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Old 10-01-2008, 04:56 AM   #51
Marnix
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Pat, using the thin head gaskets with the old style belt tensioner is a no-go! Use the later setup with the extra idler to get correct belt tension! Otherwise you'll risk skipping a tooth (or two).
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Old 10-01-2008, 08:20 AM   #52
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Marnix,

I am monitoring the thread and looking over Pat's shoulder since I am doing the same with stock heads rather than the "good" heads and intake Pat is using.

Thanks for the info, I am in the process of picking up the extra stuff I will need to get the DOHC heads to work...Cam timing gears, timing covers, etc.

I wasn't sure about the tensioner but after your observation, I will plan to just leave the original tensioner that came on my 05 SOHC engine since I too am going to use the STi headgaskets.

Les

Last edited by HillbillyLes; 10-01-2008 at 09:28 AM.
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Old 10-01-2008, 09:16 AM   #53
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---- ----

Last edited by HillbillyLes; 10-01-2008 at 10:48 AM.
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Old 10-01-2008, 09:28 AM   #54
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Hey Pat,

I think I've got the switch that you need for testing, from that '98 OB I parted out. I'll have to look around when I get home to see if I pulled it or not. I pulled so many parts off the car I can't remember them all

If I've got it, it has your name on it, and I'm close so you could get it in a couple of days.

Aaron
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Old 10-01-2008, 10:09 AM   #55
Patrick Olsen
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Quote:
Originally Posted by Marnix View Post
Pat, using the thin head gaskets with the old style belt tensioner is a no-go! Use the later setup with the extra idler to get correct belt tension! Otherwise you'll risk skipping a tooth (or two).
Well that's a big fat bag of suck. I assume you say that based on personal experience?

More parts to buy, so that sucks. But at least I didn't run the engine long with the old tensioner, and the car is not going to the track tomorrow because of the electrical issues, so it could've been worse.

Quote:
Originally Posted by HillbillyLes View Post
Pat,
RE: confirmation of the switch, having a fairly extensive background in electronics ( past electronic technician, current Amateur Extra class ham radio operator, a few years of formal electronics schooling, etc) ...
Les, in the interest of keeping this thread focused on the engine front (despite my own troubleshooting update... ) could you edit that post out and stick it in the other thread?

Pat
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Old 10-01-2008, 10:49 AM   #56
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Your wish is my command --- ---
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Old 10-02-2008, 12:30 PM   #57
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Quote:
Originally Posted by Patrick Olsen View Post
Well that's a big fat bag of suck. I assume you say that based on personal experience?
Yes, fortunately only skipped one tooth, within 250 kms after the build. My build was a MY05 n/a short block with ditto pistons, STI rods, Phase I DOHC heads. I used the 0.058 mm head gaskets. I also had to modify my intake manifold to fit. After the belt skipped, I got the other tensioner setup and no problems since.

You can use bracket and tensioner off a USDM WRX, when using SOHC bracket you'll loose one mounting point for the LH rear belt cover.
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Old 10-02-2008, 01:07 PM   #58
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If all parts were stock other than the STi rods, sounds like what I am working on. How did the engine turn out power wise...notice any difference from the original DOHC engine with the higher CR and Phase 2 shortblock.....power level, torque curve, etc....Just curious.

Les
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Old 10-03-2008, 01:07 AM   #59
Patrick Olsen
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Quote:
Originally Posted by Marnix View Post
Yes, fortunately only skipped one tooth, within 250 kms after the build. My build was a MY05 n/a short block with ditto pistons, STI rods, Phase I DOHC heads. I used the 0.058 mm head gaskets. I also had to modify my intake manifold to fit. After the belt skipped, I got the other tensioner setup and no problems since.

You can use bracket and tensioner off a USDM WRX, when using SOHC bracket you'll loose one mounting point for the LH rear belt cover.
Thanks, I much, much appreciate the heads up! Sucks that I've gotta order a couple parts (and wait for them to appear), but obviously it would suck more to screw up the engine!

