Can a 4.0 timing chain set be used on a 4.2?

rollerized · 05-14-2007, 08:44 PM

Tried a search but found nothing. I have a double roller set for a 4.0 (mopar part #p5249519) and want to put it on my 258 4.2 engine. Do they use the same timing set? Thanks

mp3coupe · 05-14-2007, 08:49 PM

I'm showing different part numbers.

Hit advanceautoparts.com or napa site and search for 90 4.2 and 91 4.0 you'll see different part numbers

**4.7stroker** · 05-14-2007, 08:51 PM

I believe they have a different tooth count.
That said the ratio should stay the same.
When I built my stroker I used the 4.0 timing set on the 4.2 crank, everything went together just fine.
My informed guess is yes it should work.

Dwayne

Ares · 05-14-2007, 11:11 PM

Hmm, i was going to guess that the chains may be different widths, but based off 4.7stroker's comment, I guess not.

Other then that and maybe a difference in tooth count i dont see how else they could be different

rollerized · 05-15-2007, 08:18 PM

Thanks guys, ya I saw that they had different part #'s but figured it might still work.

Chile99 · 05-15-2007, 08:55 PM

I called Cloyes and bought a dual roller set when building my 4.6 stroker , they said the same set fit both 4.2 and 4.0 HO. As 4.7 stroker said "used a 4.2 crank and 4.0 cam and it worked".
John

05-15-2007, 08:55 PM	#6
Chile99 Registered User Join Date: Sep 2004 Location: West Virginia Posts: 237 Profile Gallery Classifieds My Jeeps	I called Cloyes and bought a dual roller set when building my 4.6 stroker , they said the same set fit both 4.2 and 4.0 HO. As 4.7 stroker said "used a 4.2 crank and 4.0 cam and it worked". John __________________ 99TJ 4.0 Auto, Lifted and Locked with a lot of Junk 94 yj 4.6 Stroker, 14Bolt, HP44, 101 wheelbase I brake for Junk Yards