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-   -   Getting the gunk out (https://montecarloforum.com/forum/engine-transmission-performance-adders-12/getting-gunk-out-9763/)

st07trent Jun 12, 2008 05:27 AM

Getting the gunk out
 
I've heard that you can replace a couple of quarts of oil with transmission fluid during an oil change to get the gunk out of the engine.

I have a 99 Z34 with the 3800. It has 112,000 miles on it. Looking down the oil fill, I can see that there is gunk build up inside the engine.

Does anyone have any more suggestions about how to get rid of the sludge buildup inside the engine?



Cowboy6622 Jun 12, 2008 05:47 PM

RE: Getting the gunk out
 
Seafoam is good stuff for it....

Sir Monte Jun 12, 2008 07:26 PM

RE: Getting the gunk out
 
Welcome Trent to the MCF. You can get Seafoam at your local Autozone. Oh Yeh , how bout some pictures, we love pictures.

st07trent Jun 14, 2008 07:18 AM

RE: Getting the gunk out
 
Seafoam. I'll check it out and post some results. I'll also try to get some pictures posted. Thanks.

rysZ34 Jun 15, 2008 08:58 PM

RE: Getting the gunk out
 
Trent, if you have gunk either the oil is bad or yo have an intake leaking. I would vote the intake leaking. I have 145,000 on my '99 Z34 w/the 3800 and changed upper/lower intake gaskets at 142,000. Check to see if you have white/yellow foam or severe condensation on the bottom of your oil fill cap after the car is warm. If you do, you have an intake leak.

RickCoMatic Jun 15, 2008 09:39 PM

RE: Getting the gunk out
 
Wouldn't a leak chew-up enough coolant after awhile to cause you to "Notice' that thehre is coolant disappearing ... or, ... is the leak not at all that severe?

rysZ34 Jun 17, 2008 08:12 PM

RE: Getting the gunk out
 
Well it wouldn't chew it up as much at the beginning. I didn't even know I had lost any coolant until I saw it seeping from my intake. That is a good point though. I would bet that he has a seeping or leaking intake though.

st07trent Jun 18, 2008 12:28 AM

RE: Getting the gunk out
 
can't post

RickCoMatic Jun 18, 2008 04:31 PM

RE: Getting the gunk out
 
You should stop-in at an AutoZone. They rent tools for free. Get a Cooling System Pressure Checker and see if the system holds pressure of bleeds-by releasing some of the pressure beyond the gaskets and seals.

If you do have that problem of the pressure not holding ... you need to investigate where its going. Some Models had an Intake Gasket that was attacked by the DexCool Stock Coolant and had the Intake Gaskets dissolve and leak.

rysZ34 Jun 18, 2008 05:50 PM

RE: Getting the gunk out
 

ORIGINAL: RickCoMatic

You should stop-in at an AutoZone. They rent tools for free. Get a Cooling System Pressure Checker and see if the system holds pressure of bleeds-by releasing some of the pressure beyond the gaskets and seals.

If you do have that problem of the pressure not holding ... you need to investigate where its going. Some Models had an Intake Gasket that was attacked by the DexCool Stock Coolant and had the Intake Gaskets dissolve and leak.
The '99 Z34's are included in the dexcool settlement. I didn't get any money from it because of the mileage. Yeah DexCool is used in these cars. :( lol


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