Dauntless 225 Questions

I am considering purchasing a CJ-5 with the Dauntless 225. It has approximately 90,000 well-maintained miles on the engine and has never had any internal engine work/repairs.

I have heard that the odd-fire engines are hard on timing gears. Since this engine has never been apart, is this something that I should be concerned about changing soon?

Since the heads are original and have never been out of the Jeep, the valve seats have not been hardened. There does not appear to be any problem currently - no smoke, excessive ticking, etc. but is this going to need to be addressed?

 

what Patrick said
I don't think the 225 is harder on them than any other engine.
chains can stretch and the cam gear is plastic; it gets brittle and the teeth break off.

 

if it ain't broke don't fix it....maybe a tune up if due for one.

 

Yes, PM is a good idea in this case. Put in a new timing set and drive it.

 

Is it ok to put un-leaded gas in a stock Duantless 225?

 

I do it....

 

The early unleaded gas was a problem in engines with unhardened seats, primarily in heavy load applications or high performance engines. Modern unleaded gas has additives to address the problems of lubricity that the tetraethyl lead took care of in leaded gas. If it makes you feel better, by all means put in an additive, but really not necessary. As far as the timing chain goes, I'd put in a stock replacement with steel gears that does away with the tensioner. I had an longevity issue with the Edelbrock set I put in my even fire 231 and won't install another one. I put in a quality stock steel replacement set and have had no problems since. I've never had an issue with any other of Edelbrock's products however. Nickmil