3.1L Cylinder Heads vs 3.4L Cylinder Heads [Archive] - GrandAmGT.com Forum


View Full Version : 3.1L Cylinder Heads vs 3.4L Cylinder Heads

03-04-2009, 06:44 AM
Hey, what is the difference between cylinder heads of VIN M and ones of VIN E aside from the obvious that they go onto 3.1L and 3.4L engines respectively. I know these engines are very similar and the same in some ways and I want to know if the cylinder heads are one of the characteristics that didn't change between the models. I found these:

http://cgi.ebay.com/ebaymotors/GM-V-6-3-1L-3-4L-Reman-Cylinder-Heads-Vin-8-M_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1205Q7c66Q3a2Q7 c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q3a1 Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem15 0329185293QQitemZ150329185293QQptZMotorsQ5fCarQ5fT ruckQ5fPartsQ5fAccessories

The auction ends tonight and I want to buy them very badly so I hope someone answers =X

I have been searching all morning and I have searched a lot last night too and posted on another forum but I never found an answer. Also, I am unsure of what "sensor in the corner" means in the item description. My engine is a 2002 3.4L SE V6 engine and I wanna get these because it is a LOT cheaper than getting resurfacing and valve jobs at all of the places near my home. (Within 30 miles) So any help will be appreciated. I want these things to fit in my car perfectly!!!!

03-06-2009, 09:51 AM
I'm not sure on the valve sizes difference but the bolts and water jackets will line right up. The question is will the lower intake fit in there right. Also the exhaust ports are a different shape. If you want it to fit perfect I would search for some 3.4 heads because you know they will fit right.

03-06-2009, 12:09 PM
2000+ 3100 and 3400 heads are the same. Ask him what year they are off of.

03-07-2009, 03:26 PM
alright, thanks guys. The guy said he has some for my car and will send them for the same price as the ones he listed.