Beau
Well-Known Member
- Joined
- Jan 28, 2011
- Messages
- 2,014
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Lucky maybe. What year is your 90? I know toyota improved the head apparently on 99 models+. Mine being a 96 had it's head crack at about 70k miles. Dad was cruising down the motorway when he had a little loss of power and white smoke out the back. Drove like this for a good year topping up the coolant, not realizing the water was eating away at the cylinders. Long story short, it ended up having a full engine replacement.
Fast forward to about 5 years ago now, driving here in the states, one of the coolant lines blows off and the engine overheats badly. When I saw the temp gauge it was pinned to the top and I was cruising around 90-100 on the I-95. Pulled over asap and switched the engine off. After it cooled, it would run but would take 5-10 seconds to start (loss of compression). Long story short, head was warped badly, but not CRACKED. If you guys followed my thread, you know I then went on to bake/straighten this same head in my oven multiple times to straighten it and had the engine running 100% well for around 4 years, until one day out of no where it was pushing coolant back out. AMC head now on it.
So sometimes I still think it's a mystery as to what exactly causes these heads to crack. Heat, Combustion temps. The NZ chaps seem to think it's poor injectors creating hot spots during combustion. Don't know about that, I have 250k miles on my stock injectors and she "seems" fine.... What's the saying, if it ain't broke....
Fast forward to about 5 years ago now, driving here in the states, one of the coolant lines blows off and the engine overheats badly. When I saw the temp gauge it was pinned to the top and I was cruising around 90-100 on the I-95. Pulled over asap and switched the engine off. After it cooled, it would run but would take 5-10 seconds to start (loss of compression). Long story short, head was warped badly, but not CRACKED. If you guys followed my thread, you know I then went on to bake/straighten this same head in my oven multiple times to straighten it and had the engine running 100% well for around 4 years, until one day out of no where it was pushing coolant back out. AMC head now on it.
So sometimes I still think it's a mystery as to what exactly causes these heads to crack. Heat, Combustion temps. The NZ chaps seem to think it's poor injectors creating hot spots during combustion. Don't know about that, I have 250k miles on my stock injectors and she "seems" fine.... What's the saying, if it ain't broke....