500 replacement engine. According to the owner, it runs better than ever with the new correct gasket, but I put new nozzles at the same time.
We got every receipt from new, so we can be pretty sure it was them.
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#10
by
monst
on 06 Jan, 2014 22:48
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Interesting...
So what do the (does the)
equipment cost and what is needed...
Just to know.......
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#11
by
745 turbogreasel
on 07 Jan, 2014 02:26
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A feeler gauge, a straight edge, a discerning eye, and 300 scrubbie pads, gotta be clean.
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#12
by
vanbcguy
on 07 Jan, 2014 12:36
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Yup, measure, measure, measure again, measure a 4th time...
The best practice is to measure both sides of each piston and then find the average of the entire set of measurements. There shouldn't be any "outliers" with drastically different results, if there are then that is an indication of a more serious engine problem such as bent rods.
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#13
by
monst
on 07 Jan, 2014 22:39
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The Gasket?
Does it only go on one way
or is it symmetrical that it
could flip and go on left to right
or right to left.......
The reason I mention this is because
mine(the notches) sit to the left of the center port
where as in the picture(jeremies) sits to the left
Any takers on this question?
?
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#14
by
theman53
on 07 Jan, 2014 23:18
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It only goes on one way. the oil port between #3 and #4 is the key part to that. It is in the gasket and the front head bolt goes through it right there. The new gasket will say "top" or "oben" on the side that goes up.