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Itsa72
Samba Member
Joined: November 10, 2023
Posts: 8
Location: Des Moines, IA
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 Posted: Wed Mar 13, 2024 4:49 pm Post subject: Crusty valves/head |
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So I am cleaning up and replacing the gaskets on my 1600 DP engine and I found this cylinder valve all crusty like this. The other 3 are just dirty and oily. What could have caused this type of grime. Do I have to dig deeper into the engine. Car has not run for years and I bought it not running. Any advice would be appreciated!
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1972 Super Beetle
2019 Jetta R-Line |
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Zundfolge1432 
Samba Member
Joined: June 13, 2004
Posts: 12468
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| Posted: Wed Mar 13, 2024 7:15 pm Post subject: Re: Crusty valves/head |
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Water caused that. I’d clean it up then remove the valves and clean the exhaust ports looking for cracks. Valves out look at the seats are they rusted? Cracks between seats are ok.
https://www.thesamba.com/vw/forum/viewtopic.php?t=789939 |
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johnnyvw164
Samba Member
Joined: July 27, 2020
Posts: 573
Location: South of Raleigh
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| Posted: Sat Mar 16, 2024 6:24 am Post subject: Re: Crusty valves/head |
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| What does the cylinder look like? |
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Rome
Samba Member
Joined: June 02, 2004
Posts: 9657
Location: Pearl River, NY
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| Posted: Sat Mar 16, 2024 12:18 pm Post subject: Re: Crusty valves/head |
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I agree. First clean the head in solvent. I use a 5-gal utility bucket from Home Depot/Lowe's and put in 2 gallons of diesel fuel or kerosene as the solvent. Let the head sit in the solvent overnight to help soften the grease. After you work the grease off with a stiff parts cleaning brush, use some brass bristle brushes for a drill to work the "calcified" crap off the combustion chamber. A set of these or similar- https://www.amazon.com/Hiqalty-Crimped-4-Inch-Clea...8336141e14
At that point you can inspect the seats and surrounding areas per Zund's response. If there are no cracks, you'll likely need to have all valve seats reground to work through any pitting from the water corrosion on steel. Then replace the exhaust valves. Chase the spark plug holes with a suitable thread tool. |
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Itsa72
Samba Member
Joined: November 10, 2023
Posts: 8
Location: Des Moines, IA
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| Posted: Sun Mar 17, 2024 3:03 pm Post subject: Re: Crusty valves/head |
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The cylinder doesn’t seem to be as crusty as the head. I a, wondering since I am cleaning up the heads if I should also replace the cylinder rings. Not sure if that is part of the problem also.
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 76977
Location: Sneaking up behind you
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| Posted: Sun Mar 17, 2024 3:06 pm Post subject: Re: Crusty valves/head |
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Dished pistons, looks like the engine came from a Bus.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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Itsa72
Samba Member
Joined: November 10, 2023
Posts: 8
Location: Des Moines, IA
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| Posted: Sun Mar 17, 2024 3:20 pm Post subject: Re: Crusty valves/head |
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| Glenn wrote: |
| Dished pistons, looks like the engine came from a Bus. |
Came out of a 72 Super Beetle
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Itsa72
Samba Member
Joined: November 10, 2023
Posts: 8
Location: Des Moines, IA
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| Posted: Sun Mar 17, 2024 3:22 pm Post subject: Re: Crusty valves/head |
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| johnnyvw164 wrote: |
| What does the cylinder look like? |
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