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Old 01-09-2009, 01:31 AM   #1
jimon007
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Default Shall I use K&W Block sealer for Blown Head Gasket??

*********P.S. This was posted on introduction but realised that I should post here. Sorry for double postings**************


Hi!
I live in Wellington, NZ. I have Subaru Legacy TS-R Non-Turbo 1998 and according to mechanic it has blown head gaskets. I have radiator repaired, hose s refitted, themostats checked. What it does is:

Symptom: For the first 20 or 30 mins okay but the temp goes up to Red zone. When I open the bonnet I found that the coolant in the reservoir was boiling (sort of). Then turned off the engine and found there were loss of coolant. It drives okay except getting overheated.

Possible cause: I drove long trip with faulty tyres (they bounce) and found there were no coolant left. So I filled in with coolant (concentration without missing with water) and anti-leak sealant (didn't follow the instruction - should have shaked vigorously but found it later) then it drove well. I found some smoke the other day and didn't check. I operated air con full (it is summer here) and drove longer than usual distance. Suddenly the car stopped in the middle of road. Cooled it down and managed to park. I came back to the car 2 hours later and found the car was driveable (should have checked the coolant). I drove people off and on my way back to home found the temp was so high. I stopped at patrol station and found the steam coming out. I added some water (quite a lot) and cool it down before drove to home (about 10 mins driving). Then I parked the car for 3 weeks and went to garage to repair the radiator. He repaired and told me it should be okay but watch out for possible damage to the head gasket. I drove it for 30 mins and found the overheating problem (losing coolant...and it boiled but no steam etc) so I contacted the mechanic and left the car with him. He checked the themostats and test drove. It was intially okay for 20 mins then overheated. He told me he did the pressure test and it has blown head gaskets and it would cost me approx $2000(US$1100?).

I do not have the money. So I am looking for the option using "Engine Block sealer" (i.e. K&W Block sealer or similar). I found this while I was surfing for the advice. Reading from some of posts here that "2nd hand car dealers use the sealer to their cars. Is it true? Then it might be able to solve my problem . Any advice/suggestion or first hand experience you would like to share with me? I'd really appreciate your help in advance.

I am just new here and feel like a baby. I would really appreciate your TLC
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Old 01-10-2009, 10:33 AM   #2
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

If you got it as hot as you say you did, you probably warped the head as well. Don't use that instant seal stuff. Not only does it seal up leaks, it also does a good job of plugging up your radiator and water pump passages over time.

You'd be better off saving up the money and doing it the right way...
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Old 01-10-2009, 11:20 PM   #3
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

K&W is a good product... follow the directions to a T and you may be surprised. I've had good luck with it several times.

The key is to use it with clean water and drain the system and allow it to sit overnight before you refill the system.
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Old 01-11-2009, 09:52 AM   #4
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

Your wasting your time and money not to mention the damage you
could do to the motor don't drive it till you can afford to fix it properly.
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Old 01-11-2009, 04:17 PM   #5
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

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Originally Posted by 10.5 outlaw View Post
Your wasting your time and money not to mention the damage you
could do to the motor don't drive it till you can afford to fix it properly.
The damage is already done...and K&W Block Sealer certainly won't exacerbate the problems.

You drain the cooling system... refill with clean water...pour in the Block Seal and run the engine 30 minutes or so. Drain the water and let the engine cool overnight. Refill with anti-freeze and you're set.

It's certainly not a new head gasket. But I've run cars and trucks thousands of miles without any problems after using this product. Doesn't work every time but it's certainly a good product.
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Old 01-11-2009, 07:10 PM   #6
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

If I can't fix something right, I wont do it. Others may prefer to cut corners and jury-rig things, but that's their prerogative.

I'm not trying to sound like a snob, but I've worked on a few vehicles where someone with good intentions used one of these "miracle stop-leak" products, and cleaning that crap out of the radiator and cooling passages is a pain. Not to mention having to take the water pump apart to clean the gunk out of it.

I saw one vehicle where so much of the stop-leak got around the head gasket that it gunked up the exhaust valve seat and I had to re-lap the valves.

THAT is the reason I hate this stuff. If it were up to me, the stuff would be made illegal.
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Old 01-12-2009, 08:22 PM   #7
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

Whatever you do, when its repaired, make real sure the temp. sensor, relay and cooling fan are operating correctly. Those are usually the cause of overheating especially in the winter when A.C. is not used. The A.C. on most cars over-rides the sensor and turns cooling fan on.

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Old 03-08-2010, 02:04 AM   #8
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

Will using the block seal also stop the overheating? I didnt use K&W but just Barq's that you just add to the cooling system and thats it. It made my car run fine again like before but it begins to overheat within a few minutes. Should I try K&W, draining the system and everything instead to fix the overheating? I had no problems till one night my car just shut off, coolant was gone (had just topped off), and was overheating.

driving a 1997 mercedes benz c230 btw.
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Old 03-08-2010, 03:02 AM   #9
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

if you got that motor that hot find a new motor, a lot cheaper if the body is in good shape

jeff
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Old 03-08-2010, 04:06 AM   #10
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

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Originally Posted by RAYJAY View Post
if you got that motor that hot find a new motor, a lot cheaper if the body is in good shape

jeff
talking to me or original poster?
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Old 03-08-2010, 07:03 PM   #11
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

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Originally Posted by airick View Post
talking to me or original poster?
the orginal poster sorry
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Old 03-08-2010, 08:46 PM   #12
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

K&W and others like it - best I have used is Moroso Ceramic Seal - are for sealing cracks. They do work to a certain extent. They will NOT repair gasket damage. If you toasted the head and the gasket along with it (what it sounds like) there is only one repair and that's to remove the head, repair any damage, surface the head to provide a good sealing surface and install a new gasket - provided the block deck checks within spec for flatness.
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Old 03-08-2010, 08:52 PM   #13
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

Quote:
Originally Posted by BigChevy80 View Post
If I can't fix something right, I wont do it. Others may prefer to cut corners and jury-rig things, but that's their prerogative.

