# 1999 Ford Explorer - Interference or not?

**URL:** <https://community.cartalk.com/t/1999-ford-explorer-interference-or-not/177349>\
**Category:** Maintenance/Repairs\
**Tags:** ford\
**Created:** [June 9, 2021, 6:38pm UTC](https://community.cartalk.com/t/1999-ford-explorer-interference-or-not/177349 "2021-06-09T18:38:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![wesley21](https://avatars.discourse-cdn.com/v4/letter/w/c37758/32.png) [@wesley21](https://community.cartalk.com/u/wesley21)\
**Post date:** [June 9, 2021, 6:38pm UTC](https://community.cartalk.com/t/1999-ford-explorer-interference-or-not/177349/1 "2021-06-09T18:38:23Z")

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Is the ford explorer xlt 4.0l sohc v6 a NON-INTERFERENCE engine

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**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\
**Post date:** [June 9, 2021, 8:59pm UTC](https://community.cartalk.com/t/1999-ford-explorer-interference-or-not/177349/2 "2021-06-09T20:59:23Z")

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Unfortunately, it’s not.

The Ford 4.0 SOHC is an interference engine.

The Ford 4.0 OHV is a NON interference engine

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [June 9, 2021, 10:25pm UTC](https://community.cartalk.com/t/1999-ford-explorer-interference-or-not/177349/3 "2021-06-09T22:25:40Z")

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The 4.0 SOHC has three timing chains. If one has let go and you **really** want to keep your Explorer a remanufactured engine is your best bet.