Overheating Issue on RS B18B1
#1
Honda-Tech Member
Thread Starter
Join Date: Feb 2008
Posts: 202
Likes: 0
Received 0 Likes
on
0 Posts
Overheating Issue on RS B18B1
Alright, so I got my new RS (B18B1 Non-Vtec) and I'm going to be rebuilding my GSR engine over the winter, so I need to do a bit of maintenance to the RS engine to make it last all winter...
Right now all I'm worried about is the cooling system. I replaced the upper and lower radiator hoses, replaced the thermostat (but then took it out because it was still overheating), and replaced the radiator cap. So I know there's no hoses collapsing, and I know the thermostat isn't causing the problem...
I've flushed the system at least 5 times now (including a direct flush of the block and head, and a direct flush of the heater core) and its perfectly clear water that comes out every time (no rust or scale comes with the dump-flow), so do you think the water pump might be bad, or is it possible that I have a big block somewhere in the head or block?
Any help is appreciated because it's starting to get cold out and I need to isolate the problem soon... Thanks!
Right now all I'm worried about is the cooling system. I replaced the upper and lower radiator hoses, replaced the thermostat (but then took it out because it was still overheating), and replaced the radiator cap. So I know there's no hoses collapsing, and I know the thermostat isn't causing the problem...
I've flushed the system at least 5 times now (including a direct flush of the block and head, and a direct flush of the heater core) and its perfectly clear water that comes out every time (no rust or scale comes with the dump-flow), so do you think the water pump might be bad, or is it possible that I have a big block somewhere in the head or block?
Any help is appreciated because it's starting to get cold out and I need to isolate the problem soon... Thanks!
#4
Honda-Tech Member
Thread Starter
Join Date: Feb 2008
Posts: 202
Likes: 0
Received 0 Likes
on
0 Posts
Re: Overheating Issue on RS B18B1 (AlphaQup)
It overheats only when the car is IN motion... when it idles, it won't overheat... it starts doing it after driving a while...
Also, the fans do kick on, but only after it's started overheating... otherwise they're only on if I have the A/C on with heat or cool air...
Modified by sh4mr0ck at 7:21 PM 9/24/2008
Also, the fans do kick on, but only after it's started overheating... otherwise they're only on if I have the A/C on with heat or cool air...
Modified by sh4mr0ck at 7:21 PM 9/24/2008
#5
Honda-Tech Member
Join Date: Jun 2008
Location: union city, ca
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
Re: Overheating Issue on RS B18B1 (sh4mr0ck)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sh4mr0ck »</TD></TR><TR><TD CLASS="quote">It overheats only when the car is IN motion... when it idles, it won't overheat... it starts doing it after driving a while...
Also, the fans do kick on, but only after it's started overheating... otherwise they're only on if I have the A/C on with heat or cool air...
Modified by sh4mr0ck at 7:21 PM 9/24/2008</TD></TR></TABLE>
waterpump could be bad. if the water pump is bad it can be coroated and spin enough for it to create bubbles in your water system
Also, the fans do kick on, but only after it's started overheating... otherwise they're only on if I have the A/C on with heat or cool air...
Modified by sh4mr0ck at 7:21 PM 9/24/2008</TD></TR></TABLE>
waterpump could be bad. if the water pump is bad it can be coroated and spin enough for it to create bubbles in your water system
#6
Re: Overheating Issue on RS B18B1 (JuggsxCOmanDO)
yeah if it overheated on idle it would most likely be your thermostat but if you are moving and it is overheating i would suspect the water pump, are their any squeeling or unusual noises
#7
Honda-Tech Member
Thread Starter
Join Date: Feb 2008
Posts: 202
Likes: 0
Received 0 Likes
on
0 Posts
Re: Overheating Issue on RS B18B1 (Steven.)
I haven't heard any squealing or weird noises... also, it sometimes builds up a lot of pressure while driving it, but like I said, never at idle... (if I downshift and run at a higher RPM it also sometimes cools down.)
Could the head or head gasket be cracked and the engine is compressing into the water jackets, or does it sound more like a water pump issue?
Remember, there is no thermostat in it right now, new hoses (top and bottom), and a new cap.
It overheats only while I drive it, and it sometimes cools down if I downshift... Sometimes I see bubbles (maybe an airlock, but I've flushed and bled it many times), and sometimes there isn't bubbles...
Also, whenever I flush it, it's always perfectly clear water that flows from the dump...
My oil doesn't look milky, and my exhaust doesn't seem to have any evap in it...
Could the head or head gasket be cracked and the engine is compressing into the water jackets, or does it sound more like a water pump issue?
Remember, there is no thermostat in it right now, new hoses (top and bottom), and a new cap.
It overheats only while I drive it, and it sometimes cools down if I downshift... Sometimes I see bubbles (maybe an airlock, but I've flushed and bled it many times), and sometimes there isn't bubbles...
Also, whenever I flush it, it's always perfectly clear water that flows from the dump...
My oil doesn't look milky, and my exhaust doesn't seem to have any evap in it...
Trending Topics
#8
Honda-Tech Member
Thread Starter
Join Date: Feb 2008
Posts: 202
Likes: 0
Received 0 Likes
on
0 Posts
Re: Overheating Issue on RS B18B1 (sh4mr0ck)
Update: It's been having trouble starting lately... it sounds like a Scooby when I start it, but once I shut it off and restart it it sounds normal again... It's misfiring, so I'm going to change the plugs, oil, and fuel filter, but could water be getting into the cylinders?
Thread
Thread Starter
Forum
Replies
Last Post
Ej2guy28
Honda Civic / Del Sol (1992 - 2000)
7
11-26-2012 08:29 AM
H22EKHATCH
Tech / Misc
6
01-22-2010 07:59 PM
Squirtle
Forced Induction
7
06-06-2006 02:57 PM