BHG symptoms...but no BHG?

[RNEMESiS42]

Thanks for the response, I'll check it out in the morning. I've never directly messed with my overflow tank, but it sure would be nice if it's as simple as this.

[RNEMESiS42]

There's just the one line from the top of my radiator to the cap of the overflow. It all looks fine to me.

[Bill UK]

1. Thermostat not opening. (stuck closed)
2. Water pump impellor vanes corrode.
3. Blocked rad
4. Viscous fan coupling slipping
5. Also check this out Link

[oregonjoe]

I too had the same problems, blowing coolant out reservoir, no hot temp on gauge, negative test for exhaust gas – but in the end, it still was a BHG, The best test for BHG in No 6 cylinder is to look at spark plug – you will see a difference in the plug for the BHG cylinder compared to the rest (looks like the coolant color). The EG test does not find minor leaks when the compression is high.

Looks at the plugs and if it looks like a BHG, Runs like a BHG and smells like a BHG – then it probably is!

I had to pull and rebuild my engine as a result.

[RNEMESiS42]

Damn, I'll look at the plugs, then. A few of those plugs are so annoying to get at, though!

[RNEMESiS42]

SO, I thought the easiest and cheapest thing to do would be to replace the thermostat for starters. I picked one up form NAPA and proceeded to replace it. The bolts for the thermostat housing were rusted, and BOTH of them broke at the head when I was using a socket to get them out. This left the rest of the bolts stuck on the part that's attached to the engine.
Does anyone know the part number for this so I can replace it? All I can find is the thermostat housing (number 8 in the picture below), not the piece that it attaches to.

[2jzmaestro]

good thing you asked.

i bought parts for my 2jz at http://toyotapartszone.com

they have something called "hot spots" on their digram

gives you all the parts name and number

its a really helpful website and cheap parts

hope this helps

[Bill UK]

Originally Posted by RNEMESiS42

The bolts for the thermostat housing were rusted, and BOTH of them broke at the head when I was using a socket to get them out. This left the rest of the bolts stuck on the part that's attached to the engine.

Use this website when searching for parts Link The water outlet housing part # is 16333-42040 price 35.72 Euro`s Gasket 16343-42020 at 2.0 Euro`s The studs are not listed, I think they are 6.0mm. You should be able to remove the broken studs with a stud extractor (easer said than done) or ask a machine shop to remove them, a lot cheaper than buying a new housing.