Recent content by palaoan

yes. the cracks were along the valve seats and it was an overheating problem.

It's a 97 4cyl. 2.7 3RZFE 130K miles. When the head came back from the machine shop, I saw the cracks. Coolant leaked in the head, which was the cause of the rough idle when it started. I was just pointing out that if the sensors are replaced, 02 and MAF, and the problem persists, it could be...

No none replied but I found out the problem. I thought I'd share it just in case anyone runs into the same thing. Rough idle was due to coolant in the head, which ended up having stress cracks. I bought a new head for about $500, not including the machine shop cost to resurface, seal, etc...

I've been trying to troubleshoot this problem with my 97 2WD, any help would be great. It idles rough when starts, and after a minute it's smooth and normal. I've done the following but still have not alleviated the problem: changed plugs and wires changed 02 sensor (twice) added fuel...