 How does it look?, The damage to cylinder 2 more pics added |
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| '73-914kid |
 Nov 29 2017, 04:32 PM
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#21
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Senior Member  Group: Members Posts: 1,473 Joined: 1-November 08 From: Vista, CA Member No.: 9,714 Region Association: Southern California   |
I've built three motors with the melling oil pumps. All make great oil pressure.
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| McMark |
Nov 29 2017, 05:30 PM
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#22
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I've never used a Melling, but it'll definitely pump oil. What I heard was that they tend to leak. But use the sealant I mentioned and you should be fine.
With new heads and the AAPistons 96mm P&C you'll probably end up around 8.25:1 compression out of the box. You can push that up a bit, but it'll take some machine work to do it. Those pistons shouldn't be going that high. Are there shims under the cylinders now? Those might be 96mm pistons designed for a 66mm crank. Doesn't really matter now though. |
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| bbrock |
Nov 29 2017, 05:56 PM
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#23
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains 
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Here's one of several threads that made me decide to take the Melling off my engine and reinstall the stock pump. http://www.914world.com/bbs2/index.php?showtopic=260866 But then there are threads about how the stock pump will ruin your engine.http://www.914world.com/bbs2/index.php?sho...44392&st=20 I even read that quality control on Schadek pumps have gone to hell. https://www.thesamba.com/vw/forum/viewtopic...asc&start=0
(IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/confused24.gif) Probably best to stop reading. (IMG:style_emoticons/default/screwy.gif) But there is some good advice on keeping the Melling from leaking on that first thread. |
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| nditiz1 |
Nov 29 2017, 06:16 PM
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#24
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Senior Member Group: Members Posts: 1,191 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region
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QUOTE(bbrock @ Nov 29 2017, 03:56 PM)  Here's one of several threads that made me decide to take the Melling off my engine and reinstall the stock pump. http://www.914world.com/bbs2/index.php?showtopic=260866 But then there are threads about how the stock pump will ruin your engine.http://www.914world.com/bbs2/index.php?sho...44392&st=20 I even read that quality control on Schadek pumps have gone to hell. https://www.thesamba.com/vw/forum/viewtopic...asc&start=0 (IMG:style_emoticons/default/blink.gif) (IMG:style_emoticons/default/confused24.gif) Probably best to stop reading. (IMG:style_emoticons/default/screwy.gif) But there is some good advice on keeping the Melling from leaking on that first thread. Jake and Mark both advocate not to use the stock pump. I'll keep the melling for now and use the sealant. @ Mark - There is a shim under each cylinder. I need to get my digital portion of my caliper working again to check its thickness. Looks to be about a .010 shim. |
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| yeahmag |
Nov 29 2017, 06:20 PM
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#25
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Advanced Member Group: Members Posts: 2,422 Joined: 18-April 05 From: Pasadena, CA Member No.: 3,946 Region Association: Southern California
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That shim no longer matters. You need to measure the deck height and cc the cylinder heads to get your CR. You can use the following link to figure out your CR after that:
http://cbperformance.com/v/enginecalc.html |
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| barefoot |
Nov 30 2017, 06:14 AM
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#26
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Senior Member Group: Members Posts: 1,280 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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You have not mentioned exhaust valves, hope you're not re-using the other valves.
DO NOT trust 40 year old sodium filled exhaust valves, replace them with SS valves, they're fairly cheap. ( I have not been able to source new sodium filled valves) I had an exhaust valve break just like yours while just removing valves for a general rebuild. |
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| nditiz1 |
Nov 30 2017, 06:47 AM
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#27
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Senior Member Group: Members Posts: 1,191 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region
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QUOTE(barefoot @ Nov 30 2017, 04:14 AM) You have not mentioned exhaust valves, hope you're not re-using the other valves. DO NOT trust 40 year old sodium filled exhaust valves, replace them with SS valves, they're fairly cheap. ( I have not been able to source new sodium filled valves) I had an exhaust valve break just like yours while just removing valves for a general rebuild. Planning on getting all new heads built by Len (HAM) so Manley valves, Crower springs. |
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