My 2.5L Vcg Replacement
Posted 01 January 2011 - 04:21 PM
The front VCG swap was as simple as removing the spark plug caps and valve cover bolts. Remember to clean the cover where the old gasket was. There will be pieces of gasket stuck to the cover and the motor. I found the best way to remove the old gasket was a small flat head screw drver.
Id recommend putting the bolts in order so that you dont put the short ones in where the long ones go, and vise versa.
Old gasket hard and brittle
Be careful not to over tighten the bolts when putting the cover back on.
Posted 01 January 2011 - 04:26 PM
Start with removing the spark plug caps. I labelled them to keep them in order. Also, unplug everything that looks light it is attached to the intake manifold. I used a permenant marker and wrote letters on both sides of the plugs so that I could match them back up later.
This part of the intake will also need to be removed from the IM. There are two nuts and two bolts attaching it.
Unplug all the vacuum lines and fuel lines. Be careful detaching this fuel line because there are two small washers that can easily be lost if they fall down into the motor compartment.
Posted 01 January 2011 - 04:36 PM
Posted 01 January 2011 - 04:46 PM
There were two plugs between the IM and frewall on the passenger side that I couldnt see until I tried to remove the manifold. Here they are, and here is what you should NOT do. I set the manifold down and something broke the vacuum hose underneith it.
Here are the vacuum canisters and the broken canister/hose:
Rather than buying new ones, I made some new canisters out of metal fuel filters. I mounted them outside the manifold and they work great.
When the manifold is off, remove thevalve cover bolts and swap the gasket just like you did with the front gasket. CAREFULLY put the manifold back into place and plug everything back in. It took me about all day to do both gaskets, but I also took pictures and had to fabricate the canisters. If you dont break anything, you can probably do both gaskets in 3 hours if you take your time.
Again, I recommend you label everything so all bolts and nuts are accounted for when its time to put it back together.
I hope this will be some help to someone.
Posted 01 January 2011 - 09:18 PM
I've also found that I periodically need to retighten these bolts, as the gaskets squish over time, and the bolts work themselves loose.
Edited by snailman153624, 22 June 2011 - 10:55 PM.
The torque spec I originally stated was incorrect. The post has been updated to reflect the correct value.
Posted 02 January 2011 - 01:33 AM
Posted 02 January 2011 - 04:42 PM
Posted 03 January 2011 - 09:24 PM
and ya, you need to tighten the VC bolt to the right specs. i did my front a while back and broke 2 bolts cuz i over tightened them. so i had to go to lowe's and get replacement ones, then i decided to replace all of them. the new bolt can handle the high torque and i didn't need to re-tighten them after the gasket gets softer. i think they fit 6mm holes (10mm head) and were 1.5" long. i didn't replace the longest ones cuz they didn't break. but now good thing i got myself a torque wrench. they will come in handy when i need to do other jobs.
Posted 03 January 2011 - 10:54 PM
Posted 03 January 2011 - 11:14 PM
Posted 13 January 2011 - 09:32 PM
Posted 05 February 2011 - 04:53 PM
Posted 05 February 2011 - 08:33 PM
Hi I'm a newbie to this site. Great info, especially for the novice. Was just preparing to think about considering replacing my vcg's in a 2002 626 2.5L. Thanks for taking the time to post this and take pictures. A couple of questions. Did you drain the coolant before starting? And while you had the IM off did you replace the gaskets and the coolant transfer pipe hose?
I've never touched the coolant transfer pipe hose on any of our cars, and I've owned a lot of these V6 motors...and never had one leak, ever [knocks on wood].
There's no need to drain the coolant; the only coolant hoses you disconnect go to the throttle body, and these are higher up than the rest of the cooling system, so just plug them with a piece of shop towel and you won't lose much if any.
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Posted 07 February 2011 - 05:34 PM
Posted 22 May 2011 - 06:14 PM
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