I have always enjoyed the cooling system design from Honda that employs a coolant bleed bolt at a high point on the back of the engine. You just pour coolant into the radiator until a bubble free stream comes out the bolt and you are done. Why don't more companies/designs use one?
Honda's use of coolant bleed bolts, why only them?
- Thread starter SOHCman
- Start date
- Status
Porsche uses them also.
Originally Posted By: sasilverbullet
Porsche uses them also.
And Dodge, GM, Ford.......
Porsche uses them also.
And Dodge, GM, Ford.......
As well as Nissan.
OVERKILL
$100 Site Donor 2021
And BMW.
Originally Posted By: SOHCman
I have always enjoyed the cooling system design from Honda that employs a coolant bleed bolt at a high point on the back of the engine. You just pour coolant into the radiator until a bubble free stream comes out the bolt and you are done. Why don't more companies/designs use one?
Every Chrysler product that's come through my family since about 1993 has had them. Usually on the upper radiator hose neck, basically a brake bleeder valve.
I have always enjoyed the cooling system design from Honda that employs a coolant bleed bolt at a high point on the back of the engine. You just pour coolant into the radiator until a bubble free stream comes out the bolt and you are done. Why don't more companies/designs use one?
Every Chrysler product that's come through my family since about 1993 has had them. Usually on the upper radiator hose neck, basically a brake bleeder valve.
they're pretty common . my saturn doesn't have any and since they are completely unnecessary i dont mind
Using the coolant drain on the radiator, I never have any bubbles, so I don't know if one exists on my Toyota I4. Maybe its not necessary anymore if its done the way they say to do it.
Originally Posted By: eljefino
I don't like them, they get to freeze up with rust or whatever when a car is older and was neglected on someone else's watch.
YES! LOL. My 88 Dodge Aries has this bleeder screw too.....looks like it is unscrewed with a hex/alan key of sorts....and yes read many nightmares of these bolts getting corroded and "stuck"
I had 1 mechanic say they put antiseize on the bleeder bolt before they put it back in.....
I don't like them, they get to freeze up with rust or whatever when a car is older and was neglected on someone else's watch.
YES! LOL. My 88 Dodge Aries has this bleeder screw too.....looks like it is unscrewed with a hex/alan key of sorts....and yes read many nightmares of these bolts getting corroded and "stuck"
I had 1 mechanic say they put antiseize on the bleeder bolt before they put it back in.....
JHZR2
Staff member
My BMWs have them.
OVERKILL
$100 Site Donor 2021
Originally Posted By: VNTS
Another Honda is smarter than everyone else debunked LOL
LOL! I was thinking the same thing!
"My Honda has coils on each of the plugs, why don't other manufacturers do this?"
LMAO!!!
Another Honda is smarter than everyone else debunked LOL
LOL! I was thinking the same thing!
"My Honda has coils on each of the plugs, why don't other manufacturers do this?"
LMAO!!!
I never use that bolt to drain coolant from the engine because I'd rather not make the mistake of not tightening it right and cause it to leak.
Originally Posted By: OVERK1LL
Originally Posted By: VNTS
Another Honda is smarter than everyone else debunked LOL
LOL! I was thinking the same thing!
"My Honda has coils on each of the plugs, why don't other manufacturers do this?"
LMAO!!!
My honda has bucket seats and a little switch on the rear doors so the kids don't get out! It's ossim!
Originally Posted By: VNTS
Another Honda is smarter than everyone else debunked LOL
LOL! I was thinking the same thing!
"My Honda has coils on each of the plugs, why don't other manufacturers do this?"
LMAO!!!
My honda has bucket seats and a little switch on the rear doors so the kids don't get out! It's ossim!
Hold on now, I never said it was Honda=superior thing, it just makes coolant changes a breeze.
They do have their issues like some have said, actually I over-tightened the one on my accord about 150K ago and had to order a new housing for the bolt because the aluminum split down the threads. A bleeder will save you hours of burping a system unless you go all ham fisted and break one like me.
I will have to look closely next time I'm at the salvage yard, I didn't realize so many cars had them.
They do have their issues like some have said, actually I over-tightened the one on my accord about 150K ago and had to order a new housing for the bolt because the aluminum split down the threads. A bleeder will save you hours of burping a system unless you go all ham fisted and break one like me.
I will have to look closely next time I'm at the salvage yard, I didn't realize so many cars had them.
Last edited:
My Oldsmobile has one.
Never seen nor used a coolant bleed bolt. My Golf (and every other mk4 VW I've worked on) must be the easiest cars to bleed the cooling system. Refill through the coolant reservoir while pulling a vacuum on its return line via Mityvac. Stop when you've got solid coolant. Run it up to fully warm, top up the reservoir once and that's where the level stays.
- Status
