Overheated a 2000 isuzu rodeo 2.2 litre

first post is a viable option but i would do some diagnostic work first , check the OBDII codes as may be a sensor/switch that has overheated or got fried , check cylinder compressions to check for head gasket etc

blown head gasket.

can be lots of things,,,
overheated engine, warped head, and now head gasket blown.
or cracked block.
or cracked heads.
we find this doing tests. want to test or gue$$.
do a compression test or the cylinder leak down test.
on DOHC we do the latter, by hand.

This can be a very serious problem, please have your Rodeo checked by a REPUTABLE shop as soon as possible.

Water in the oil means one of 3 things:

1) Cracked or warped cylinder head
2) Cracked engine block
3) Blown head gasket

Blown head gasket is the best you can hope for. And cracked or warped cylinder head is next most likely. A cracked engine block is least likely of the three. Have you noticed anything unusual, heard any noises? And has the car overheated really badly?

You probably have a cracked cylinder head. Has the car overheated or been run really low on
oil?

Could also be a blown head gasket. But the clunking sound when you hit bumps makes me
think the one of the cylinder heads is cracked.

But oil in the antifreeze is a sign of:

1) Cracked cylinder head.
2) Cracked engine block
3) Blown head gasket.

I think its a cylinder head because its a lot easier to crack a cylinder head than an engine
block.

if its white smoke coming out the tail pipe then its burning coolant.possible head gasket.cracked cylinder head,cracked block,it will have to be block tested to see if combustion chamber gases are in the cooling system.

probably a blown head gasket. Run a compresion test to be sure.

Please see my tip at http://www.fixya.com/cars/r6715318-causes_gasoline_engine_misfires . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

These two problems are related, your engine is overheating because there isn't enough coolant to dissipate the heat. There are three main causes for coolant in the engine oil:

1. Cracked head
2. Blown head or intake gasket
3. Cracked block.

The gaskets are an easy and relatively cheap fix, the head replacemnet isn't to difficult but will run you more than the gaskets. If the block is cracked (pretty rare) you'll need a new motor because it's going to comletelyu fail sooner or later.

This also happened to mine and here is what the problem was:

The car was overheating although my temp gauge was not up to the top.

1) I found that there was a cracked hose coming from the fire wall (separates engine from inside of car). Cost around $3.
2) In looking at the engine I found oil around the engine head. This was from an apparent cracked gasket ($95 full set).
3) I replaced the gasket and in doing so had to remove the hose connecting the air box to the carburetor. That hose is actually made up of three components. The one in the center turned out to be broken and deteriorating on the bottom. This makes sense since the engine was getting hot and the hose is directly above the engine block.
4) I decided to check the exhaust manifold and guess what? It has a 6 inch crack running up the center. The only way you will see this is by removing the heat shield. It's on the bottom right hand side of your engine as you are facing it.

So look at the engine block for black oil marks from in between the top and bottom.
Inspect the exhaust manifold for cracks.
Inspect all hoses for cracks. Get under your car as well and look for leaks, a sure way to find hose cracks. Good luck. They are great cars if you pluck a couple hundred into it a couple times a year. Beats a car payment.