Stiffer Valve Springs?

[Big Jim M]

Cush

In GENERAL engines with timing BELT are non interference.. Also in GENERAL engines with a chain are non-interference.
One of my daughters lost a Toyota belt on the hiway and had no problems after replacing the timing belt..
Big JIm

 

[Rearanger]

i say interference. im pretty sure most modern engines are since you couldnt build the compression to get any power or efficiency out of a non-interference engine

Given the Ranger's anemic performance I doubt it is interference. Lack of interference would prevent valve/piston impingement from valve float and probably allows for higher lift 1.8 rockers.

"In GENERAL engines with timing BELT are non interference.."

Why do you say that? Newer Honda, Nissan, Toyota, etc. all have timing belts and are interference.

 

[cush]

big jim i think you're right. i looked in my book from my engine machining class and it said most american motors are non-interference. i thought it was the other way

 

[Rearanger]

big jim i think you're right. i looked in my book from my engine machining class and it said most american motors are non-interference. i thought it was the other way

A general machining book is not the authority. Check each year/make/model here:
http://www.gates.com/part_locator/index.cfm?location_id=3598&go=Interference

I'd be surprised if modern N.A. vehicles, especially smaller displacement were not interference.

 

[Airmaster]

Alright i have an update!!!

The spring set comes with springs, retainers and locks. And they are matched to the roller rockers.

Here is a pic...