purchased a 99 OBL that was DOA , head gasket -- pulled engine

did hg job with felpro mls , heads had 2000th warpage , presssure tested and alumafluxed.Head surface polished finish ( Knowthe prob assoc with head surf being too rough) the multi step process of torquing and angle degree tighting was meticulious ,

POSITIVE burping was done , almost foamy mini bubbles seen in radiator still. previous owner had removed therm when purchased doa SOL.

pan tested therm , yes we checked the fans 1stthing

seems to regulate then bam over heats, Burped and reburped, if it is burping would it show intermittet like this ?? Drilled 1/4 hole in therm to eliminate bubble build up in h20 pump took longer to overheat than earlier but same symptoms.

If it is HG issue since already did HG etc and did not fix is weakness in cooling or engine ??

 

Usually heads warp, does block warp in this case in the ej25d

 

three ??

bad therm ?? probably not but did not use oem ( see above mod)

burped yes

HG job oem vs felpro ?? prob ??

I can tell you from experience that your problem is the HG's that you used. I too have used other than Subaru HG's and they failed within 300 miles. Same engine redone with Subaru HG's and no more overheating. All HG's are not the same.

 

Unfortunately you will have to do the job again, but I bet the engine holds once you have the new gaskets in.

 

Good Luck

here i am replying to your PM.

 

i agree with above statement. probably don't want to jump without checking some simpler things, but sounds like headgaskets.

Well - that makes a few of us then.

Does it have a good Subaru OEM thermostat in it?

Does it have a good Subaru OEM thermostat in it?

no, he's got an aftermarket stat in there.

Why oh why oh why oh WHY would anyone go to all that work and not use Subaru OEM HG's? -at least not anyone that reads this board. That's one mistake no one will make twice!

Check the radiator, I did a complete rebuild on an EJ engine, only to find out it was the radiator that was causing the problem.

I had suggested sending the rad out for cleaning and pressure testing in a PM when all this started last night. Folks run all kinds of crap through these cars in addition to a new rad cap and thermostat before realizing what the repair really entails.

 

Perhaps the OP should post the PM's that several of us replied to. Seems like we're all basically saying the same stuff. After all we've all seen this before.

take it to a shop with a exhaust sniffer and have them sniff the coolant res while the car is running.

burp it.