Tappets

Joined
Apr 2, 2009
Messages
7
Location
Ohio
I have an 07 Honda Ridgeline and a 98 Trans Am. Are the tappets in both of thest engines rollers or flat or what? I want to know so I make sure to use the right oil (ZDDP/nonZDDP).
 
Joined
Oct 28, 2002
Messages
48,004
Location
Everson WA - Pacific NW USA
 Originally Posted By: BertWhitaker
I have an 07 Honda Ridgeline and a 98 Trans Am. Are the tappets in both of thest engines rollers or flat or what? I want to know so I make sure to use the right oil (ZDDP/nonZDDP).
Pablo takes a deep breath. Steps off of soapbox. No lecturing tone. Just asking a standard question or three. On the Ridgeline (they are "flat" cam followers), why would you not follow the owners manual? On the Trans Am - is it modified? How did the logic arrive at this point? I mean I am really curious why you would ask about the Honda.
 
Joined
Oct 18, 2007
Messages
3,756
Location
CA
TA is roller. Even if the Honda isn't roller, it's OHC and uses much less spring pressure than a comparable OHV engine. Any normal oil will work fine. I still use an oil that happens to have high ZDDP even though it's not necessary.
 
Joined
Sep 5, 2006
Messages
19,479
Location
Chicago Area
As Pablo initiated, just because a car has 'flat' tappets is not a deal killer for modern oils. Far from it. Most car still use flat tappets, or buckets. Not a problem at all. High performance cams and high spring pressures present the problem, and that mostly with break in.
 
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