http://www.denlorstools.com/autoblog/2010/02/gm-3-1-and-3-4-intake-gasket-replacement-tips/ By using the Lisle LIS48500 pushrod removal tool much time is sav…
Auto Repair GM Intake Gasket Replacement with Pushrod Tool
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@Chrisfrisnia: have u performed a cylinder leakage test. This is different
from a compression test. By doing this you will rule out a possible head
gasket problem. Also, how is the intake manifold gasket, is it leaking yet.
Plus, do u have a missfire or MIL on?
lifter damage???
@DenLorsTools Ok, thanks man. I do wish I would had that tool though,
instead of taking the valve assemblies loose and then having to make sure
the pedestals were lined up. I understand letting folks know what they are
getting into prior to diassembly.
oh yea, it would make no sense at all, if you already have the intake off,
y would you do just one gasket?, i mean i cut corners, but theres just some
corners you dont cut
why would you make a video advertising a product without showing how to
actually use it? the scene fades out right as the person begins to put it
to use. i can use my imagination but why should i have to? poor advert.
damn i didnt know about the coolant lawsuit to. i know that junk stuff is
bad. wow thats crazy apparently i shoulda stuck with ford lol. my escort i
sold to get this lumina i had it for 3 yrs no issues at all lol. and this
thing has countless issues. small usual stuff you gotta do but still that
escort i put gas in and went lol.
Sorry if this has already been asked but but I bought a whole gasket kit
and wanted to replace the valve cover grommets but the valve cover bols
seem to be stuck in the cover upon removal. Any ideas? Thanks for the
upload!
@stupidplants 3800 would whoop any 31’s ass they put the 3.8s in bigger gm
cars because of the torque they have, while those 31’s get to go in the
midsize sedan’s , but all in all these engines have good torque and make
any large car giddie up my friends lumina(3.1) will literally float to
highway speeds compared to my sebring’s of equal bodysize.
please help why do i need to remove the push rods in the first place?? i
have to do my lumina it has been leeking for at leaste 2 yrs now not into
the engine or anything just out the sides of the motor. i can see how to
use it it looks very easy but i dont get why i need it.
Yea, good tool. You can leave the rear valve cover on plus the rest of the
items. Pay attention to the pushrod lengths since they are different in
regards to int. and exh. Mix them up and you will bend a valve on startup!!
ALWAYS PAY ATTENTION!!
The Valve train Push rod on this engine are of different length. DO NOT MIX
PUSH-ROD. If the push rod is place in the wrong cam lifer. The valve will
bend/damage when the engine rotate for starting.
I wish I had this tool when my intake gaskets finally gave out for the
first time on my 98 century with 225,000 original miles. It was a pain in
the ass when I had to remove the two bolts that suport the ignition coils.
Oh well now i know.
they have this tool of course lol watch the video says it saves 2 hrs worth
of work of course they charged you for the time they saved thats how they
make money but if you do one gasket the rule of thumb is always do the
second as well with any gasket head gasj=kets intake etc. you just got
screwed cause the other will go eventualy and they will charge you the same
again even though you paid for the kit onec which the kit comes with all
the gaskets they just got free parts for the next sucker
do you know of any one that makes an alloy intake manifold for the 3.8L.
The closest I have found was the W body store, they have a fiberglass
reinforced intake manifold
no, the push rods have to come out.. like i said, the push rods i kinda
like weaved in out of the intake gasket. you can prob cut the gasket up and
take it off without removing the pushrods, but then going back in you’d
have to take them off
yeah i know.. it wasn’t my car that i had to do though, it was a customers
at my shop.. theres also a class action lawsuit against dexron coolant as
well since that coolant has a tendency to go through electrolysis (due to
poor grounds) making the coolant more accident and killing all the gaskets
I just did these gaskets on my gf’s car, 2000 grand prix. Just a lot of
parts to remove!
@caddop22 Yes, the guides for the pushrods are built into the intake
gaskets. And yes, the pushods are different lengths for intake and exhaust.
