i think my coolant seals just went.
03-17-08, 07:55 PM
#1
i think my coolant seals just went.
so i get from home work tonight and drive my car into the garage and go inside. i go back out to the car and start it to get some grub and it stuggles to start and when it does it blows a huge white cloud out the back and my heart sank. ths has to be the coolant seals correct???i took the cap off and looked at the coolant and it was bubbleing like crazy and i oulled the dipstick to check for coolant in the oil and sure enough there it was so. i dont know how this happened because it only has 25,000 miles on the reman and never been overheated scense its been in my posession. is it rebuild time? and just the coolant seals can be replaced correct?
03-17-08, 08:00 PM
#2
Original Gangster/Rotary!
iTrader: (213)
Reman build quality has fluctuated over the years, so it's not unheard of for the coolant seals to let go with no rhyme or reason. Because of this, at the shop we recommend tearing down even a fresh reman to spec and clearance everything.
With that amount of mileage on the internals, you could get away with replacing just the soft seals I suppose. If it was my motor I'd probably get it ported, and replace all the hard seals as well.
With that amount of mileage on the internals, you could get away with replacing just the soft seals I suppose. If it was my motor I'd probably get it ported, and replace all the hard seals as well.
03-17-08, 08:30 PM
#3
yeah and i was just a few items away from putting my single on, and this happens. yeah i might have to go another route on this one. so i know there is the inner and outer water jacket seals, but what else is there in the soft seals realted to cooling?
03-17-08, 10:08 PM
#5
I had the same problem. Coolant bubbled at top of filler neck and there was tons and tons of white smoke pouring out the exhaust. Also, my car would overheat and coolant pressure would build up and come out of the vent hole in the overflow tank. Sorry to hear that bro.. i'm in the same boat. 
03-17-08, 10:08 PM
#6
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03-17-08, 10:10 PM
#7
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related to this, I seem to lose a little bit of coolant every time I take the car out, like a measuring cup or less...it has been stable for over a year but I wonder if there is a small leak
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03-18-08, 09:29 AM
#9
Original Gangster/Rotary!
iTrader: (213)
Mark, my FD was doing the same thing. Ended up being my single turbo heater hoses were leaking around the circumference on the hose ends, where the reinforcement strands are. I ended up replacing them with some sturdy dual-ply silicone, zero problems since. Being that you're running BNRs I'm sure your problem isnt exactly the same, but it could be related.
03-19-08, 06:17 AM
#16
It is not typically the coolant seals themselves that fail. The coolant seal retaining walls deteriorate and allow the seal to pop into a coolant channel. This is evident by having coolant in one of your combustion chambers. A quick test for this is to pull the 2 leading plugs and rotate the engine backward by hand. If coolant pours out then you certainly have some sort of inner coolant seal or wall failure.
For the coolant seals to fail without wall erosion, there usually needs to have been a overheating episode extreme enough to warp plates.
In either situation there are other components that need to be replaced besides just the coolant seals.
You are a GM tech so you should have the equipment to do both a pressure leak down test, to see if there are any coolant leaks, as well as a coolant hydrocarbon test to see if there is an exhaust gas present in the coolant system. If coolant is not present in the combustion chambers we always perform a HC test whenever a customer suspects a coolant seal failure.
This can save you a costly rebuild or at least verify that you do need one.
For the coolant seals to fail without wall erosion, there usually needs to have been a overheating episode extreme enough to warp plates.
In either situation there are other components that need to be replaced besides just the coolant seals.
You are a GM tech so you should have the equipment to do both a pressure leak down test, to see if there are any coolant leaks, as well as a coolant hydrocarbon test to see if there is an exhaust gas present in the coolant system. If coolant is not present in the combustion chambers we always perform a HC test whenever a customer suspects a coolant seal failure.
This can save you a costly rebuild or at least verify that you do need one.
03-19-08, 06:56 AM
#20
well its a possibility, mazda remans are kinda up and down on quality, thats why i prefer to rebuild with someone i know thats good with rotary engines.
From my dealings so far, Rotorsports has been really good so i would trust them to rebuild, or atleast do the porting work. The owner there is real good with rotaries it seems, and he really knows his stuff.
From my dealings so far, Rotorsports has been really good so i would trust them to rebuild, or atleast do the porting work. The owner there is real good with rotaries it seems, and he really knows his stuff.
03-19-08, 08:41 AM
#22
Original Gangster/Rotary!
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https://www.rx7club.com/3rd-generation-specific-1993-2002-16/results-not-flushing-your-coolant-686776/
03-23-08, 08:32 PM
#24
ok update i got the motor out today and im waiting for more light so i can finish. tough balanceing homework, work, and working on your car, but the seals just came in from mazda and it was 101.00 for the water seals!!!! ill take some pics tommorrow.