Every 3 weeks apprx, the water temp gauge shoots up than I'd have to add coolant than it would be fine (about a cup and half worth).

Compression check shows good compression, no blown gasket, etc. Everthing would be fine for 3 weeks than it would start all over again.

Its a daily driver and I boost occasionally on the weekends.

Is coolant loss (evaporation, etc...?) normal for FI setups?

 

Do you notice any puddles under your car after parked?

 

Bubbles at the radiator neck with cap off = BHG.

 

sounds like the beginnings of a blown headgasket

 

Do you have a coolant overflow tank on it? If not that may be the problem. . .

 

I have coolant overflow tank...

I boosted HARD after putting in coolant and levels were fine. Gonna check for bubbles tommorow.

So, uncap the top and look for bubbles while idling..? or rev it a little?

 

Go pick up some ARP headstuds. You'll need 'em soon.

https://honda-tech.com/zerothread?id=967017

 

Check the inside of the cabin on the footwells and floorboards.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hondadrvr215 &raquo;</TD></TR><TR><TD CLASS="quote">I have coolant overflow tank...

I boosted HARD after putting in coolant and levels were fine. Gonna check for bubbles tommorow.

So, uncap the top and look for bubbles while idling..? or rev it a little?</TD></TR></TABLE>

Depends on how blown the gasket is. Just take the cap off (engine cold) and let her run. You'll know pretty quick whether or not the thing is blown. Also look for particles of the head gasket on the radiator cap itself.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redteg_87 &raquo;</TD></TR><TR><TD CLASS="quote">

Depends on how blown the gasket is. Just take the cap off (engine cold) and let her run. You'll know pretty quick whether or not the thing is blown. Also look for particles of the head gasket on the radiator cap itself.</TD></TR></TABLE>

Yeah, I found particles of the HG in my radiator.

 

is your overflow filling up to the top when it overheats? That is a sure sign that you blew the headgasket.

 

Strange thing is the overflow level is CONSTANT even after boosting 14 psi on pump, on the road for 20 minutes, everthing checks out, no leaks, checked for puddles...nothing, but 3 weeks later, gotta add a cup's worth of coolant...

I think it might be just evaporation of sum sort possibly...?

 

ttt