I know you’ve already done at least one of these jobs and you are aware of
this, but I mention it for other guys that may be reading this prior to
their 1st job of this type.. I also recommend using a Lisle LIS24610 funnel
to help fill the system with coolant after the job is back together. This
helps to get the air out of the cooling system. DennisB
These motors where plaged with those shitty plastic lower intake gaskets GM
used plus Dex-Cool which make a bad combination. These things come into the
shop all the time for this. Use the improved steel framed lower intake
gasket from Fel-Pro and use new bolts. Torque the bolts to the revised
torque spec (included in the Fel-Pro box with new gasket) and use “Permatex
Right Stuff” for sealer on the front and back and you’ll be fine. Finally
flush that Dex-Cool crap and refill with green.
Another 10 minutes, would have had that v/cover off. Any lifters damaged
reported?
@mysubsbang Can you send me one too please, thank you.
Marc, thanks for adding a comment. I’ve probably done 50-60 of these my
self with no problems. But hey, everyone does things a little differently.
the 3400 in my gma’s ’02 impala has an 8 second 0-60 time. thats a base
model and a big car, the 3800 impala isn’t too much faster than that. don’t
under estimate the 3100/3400 engines.
just picked up on of these last week.. a real time saver & they’re lifetime
warranty.
Song?
so do it this way, then pop off the valve covers and replace the gaskets.
you dont have to adjust anything after putting the rods back in like you
would if you removed it the hard way
@chrisfrisina Did you make sure the Coolant system is completely bleed of
all air? Is the thermostat ok?
yeah working on cars everyday, GMs are one of the most troublesome.. fords
aren’t too bad, but if you want somethign that dont have that many
problems? toyotas the way to go haha
Caution – The pushrods are different lengths. The mount unbolts 15mm I
believe. Tighten the rocker arms up the same way you loosened them. See our
article linked in the video description for more tips. Good Luck.
easy shit job for shit cars.. buy cars from japan and save a ton on failing
parts and poorly engineered cars.. Coming from a auto tech from chevy .
trucks are ok but the cars are crap
The front VC is removed during this job. The rear VC does not have to be
removed to change the intake gaskets (this saves time by not removing some
of the components) You can change the rear VC gasket too, if it’s leaking.
The tool allows removal of the pushrods so you can replace the intake
gaskets (the pusrods go in betwen the holes of the gaskets). The pushrod
bolts are threaded into the aluminum heads. It’s best to avoid working
those threads if possible, they strip easily. DennisB
@TranceScene I ran into the same problem you did on a 3.1L chevy venture
All I know is that thanks to GM and their intake problems I have job
security.
Actually it works great for the front rockers too. Yes, the valve cover is
already off but the tool eliminates the need to loosen and re-torque the
bolts. The aluminum threads in the cylinder head are put under a lot of
stress while working the bolts back and forth (while also being pushed
upward by the spring). Which reminds me, the TIME-SERT 1812CORE is for
repairing those worn aluminum threads for the bolt that holds the rocker.
Just in case someone ends up with a fallen rocker. Good Luck.
I have done many sets of these and in the process of finishing one
tomorrow. I also always replace the valve cover gaskets & thermostat as
well. For the pushrods, I take a deep 1/4 10mm socket and mark a white line
facing the center of the round part of the rocker arm and count turns. Also
I make sure I lay them on my cart in the exact order I took them out. It
takes a little longer, but I never have problems this way.
Very cool, would have been handy on the couple I have done. Like how you
can leave the valve covers, coils, and alternator on… Should sell those
with packs of fuel rail o-rings!
Please, can you please make the music a bit louder? Cause I am sure maybe
one person in my local coffee shop didn’t hear the music when it came on…
You most likely already figured this out; The bolts are designed to be held
in with the gaskets. Good Luck.
haha true that. Did the 3100 on my Corsica. Didn’t have the tool in this
video…haha we had fun :]
@de31168 Agreed. Besides, how good would that look for you as a shop (or
mechanic if you do it on the side) if the car came back a month or two
later for a nice oil leak because the seal was broken on the valve cover?
Now you HAVE to pull the alternator and coils/ICM to pull the cover, and
the customer gets to go without a vehicle again and pay more money to have
what could have been done the first time around. I would use the tool as
opposed to loosening and tightening rockers though…
@DenLorsTools Yes the upper cowl is what I’m reffering to. I was not aware
that Lisle had revised the tool to resolve this issue until I read your
blog last night shortly after. There is some really great info on your
blog. I’ve book marked it into my favorites. Great site. The one I was
using that time was the boss’s tool so I could not modify it. A total of
three rear (firewall side) rocker ams had to be loosened and swung aside
due to this problem.