 Heads to Cylinders, any sealant here? |
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| malcolm2 |
 Jul 19 2020, 03:15 PM
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#1
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Advanced Member  Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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I have read thru books galore, watched Jake's video, etc..... I do not see anywhere that any sealant is used here. Not gonna use the head gaskets in the kit. (IMG:style_emoticons/default/piratenanner.gif)
This is my 2nd type 4 engine and I don't remember what I did 7 years ago, much less last week. So do the heads slide on "DRY"? Thanks, Clark |
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| Krieger |
Jul 19 2020, 04:02 PM
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#2
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Advanced Member Group: Members Posts: 4,711 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None
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No gaskets and dry.
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| malcolm2 |
Jul 19 2020, 04:36 PM
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#3
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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I did find it in Tom Wilson's book. I don't like the way that book jumps from type 1 to type 4. I jump past important stuff. Oh well. Thanks for confirming.
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| Bleyseng |
Jul 19 2020, 06:02 PM
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#4
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Aircooled Baby! Group: Members Posts: 13,034 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Nowdays we lap the cylinders to the head using valve lapping compound. Testing the seal with Prussian Blue to verify that the seal is perfect.
Put a little compound on the cylinder lip to be used and with a back and forth motion, lap the bugger into the head. Clean everything off afterwards and apply a dap of PR on the lip and rotate it to the head to get a reading when you put if off. The PR should be continuous on the head surface. |
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| HAM Inc |
Jul 19 2020, 08:18 PM
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#5
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
Note to anyone using my heads.
Do not lap the jugs into them. We CNC machine our cylinder contact surfaces. They have a near mirror finish and ht's are even within .0001". Lapping will roughen the surfaces and can only negatively impact the ht's. If you have doubts about the flatness of your jugs, tape some 600 grit sandpaper to a pane of glass and spin the jug. For sealant I recommend spraying a nice liberal coat of Permatex Copper Coat on the head's cylinder contact surfaces about 10 minutes before the heads are installed. Don't worry about overspray in the chambers or on the fins. It won't hurt a thing. I do like to mask the spark plug threads. |
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| porschetub |
Jul 19 2020, 11:13 PM
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#6
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Advanced Member Group: Members Posts: 4,699 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(malcolm2 @ Jul 20 2020, 10:36 AM)  I did find it in Tom Wilson's book. I don't like the way that book jumps from type 1 to type 4. I jump past important stuff. Oh well. Thanks for confirming. I use a little Hylamar blue under the barrel base shims as I don't think it can do any harm,its non-setting so is good in this area IMO. If you are doing headgasket delete make sure your heads machined accordingly when flycut is done. This is important stuff with a bus engine,good luck. |
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| malcolm2 |
Jul 20 2020, 09:06 AM
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#7
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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I have the sealant kit from Type4 store, so I put "whatever" they suggested under the barrels and on the shims.
Now I remember the copper spray from 7 years ago. HAM suggested that then. I still have the can, so I will apply that again. THanks to all for chiming in. |
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| malcolm2 |
Jul 23 2020, 06:46 PM
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#8
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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| HAM Inc |
Jul 23 2020, 07:26 PM
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#9
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
Perfect!
That's exactly how you do it. (IMG:style_emoticons/default/beerchug.gif) |
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| iankarr |
Jul 23 2020, 08:06 PM
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#10
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,473 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region
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Noted! Can't wait to get to that step on my bumblebee.
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| Superhawk996 |
Jul 24 2020, 07:08 AM
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#11
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914 Guru Group: Members Posts: 5,824 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(HAM Inc @ Jul 23 2020, 09:26 PM) Thanks Len! Same as Cuddy_K -- can't wait to put my T4 back together with your 2.0L heads. |
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