I'm not trying to sound like a snob, but I've worked on a few vehicles where someone with good intentions used one of these "miracle stop-leak" products, and cleaning that crap out of the radiator and cooling passages is a pain. Not to mention having to take the water pump apart to clean the gunk out of it.

I saw one vehicle where so much of the stop-leak got around the head gasket that it gunked up the exhaust valve seat and I had to re-lap the valves.

THAT is the reason I hate this stuff. If it were up to me, the stuff would be made illegal.
Then you'll love this - I put the (then new) 500 HP 351C in the race car in 2008. The block had several cracks repaired internally and I thought we got them all. Oops, on fire up there was a 1 1/2" long crack in the water jacket near #1 cylinder on the outside. Water running down the block onto the floor. Pretty decent leak.

Dumped in a full bottle of Moroso Ceramic Seal and that stopped it right up, ran the engine the full 2008 season (about 450 passes) with no problems. Pulled the motor in the fall and pinned up the crack. The motor runs nice and cool, no damage or other issues with the radiator, pump, heads, etc. Ceramic seal is a commonly used product with aluminum race heads to catch any casting porosity. So the magic bottle cures do have their place. BUT- they will not fix a gasket issue.
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Old 03-04-2013, 09:32 PM   #14
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

And no residue in the block? I've been warned not to use this in my 6.5 Chevy Turbo diesel. I have a bad head gasket
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Old 03-05-2013, 04:02 PM   #15
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

My dad did it in his old Toyota mini van (1987) and it held up over a year and he has an hour drive to work everyday. His thoughts were that it was not worth fixing and he would see how long it will last. Once it started leaking again he sold the van to a guy that wanted the int. to put in his own van (parts or repair deal).
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Old 03-05-2013, 05:05 PM   #16
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

Quote:
Originally Posted by jimon007 View Post
*********P.S. This was posted on introduction but realised that I should post here. Sorry for double postings**************


Hi!
I live in Wellington, NZ. I have Subaru Legacy TS-R Non-Turbo 1998 and according to mechanic it has blown head gaskets. I have radiator repaired, hose s refitted, themostats checked. What it does is:

Symptom: For the first 20 or 30 mins okay but the temp goes up to Red zone. When I open the bonnet I found that the coolant in the reservoir was boiling (sort of). Then turned off the engine and found there were loss of coolant. It drives okay except getting overheated.

Possible cause: I drove long trip with faulty tyres (they bounce) and found there were no coolant left. So I filled in with coolant (concentration without missing with water) and anti-leak sealant (didn't follow the instruction - should have shaked vigorously but found it later) then it drove well. I found some smoke the other day and didn't check. I operated air con full (it is summer here) and drove longer than usual distance. Suddenly the car stopped in the middle of road. Cooled it down and managed to park. I came back to the car 2 hours later and found the car was driveable (should have checked the coolant). I drove people off and on my way back to home found the temp was so high. I stopped at patrol station and found the steam coming out. I added some water (quite a lot) and cool it down before drove to home (about 10 mins driving). Then I parked the car for 3 weeks and went to garage to repair the radiator. He repaired and told me it should be okay but watch out for possible damage to the head gasket. I drove it for 30 mins and found the overheating problem (losing coolant...and it boiled but no steam etc) so I contacted the mechanic and left the car with him. He checked the themostats and test drove. It was intially okay for 20 mins then overheated. He told me he did the pressure test and it has blown head gaskets and it would cost me approx $2000(US$1100?).

I do not have the money. So I am looking for the option using "Engine Block sealer" (i.e. K&W Block sealer or similar). I found this while I was surfing for the advice. Reading from some of posts here that "2nd hand car dealers use the sealer to their cars. Is it true? Then it might be able to solve my problem . Any advice/suggestion or first hand experience you would like to share with me? I'd really appreciate your help in advance.

I am just new here and feel like a baby. I would really appreciate your TLC
Welcome to GJ. Some hard love here. With your limited understanding of what should and should not be done to an automobile, I'm suggesting you sell the car and use public transportation or a bicycle. You will never be able to keep an automobile in safe, dependable running condition.
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Old 03-05-2013, 05:43 PM   #17
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Originally Posted by pop pop View Post
Welcome to GJ. Some hard love here. With your limited understanding of what should and should not be done to an automobile, I'm suggesting you sell the car and use public transportation or a bicycle. You will never be able to keep an automobile in safe, dependable running condition.
I guess learning is out of the question?
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Old 03-05-2013, 06:04 PM   #18
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

The OP sounds to me like a guy with very limited experience and no money....ie bad tires, ran out of coolant etc .....and looking for a cheap way out.

Sorry to tell you this, but sometimes there is no cheap way out.

Either fix the motor right or look for a good used one in the pic N pull and change it out. There are no bandaids for blown head gaskets.

Good luck!
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Old 03-06-2013, 02:09 PM   #19
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

K&W sealer is another wonderful additive from "Miracle Products Inc"
Their motto is.... 'If it works , its a Miracle'

How hard is it to change gaskets on a head??
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Old 03-06-2013, 02:23 PM   #20
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Default Re: Shall I use K&W Block sealer for Blown Head Gasket??

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Originally Posted by BellyUpFish View Post
I guess learning is out of the question?
Learning would be the ideal solution here. Like in learning to stop at the first stop / warning sign. He kept going past several and is now stranded. Repairing this engine will not fix this problem in my opinion.
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