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Coolant Leak Again!


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#1 Nicutlass_Supremacy

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Posted 16 January 2018 - 02:04 PM

Hi guys!

 

I've been searching for a coolant leak for 2 months and I've changed every hose, LIM gasket, O-ring, etc. I'm guessing there's a leak between the engine and transmission, that´s where I can trace the leak. Does anyone know if there's a freeze plug there? I'll try to use some DIY pressure testing and try to isolate the leak. I need some guidance!!!

 

Thanks!



#2 rich_e777

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Posted 16 January 2018 - 05:04 PM

A pressure test would help find where its coming from, I have an intermittent leak around this area as well and will test when the weather warms up some. Ive read where the problem my lie in the lower manifold gasket, an o-ring and a particular hose but I havent dug into the engine enough to see for myself.


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#3 Galaxie500XL

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Posted 16 January 2018 - 07:25 PM

Ultraviolet dye added to the coolant could help track down the source of the leak..

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#4 jmjp5055

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Posted 16 January 2018 - 08:13 PM

Hi guys! I've been searching for a coolant leak for 2 months and I've changed every hose, LIM gasket, O-ring, etc. I'm guessing there's a leak between the engine and transmission, that´s where I can trace the leak. Does anyone know if there's a freeze plug there? I'll try to use some DIY pressure testing and try to isolate the leak. I need some guidance!!! Thanks!

sounds like it is a metal line that runs down and along the passenger side of engine compartment From radiator to trans The fix was to cut the bad section out and reconnect with heater type hose. To actually replace that line you would have to pull the engine. Maybe this helps Sent from my iPhone using Tapatalk

#5 55trucker

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Posted 16 January 2018 - 11:05 PM

I'm guessing there's a leak between the engine and transmission, that´s where I can trace the leak. Does anyone know if there's a freeze plug there? I'll try to use some DIY pressure testing and try to isolate the leak.

 

 

At the rear of the engine........which side do you see the fluid dripping from?.......the forward side (rad) of the trans or the rear of the trans (firewall).

 

Both cyl heads have freeze plugs located in the back end of them, you can't see them for all of the *extras* hiding them.

 

This might be the source of your leak, as far as I can remember the block has no plugs located at the rear.

 

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#6 Nicutlass_Supremacy

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Posted 18 January 2018 - 03:48 PM

At the rear of the engine........which side do you see the fluid dripping from?.......the forward side (rad) of the trans or the rear of the trans (firewall).

 

Both cyl heads have freeze plugs located in the back end of them, you can't see them for all of the *extras* hiding them.

 

This might be the source of your leak, as far as I can remember the block has no plugs located at the rear.

 

IMG_3458.JPG

It's leaking from the forward side, maybe it's that plug hiding behind the engine mount?



#7 55trucker

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Posted 19 January 2018 - 01:06 AM

Well.......to find out you're going to have to pull the exhaust crossover, then you'll be able to see the lower portion of the freeze plug, you'll have to pressurize the coolant system with a hand-held pressurizer, I assume that you don't want an earful of raw :Yikes_anim: :Yikes_anim: exhaust noise while you're doing this.


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#8 Nicutlass_Supremacy

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Posted 23 January 2018 - 01:24 AM

I've found the leak!!! It´s behind the flywheel, on the fron side of the engine. I've bought one of those usb endoscope cameras and took some interesting pics!

Surfing for pics of that back side without a flywheel I've found what it seems to be a lq1 without a plug!! But mine has one and maybe other one on the other side!!

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#9 Nicutlass_Supremacy

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Posted 23 January 2018 - 07:29 PM

Now I need to fix that plug! Which is the easiest way to take that flywheel off? Is there a way to do it without pulling out the entire engine? I don´t want to uninstall the air conditioning and everything else not involved in this!!



#10 Imp558

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Posted 23 January 2018 - 08:32 PM

It might be possible but you're probably going to end up separating the engine and tranny. I don't see running the bolts out of the crankshaft without having the converter out of the way.


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#11 Imp558

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Posted 23 January 2018 - 08:34 PM

A/C and power steering pump just hang off to the side, don't actually take them out. Pulling the engine would make for a great excuse to put a new alternator in given the difficulty of replacing it in the car.


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#12 55trucker

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Posted 23 January 2018 - 08:39 PM

The engine doesn't necessarily need to come out, but.......

 

the trans has to be separated from the engine to get access to the flexplate/flexplate bolts by a long 3/8" breaker bar, I say 3/8" because it is less bulky than a larger 1/2".

 

The paraphernalia from above the trans has to come out, *battery, exhaust crossover*....etc.....the driver's side axle shaft needs to be pulled out from the transaxle, the right side released form the trans, the transaxle support bracket will need to be removed, the engine will need to be supported by an above hoist/engine bay support, one could put a support under the pan but I don't recommend it. Drop the starter, Pull the bolts that hold the trans to the back of the engine & slide the trans back enough to get room to get at the converter flexplate bolts and then the crank to flexplate bolts.

 

One could attempt to move the engine forward but the LQ1 engine mounts are a pain-in-the-ass to get to without lifting the engine up, it's a sort of *six -of-one-or-half-dozen-of-the-other* situation.

 

It's not a fun job at all, and not especially for what you're getting involved with.


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#13 Imp558

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Posted 23 January 2018 - 09:06 PM

Balls


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