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Old 02-11-2019, 07:01 PM   #1
TedBull
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Join Date: Feb 2019
Default Need advice on heads and valves!

My T belt went while at freeway speed. I bent all exhaust valves and all but two intake valves. All four pistons have marks on them from contact with the exhaust valves. The intake valves are bent, but did not leave marks. I would post pics but I dont have a 3rd party photo site since photobucket.

The contact marks are very light and shallow. The crank and pistons turn over nice and smooth so no obvious bottom end damage. Cylinder bores look good. How should I dress those piston marks???

What replacement valve set do you recommend? Engine is stock 2003 EJ25 sohc N/A. is there a decent inexpensive aftermarket option for valves? Dealer quoted $422 for a complete set of oem valves.

From what I have been reading alot of the time the original seats and guides can be reused and only a little lapping is needed. That sound right? Engine has 150,000 on it. The heads look good, no cracks or Mark's. The valves are visibly bent, but not as bad as what I'm seeing other guys post up.

I have a local machine shop I have used before. I am planning on taking the heads their for the work. Anything different or special about subaru heads that would be better off taking to a subaru shop?

This is just a stock daily driver.
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Old 02-11-2019, 07:14 PM   #2
TedBull
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Default

https://i.imgur.com/RniUdPE.jpg
https://i.imgur.com/VLi89I6.jpg
https://i.imgur.com/lzwb7op.jpg
https://i.imgur.com/Byp6kBH.jpg
https://i.imgur.com/hFYoSRc.jpg
https://i.imgur.com/AgFqmLr.jpg
https://i.imgur.com/Xh4sMwI.jpg
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Old 02-11-2019, 07:16 PM   #3
TedBull
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Got some pics added.
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Old 02-11-2019, 07:27 PM   #4
Hondaslayer
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Gotta use the [IMG] [/IMG] tags to post the pics














Edit: Now that I can see the pics, I wouldn't worry about those pistons, personally. I would pull the pistons and put new rings in because at this point, why not.

For the headwork, as long as the guides are still tight fitting, no worries there. Replace any that are loose or even "feel" or "look" loose. Definitely do new valve guide seals. Most any machine shop should be fine to check, resurface and assemble the heads. The valve spring tool to DIY is not too bad and the process is brainless simple.
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Old 02-11-2019, 09:05 PM   #5
TedBull
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Hondaslayer, thanks for fixing my pics.

Can someone recommend a valve set???
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Old 02-11-2019, 10:29 PM   #6
monkeyposeur
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You could post a want to buy (WTB) ad in the classifieds and pick up some OEM used valves super cheap. I sold a bag of 20 valves for like $20 lol.

You could buy some GSC Power Division Valves for about $230/set, or some Brian Crowers for about $300. I'm sure you can find some cheaper valves on ebay (I just found a set for $40), but I'm not sure about the quality.

At this point, it might be cheaper just to source some heads or a JDM engine. You figure in about $250-475 for new valves, you might need the valve seats cut, valves need to be tipped, heads need to be decked, and and you will need a bunch of new shims/buckets. And then you will need an engine seal kit, new HGs, etc. So now you are getting close to what you would spend on a JDM drop-in low mileage engine ($1100-1500). The JDM engine could install in a day and you'd be back on the road.

Plus you would need to split the block to get a hone, and then you better put in new bearings, and new piston rings. All of this adds up to what you'd spend on a JDM engine.

But most good machine shops can handle subaru heads no problem. There isn't anything special about them really. I would also take them to a shop and see how much they would charge you to replace the valves and get them ready to install. Prices among machine shops can vary wildly.

I had a set of wrx heads decked, valves replaced, seats cut, valve guides replaced, etc., and it was about $850 iirc. When it was all said and done I had about $1600 into the heads since I purchased a really nice set of used heads, and just replaced the exhaust valves (which knowing what I do now I would have just left them since they were in fine shape). I then took them to get chamber matched and the shop completely destroyed them and had them for four months. ****ty story, lol.

EDIT: My bad, I didn't see that you had an NA engine. I'm not sure about sourcing one of those. JDM turbo engines are easily found.
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Old 02-12-2019, 01:06 AM   #7
TedBull
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I may end up going with a JDM import engine if the cost of rebuilding this one gets comparable. I was thinking I might be able to get the valves, head work, gaskets, and the rest of the timing kit and keep it under $800. I was not planning on rings.

I'm still looking for some budget valves. Sombody must have used some Ebay valves or aftermarket oem equivalent.

Rockauto has some

https://www.rockauto.com/en/catalog/subaru,2003,forester,2.5l+h4,1411041,engine,exhaus t+valve,5328

https://www.rockauto.com/en/catalog/subaru,2003,forester,2.5l+h4,1411041,engine,intake +valve,5544

Last edited by TedBull; 02-12-2019 at 01:15 AM.
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Old 02-12-2019, 04:56 PM   #8
TedBull
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Anybody use those rock auto valves???
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Old 02-13-2019, 05:14 PM   #9
joeToye
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I had a head gasket job go sideways where, long story short, my machine shop buggered up one of my heads and the cam seized at start up tearing the timing belt off.

For reference mine is a 2000 EJ25 SOHC from an RS Impreza.

I wanted to inspect and re-ring the pistons and de-glaze the cylinders which requires pulling the engine.

For the heads and valves I just purchased a used EJ25 with heads for $100 off a member here and the machine shop used my 3.5 heads to make 2 good ones. They used OE valves but I probably would've shopped around had I been the one paying for them. Having said that I don't tend to cheap out on parts that are hard to replace or require a lot of work to access in order to replace.
The damage on the pistons was, for the most part, superficial but I removed any high metal and/or stress risers from the tops of the pistons with Kratex and a fine file. I did a minimum amount of metal removal.

That portion was relatively inexpensive but because my car, also a daily driver, and had 330,000kms a lot of rubber or plastic parts were brittle and either broke on disassembly or just couldn't be re-used. AND since I had everything out I put in a new clutch, turn the flywheel, new mounts, seals, gaskets, etc... not to mention the cost of 2 sets of head gaskets, 2 timing belts, 2 sets of head bolts, fluids, sealant etc ... cost me around $2500 CAD ($1900 USD) using mostly OE Subaru parts and, other than rebuilding the heads, I did all the work.



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