cooling system ?s - ZR-1 Net Registry Forums

jonszr1 · 09-21-2008

comming back from the drag strip the low coolant light came on. i opened the rad cap which had pressure and found it to be about 11/2 qts on water filled it . about 80 miles later it did it again . i find no leaks anywhere . could it be the cap or is there somewhere else i need to look

LGAFF · 09-21-2008

Quote:

Originally Posted by jonszr1

comming back from the drag strip the low coolant light came on. i opened the rad cap which had pressure and found it to be about 11/2 qts on water filled it . about 80 miles later it did it again . i find no leaks anywhere . could it be the cap or is there somewhere else i need to look

Are you losing it out the exhaust? Could be head gasket? Gasket Failure on the IH?

LGAFF
92 ZR1
#234

jonszr1 · 09-21-2008

pulled the plugs and seem ok , no leaks any where i can see , i did change pressure caps and it did seem to suck down the overflow a little . wondering if the pressure cap could cause it not to suck out of the overflow >?anyone here of this ?

Locobob · 09-21-2008

You need to use a pressure tester on it with the engine off - much easier to find leaks that way.

jonszr1 · 09-21-2008

thanx bob for your answer . you keep it honest and simple , and i am very greatfull for that . i will see if i can find one . kinda hoped to make vegas though as she was running so well fri.

LGNDLT5 · 09-22-2008

Quote:

Originally Posted by jonszr1

comming back from the drag strip the low coolant light came on. i opened the rad cap which had pressure and found it to be about 11/2 qts on water filled it . about 80 miles later it did it again . i find no leaks anywhere . could it be the cap or is there somewhere else i need to look

The best advice is to put a pressure tester on it. Just to mention this but a very common coolant leak is from the water pump. Very hard to pinpoint but it usually will be evident front center of the engine on the ground of course. Good luck hope it is mnor. John

jonszr1 · 09-22-2008

i got this dye test from napa and it turned out negative . put a new radiator cap on her and phew she is back to normal. didnt know the cap could cause that.

jonszr1 · 09-23-2008

well the dye test isnt all its cracked upto be. well i guess i get to pull a motor and change a head gasket. might have to send them out to be ported and put my spare in .

GOLDCYLON · 09-23-2008

Quote:

Originally Posted by jonszr1

well the dye test isnt all its cracked upto be. well i guess i get to pull a motor and change a head gasket. might have to send them out to be ported and put my spare in .

Spare ??? I thought that was given to the kids for the LT5 Mustang project that debuts in Feb?

cuisinartvette · 09-24-2008

I thought your buddy ported your heads and everything was transferred to the Callaway? Im confused or just not on here often enough .

09-21-2008	#1
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	cooling system ?s comming back from the drag strip the low coolant light came on. i opened the rad cap which had pressure and found it to be about 11/2 qts on water filled it . about 80 miles later it did it again . i find no leaks anywhere . could it be the cap or is there somewhere else i need to look

09-21-2008	#3
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: cooling system ?s pulled the plugs and seem ok , no leaks any where i can see , i did change pressure caps and it did seem to suck down the overflow a little . wondering if the pressure cap could cause it not to suck out of the overflow >?anyone here of this ?

09-21-2008	#4
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,057	Re: cooling system ?s You need to use a pressure tester on it with the engine off - much easier to find leaks that way. __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368

09-21-2008	#5
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: cooling system ?s thanx bob for your answer . you keep it honest and simple , and i am very greatfull for that . i will see if i can find one . kinda hoped to make vegas though as she was running so well fri.

09-22-2008	#7
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: cooling system ?s i got this dye test from napa and it turned out negative . put a new radiator cap on her and phew she is back to normal. didnt know the cap could cause that.

09-23-2008	#8
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	Re: cooling system ?s well the dye test isnt all its cracked upto be. well i guess i get to pull a motor and change a head gasket. might have to send them out to be ported and put my spare in .

09-24-2008	#10
cuisinartvette Join Date: Aug 2005 Location: San Fernando Valley, CA. Posts: 896	Re: cooling system ?s I thought your buddy ported your heads and everything was transferred to the Callaway? Im confused or just not on here often enough . __________________ 1990 ZR1, 142,000 miles-Black on black 4.09's Haibeck chip, 3"exh, K&N, meth inj.