cololant on engine

bowjangles · 09-13-2013, 08:36 AM

Any ideas out there on how this coolant got on the outside of my 13 B? It was pooled up on the block just above where the intake manifold is attached- in those depressions. Appreciate any insights. Foto attached

rxtasy3 · 09-13-2013, 11:39 AM

there's an "O" ring there between the block and intake. probably leaking.

bowjangles · 09-14-2013, 04:25 AM

Thanks for the info Rxtasy3. I will pull the intake today and take a look. Can I reuse the manifold gasket?

Pete_89T2 · 09-14-2013, 05:47 AM

The OP said this is a 13B, and it's in the 1st gen section so I'm assuming it's a GSL-SE or a 13B transplant from a 2nd gen, is this correct?

If so, the first thing I'd check is the small coolant bypass hose that pipes coolant from the rear housing, through the throttle body/thermo wax and back to the water pump housing. A leak in any of those hoses could result in coolant pooling where the OP stated. The intake manifold O-rings could also be bad, but I don't think that's the case here, since OP said the coolant was on the top side of the mani - coolant won't flow against gravity to pool there.

bowjangles · 09-15-2013, 05:34 AM

Thanks for your input Mr. Pete.
I wish I could find out more about the engine.It was installed in a '80 Triumph TR7 that I recently purchased. The engine is stamped 13 B. Engine number on the block is B 63798.I would love to find out what year is so that I can order some replacement parts. Even called the Mazda dealer- no help there!

Also it has a manual choked Nikki carb on it that also has no Id. numbers either- would like to rebuild that, but alas- don't know model number or year.

The coolant leak was indeed the 2 rubber O-rings that are between the intake man.and the block- they were cracked and deformed- problem solved!

730RWHP12A · 09-21-2013, 08:56 PM

good call Rxtasy3.. this was an old school 13B that had coolant o rings.. they commonly fail, and im assuming that's why Mazda did away with them in the later engines

09-13-2013, 08:36 AM	#1
bowjangles Rotary Fan in Training Join Date: Sep 2013 iTrader: (0) Posts: 62 Rep Power: 12	cololant on engine Any ideas out there on how this coolant got on the outside of my 13 B? It was pooled up on the block just above where the intake manifold is attached- in those depressions. Appreciate any insights. Foto attached

09-13-2013, 11:39 AM	#2
rxtasy3 rotary madness Join Date: Apr 2010 Location: spartanburg, sc iTrader: (0) Posts: 78 Rep Power: 15	there's an "O" ring there between the block and intake. probably leaking.

09-14-2013, 04:25 AM	#3
bowjangles Rotary Fan in Training Join Date: Sep 2013 iTrader: (0) Posts: 62 Rep Power: 12	Thanks for the info Rxtasy3. I will pull the intake today and take a look. Can I reuse the manifold gasket?

09-14-2013, 05:47 AM	#4
Pete_89T2 Lifetime Rotorhead Join Date: Apr 2010 Location: Elkton, MD iTrader: (1) Posts: 874 Rep Power: 15	The OP said this is a 13B, and it's in the 1st gen section so I'm assuming it's a GSL-SE or a 13B transplant from a 2nd gen, is this correct? If so, the first thing I'd check is the small coolant bypass hose that pipes coolant from the rear housing, through the throttle body/thermo wax and back to the water pump housing. A leak in any of those hoses could result in coolant pooling where the OP stated. The intake manifold O-rings could also be bad, but I don't think that's the case here, since OP said the coolant was on the top side of the mani - coolant won't flow against gravity to pool there.

09-15-2013, 05:34 AM	#5
bowjangles Rotary Fan in Training Join Date: Sep 2013 iTrader: (0) Posts: 62 Rep Power: 12	Thanks for your input Mr. Pete. I wish I could find out more about the engine.It was installed in a '80 Triumph TR7 that I recently purchased. The engine is stamped 13 B. Engine number on the block is B 63798.I would love to find out what year is so that I can order some replacement parts. Even called the Mazda dealer- no help there! Also it has a manual choked Nikki carb on it that also has no Id. numbers either- would like to rebuild that, but alas- don't know model number or year. The coolant leak was indeed the 2 rubber O-rings that are between the intake man.and the block- they were cracked and deformed- problem solved!

09-21-2013, 08:56 PM	#6
730RWHP12A Rotary Fanatic Join Date: Mar 2008 Location: chatsworth, california iTrader: (8) Posts: 349 Rep Power: 17	good call Rxtasy3.. this was an old school 13B that had coolant o rings.. they commonly fail, and im assuming that's why Mazda did away with them in the later engines