Head Gasket Sealer

**GriZZly** · 31-10-2007, 03:03 PM

Hi guys, i blew my head gasket a few months ago and had it replaced and the bottom end rebuilt in my St185 at the same time. The car runs fine and van handle ~5psi of boost without any cooling problems, if you hold it at 10psi for 10+ seconds the temp starts to spike upto 105C (i havent pushed it any harder than that) and then drops back again once you start cruising again.. i had a co2 test done and there is a slight leak in the hg which is causing the heating problems..

Basically i want to know of people experiences with using the sealant stuff you stick in your coolant? Ive got a brand new radiator to put in so im not worried about clogging up the current one..

thanks in advance

**lojik** · 31-10-2007, 03:22 PM

Surely after spending all the cash on a rebuild you'd want to fix the problem properly?

**GriZZly** · 31-10-2007, 03:32 PM

yes.. but if it can be done simply why not..

**IN 05 NT** · 31-10-2007, 06:18 PM

its only temporary..... will only last a few months,

work mate put the shit in his EA falcon as it had a BHG, lasted 3 months,

blake

**MRMOPARMAN** · 31-10-2007, 06:30 PM

problem is the shit doesnt only go through the radiator, it goes through your block, your heater core, heater tap etc etc. and its near impossible to get out without replacing/hot dipping.

use chemiweld etc for bushbashers, not street/race cars!

but if you must ive have good results from a product called 'seal up'. you can get it from supercheap. clear bottle with brown shit in the bottom.

**KARNAGE** · 01-11-2007, 10:04 PM

Im with Lojik it is would be a lot better to spend the time and the extra cash on doing it properly the first time not only will it fix properly, it but i will give you piece of mind. I have heard of seal up as well but it also is a very temporary problem solver.

**JustenGT8** · 01-11-2007, 10:10 PM

It will never stand up to spirited use....it's just a band aid so you can limp the car until you can fix it or pass it on to the next sucker.

Why have a built engine you can't use??

**Joshstix** · 01-11-2007, 11:15 PM

Have you retorqued the head studs at all?

**GriZZly** · 02-11-2007, 09:41 PM

Justen: I thought there was stuff that can fill the gaps, in a non bandaid solution fashion.. The leak is so minor i hold it on 10psi at 4000rpm for 10 seconds before the temp even starts moving ~30seconds before it really starts warming up (105C).. For street use its fine but as you say, i want it to see the track and itll always be at the back of my mind otherwise

Joshstix: Havent retorqued the bolts.. They were done at 70nm so it may be an idea.. Ill check anyway..

Cheers

**JustenGT8** · 02-11-2007, 09:45 PM

Nope sorry, there's nothing out there that will do what you are after. Longer you leave it the more work you are looking at.....just pull the head and do the HG. As long as you don't have the inlet manifold braces on you can do the HG with engine in car.

**love ke70** · 02-11-2007, 10:03 PM

just try tightening the headgasket a little.
worked on...an old laser im pretty sure i did it too. was getting coolant through a cylinder. enough to give her a good miss.
torqued head bolts and ran fine til being sold a year or 2 later

**rob_o** · 03-11-2007, 10:35 AM

"Just filling the gaps" IS a bandaid solution.

If I were you, then I would get it done properly. Putting chemiweld in your car is really dodgy, and it will get VERY messy - just like MRMOPARMAN mentioned.

I bought a 1JZ Cressida with supposed BHG (HG was fine) and the previous owner put chemiweld in it. The whole engine had to be cleaned, as well as getting the radiator properly chemically cleaned and flushed.