I just noticed this today when changing my oil:



I showed my father and he's never seen that before. He opened the radiator cap and air went inside and the hoses expanded back to normal. Now I'm thinking there is air in the coolant, right?

Happens with both the upper and lower radiator hoses.

Anyone explain why this is happening to my Eg/GSR?

Thanks!

 

get a new theromstat.

 

You have a bad rad cap not the thermostat. As the coolant heats is expands and fills the overflow. Then as the coolant cools it contracts the radiator cap is supposed to allow coolant to be drawn back in from the overflow.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kyle h. &raquo;</TD></TR><TR><TD CLASS="quote">get a new theromstat.</TD></TR></TABLE>

Once the car heats up the hoses are fine though (thermostat opening).

Maybe there is air trapped inside (wild guess) ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TREVER &raquo;</TD></TR><TR><TD CLASS="quote">You have a bad rad cap not the thermostat. As the coolant heats is expands and fills the overflow. Then as the coolant cools it contracts the radiator cap is supposed to allow coolant to be drawn back in from the overflow.</TD></TR></TABLE>

I'm not understanding how the radiator cap is bad. It's job is to cause a seal so air can not enter through the opening, right? It must be sealed tight since the hoses expanded when the cap was removed meaning the cap is keeping a tight seal when in place. Thanks for the help. I'm just not understanding how the cap can be bad.

 

the rad cap is both a one way valve and a pressure relief. Water exits the rad when the relief pressure is met (1.1 bar on most honda's). As the coolant cools its takes up less space, which is why your hose is collaspsing. The radiator cap is supposeed to allow fluid to return when it is needed.

 

100% right. Had the same problem, it was a bad cap.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TREVER &raquo;</TD></TR><TR><TD CLASS="quote">the rad cap is both a one way valve and a pressure relief. Water exits the rad when the relief pressure is met (1.1 bar on most honda's). As the coolant cools its takes up less space, which is why your hose is collaspsing. The radiator cap is supposeed to allow fluid to return when it is needed.</TD></TR></TABLE>

 

Should I go OEM or will the Pep Boy replacemnets be fine? Will any Honda cap work or must it be out of a civic? I may try the junkyard Thanks guys!

 

Spoon! lol

 

They are all pretty much the same, just make sure it is 1.1bar.

 

When was the last time the hoses were re-placed...?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 88_SC_CRX_Si &raquo;</TD></TR><TR><TD CLASS="quote">When was the last time the hoses were re-placed...?</TD></TR></TABLE>

The motor is a 98 with 53k on it. The hoses looked to be in great condition before I installed the motor.