zero clearance

Asked by Feb 08, 2015 at 12:10 PM about the 2002 Pontiac Grand Am SE

Question type: Maintenance & Repair

I have a 2002 pontiac vin#1G2NF12F42C152011 with a broken timing chain, i have it
removed and am able to replace, however my question is, is the4 2.2 echotec a "Zero
clearance" engine? did not want to get too far into it if it has to be scrapped.

1 Answer

41,255

Yes, the ecotec is designed (like many OHC engines) as an interference engine. If your cam timing is far enough off, and you turn the motor over, you bend all of your valves as they kiss the tops of the piston.

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