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Engine Specific Info and Questions => IDI Engine => Topic started by: Powered by Spearco on April 16, 2010, 10:05:14 pm

Title: AAZ valves
Post by: Powered by Spearco on April 16, 2010, 10:05:14 pm

Does anyone know of the valve diameter (7mm or 8mm)  and if they are a tripple groove.?
Also would using titanium retainers and keepers with the HD high rev. springs be benificial?

Title: Re: AAZ valves
Post by: Vincent Waldon on April 16, 2010, 10:10:03 pm

Unfortunately the answer is "both"...depending on the exact model and year.

I have only ever run into the 8mm version, mind you, so if you have to guess go there.

Triple groove, and given the RPM range of the average diesel I personally think the stock springs and keepers don't even break into a sweat. ;-)

Title: Re: AAZ valves
Post by: Powered by Spearco on April 16, 2010, 10:14:58 pm

So they had a split year kind of thing?
But are they both tripple groove'ers  ;D?

Title: Re: AAZ valves
Post by: Vincent Waldon on April 16, 2010, 10:41:21 pm

Far as I can tell...someone may know better.

My ETKA lists two different sets of valves, but they show the same picture which suggests the same # of grooves??

Again, someone else may have more practical knowledge.

Title: Re: AAZ valves
Post by: Rabbit on Roids on April 17, 2010, 08:45:46 am

Quote from: Powered by Spearco on April 16, 2010, 10:14:58 pm

So they had a split year kind of thing?
But are they both tripple groove'ers  ;D?

pretty sure the split for 7mm and 8mm valves is the same as an ABA, because isnt an AAZ pretty much a diesel ABA? if i remember right, the ABA got better valves in 98 or something like that. i remember that the split was the late 90s some time. but thats for the ABA, not completely for sure on the AAZ.