Definitely worth a try.
Used on mate's 2010 Hi-Ace Toyota van, 2.4L petrol/lpg, running very rough and misfiring low power with strong red coolant stain on two spark plugs and water running from exhaust, gave it new plugs and the Nulon HGR and within 2 minutes at idle the stream stopped, still a little rough with an excess of vapour, after 10 minutes vapour ceased, all signs of leak disappeared, idled smoothly, runs powerfully, has since been on long trips in hot weather with AC and fully loaded. New plugs were important to ensure ignition and heating of the bad cylinders to set the sealant. Couldn't be happier.
Purchased at Supacheap for $55.00.
Worst waist of money ever. I followed the instructions and it did less than nothing. Apparently my fault nulon said like idk how to poor a bottle in the radiator
works on my wrx ej255
!! Update to the review below !!
The seal worked only for one month. It is totally waste of money. DO NOT BUY !!
Engine overheating. replaced the leaking radiator, new thermostats, and the faulty radiator caps (my car has 2). The car still overheated and I found that I was losing coolant.
I did the headgasket leak test and confirmed there was a small headgasket leak. Well, it was big enough to cause problem.
I was thinking if I shoud sell or pull the engine to rebuild and I came across this product. Did a lot of research, seemed worth the shot.
Purchased in February 2020 for $50.00.
It hasn't worked.
Used the recommended coolent, changed the oil before adding it, flushed and bled the radiator before adding it, ran the engine for the recommended time with heaters on full blast. No change, still overheating.
Purchased in April 2019 at Autobarn for $49.99.
This product works for us
This product works for us we were told the best thing we could do what’s the scrap the car as it would cost us $3000 to fix the head pretty devastating, bought this product followed instructions got the car going it saved the day for me
Purchased in February 2019 at Autobarn for $63.00.
Ok. So had problems with car (vt commodore) over heating and idling roughly even after replacing spark plugs and flushing radiator. After googling solutions found this stuff online and after using, have had immediate improvement. No rough idling or over heating. No white smoke or water coming out of exhaust. Radiators holding coolant 100 %, where as before, I was topping it up every day. Through My impressed. Best 50 bucks I ever spent. Thanks Nylon.
Purchased in February 2019 for $65.00.
Ford Falcon EL 6 cyl.. blown head gasket and running like a steam engine until taking the chance and adding this product. After adding per instructions, next day went for a test drive and it was still a cop magnet, steam out of exhaust and missing badly as if on 5 cylinders. After about 2kms it smoothed out and noticed idling was perfect, so then took it out on a 100kph speed zone. Ran like a sewing machine and next morning noticed dry coolant on head & block under No.1 spark plug. Feel I got lucky that it may have been a hairline fracture in h...ead gasket at front of engine, removed spark plug to confirm. Now it's simply a matter of how long it lasts? I like the word 'permanent', but this is sufficient to keep car running until I can go out and buy someone elses problems. Would highly recommend, if it doesn't work it obviously means the damage is far too extensive, over quoted 0.8mm crack, definitely worth taking a chance given full repair costs.
It actually Works
My EL ford had classic blown head gasket symptoms (loosing coolant, white residue in oil filler cap and rough starting) so after reading hundreds of positive reviews on this product decided to give it a go. Followed all directions and was a bit worried the following day when I started the car and it was still rough to start & idle but it came good quickly and ever since starts and idles perfectly.
Coolant level has not dropped at all in almost 2000 klm and no sign of any moisture under the oil cap. YES it does what it claims.
One important t...
This item did not last one day. If your car has issues with the head fix it properly and put the money that this junk costs into a proper repair. I tried the cheap way out and knew that I knew better. $38.00 all over the road. Total rubbish Nulon should be ashamed. Tony. Tasmania Australia.
My 4x4 was leaking 1L of coolant every 500kms or so & air bubbles in the reservoir. Used this product and 6 months on with over 5000kms (including a 1500km round trip to the Victorian High Country with over 250km low range heavy driving) I haven’t lost one bit of coolant. Very happy customer. Let’s hope it goes on fine for years to come
1993 Pajero I paid $1000 plus registration. I didn't have much money after about 2 months steam started coming out from under the bonnet. From the dipstick (cracked head or gasket) could cost thousands. I followed the instructions to the letter changing coolant and even replacing radiator hoses. Amazing Worked perfectly.
I will re post if it all goes bad.
April 16th 2018 Update: Blocked radiator and heater cores
It worked great to start with fixed the leaking head gasket no more problems there. But after 10 days no more heater and the e...ngine is over heating. It seems to be getting worse the other day it was getting hot going up hill but now it gets hot on the flat only going 90 kilometres an hour. If you're going to use it drain you system out after and flush refill with clean coolant. Before it's too late.
Fantastic Product - Worked for me !
I own a 1998 Holden Rodeo (TF) Ute, V6 and done over 300,000Km. The Ute started to use over a litre of coolant per week and quickly got worse. I notice air bubbles coming up in the top Radiator tank and was told I had a blown Head gasket, Cracked Head or Block. As the Ute is only valued at $3,500,a costly repair was out of the question. I search Google and found this Nulon Head Gasket Repair product. Not convinced about additives, I had nothing to lose, so bought a bottle. Followed the instructions carefully and to my utter surprise it worked...maybe still early days, but I have not added coolant for 8 days !!
Questions & Answers
Is there any difference between nulon radiator and engine block stop leak versus nulon headgasket repair product
Is this product compatible with lpg cars
Lpg as far as the engine is concerned is only a fuel substitute for petrol. One that can burn a little hotter and apparently can put more stress on head gaskets and cause earlier failures because of gas metering faults causing lean running. Mechanically, the coolant passages, block, gaskets and cylinder head are the same. The sealant will work in exactly the same way but as with any engine, an lpg engine should be tuned correctly to avoid excess stresses from overheating causing recurrence of issues. Signs of potential lean fuel mixture running include rough idle or misfire, hesitation or reduced power under load, and hot running.
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