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- Joined
- Jun 16, 2021
- Messages
- 2
- Points
- 1
- City
- Pierce County, WA
- Vehicle Year
- 2000
- Transmission
- Automatic
So I'm taking my sweet time putting new heads on my 4.0 OHV. Figured why not do a little not-so-scientific comparison of the factory (150k miles) rocker arms/push rods to the new Melling replacements I ordered from Rock Auto. Couple things I noted. First, the Chinese Melling rocker arms are about 10% heavier. Lower carbon content/ softer/ less durable? Second, oil passages were a little larger on the Mellings. Third, Melling push rods are significantly more voluminous. Hollow tube vs solid from the factory? Disclaimer: I'm not an expert or an engine builder per say. Just throwing this content on here in case anyone is curious.
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