Pat
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Old 10-04-2008, 05:29 PM   #60
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Well, Pat, another week has come and gone....Did you get to race Thursday? How is the troubleshooting going?

Update, Please.

Les
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Old 10-04-2008, 11:18 PM   #61
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I gave up on taking the Subaru to the track - obviously the electrical glitch wasn't helping, but even if I had gotten that figured out last weekend, Marnix' revelation about the timing belt slipping with the old style tensioner pretty much ruled out the Subaru going. So, I took my CTS-V instead.

Today I disassembled the old engine so I could ship the heads to some guy in Bangladesh. Or was it Missouri? Meh, whatevah.

Tomorrow I should get down to some electrical troubleshooting, and I need to pull apart the front of the engine to be ready to install the new timing belt tensioner and bracket. I also have a leak near the front of the driver side valve cover, so I'll pull that off and fiddle with it (which should be so much fun with the engine in the car ).

Pat
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Old 10-04-2008, 11:35 PM   #62
HillbillyLes
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Bangledesh!

HEHE don't know if you realized but you made more a funny than you realized...It actually IS "BANG"ledesh....That's why I'm putting the new engine in.

OK, well not THAT funny but maybe at least an ironic choice of words.

L
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Old 01-15-2009, 05:47 PM   #63
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Any update on your build Pat?
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Old 01-15-2009, 06:19 PM   #64
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He's off being sailor man.
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Old 01-15-2009, 10:26 PM   #65
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His shore time should be coming up pretty shortly, shouldn't it?

L
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Old 01-28-2009, 08:58 AM   #66
Patrick Olsen
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Yup, shore time is coming. Right now I'm in Guam, I'll be back at home in under a week. The car's been sitting in my driveway since early November, with bits of the engine on a workbench in the garage. I need to pull the engine out to fix a couple oil leaks, then figure out what electrical gremlins keep screwing with it running, and hopefully it'll be back on the road within a few weeks. We'll see...

Pat
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Old 01-28-2009, 10:45 AM   #67
HillbillyLes
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Pat,
Good to hear from you. Drop me an e-mail (HillbillyLes@sbcglobal.net) when you get in or when you get a chance. I have a couple of questions about the JDM heads....engine is assembled and installed since late Nov or early Dec.

Also...I don't remember where your home location is but since you were last land bound in the states we trravelled from MO to SanDiego for our son's USMC boot camp graduation at MCRD. While there we got to see the USS Ronald Reagan in port (from across the bay) and got to tour the USS Midway...my father was on the Intrepid in the 50's so I knew the carriers were large but never had ANY concept until we were standing in the shadow of the Midway...WOW!! there is a LOT of real estate there!! and we only toured the flight deck and hangar deck (I think that is what is called). I also got to walk through an old diesel powered Soviet sub.....out at sea for manths in that....I think not!!

Have a safe trip as you finish out your travels....

Les
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Old 01-29-2009, 08:35 AM   #68
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hey pat, figured you'd be out in the big boat somewhere, shoot me a pm about those wheels you got kicking around when you get back, I'm shopping right now.
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Old 01-29-2009, 06:00 PM   #69
HillbillyLes
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Quote:
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Yup, shore time is coming. Right now I'm in Guam, I'll be back at home in under a week....
....
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Old 03-21-2009, 11:12 PM   #70
Patrick Olsen
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Well, progress has been very slow on the car. The car sat in my driveway all winter while I was at sea. I got home from deployment in early February, then went to visit family for a bit. My driveway has juuuust enough slope to it that I couldn't push the car into the garage by myself. I actually borrowed my buddy's F150 and pulled the car to the top of the driveway and tried rolling downhill then up the little slope at the garage entrance, but it wasn't enough. Finally, a few weekends back I got a couple other guys from work to stop by and push the car in.

Last weekend I actually got around to starting work on it. I got the engine out last Saturday and went to helicoil one of the valve cover bolts. I almost immediately snapped off a drill bit in the hole - awesome! - but after a short period of time thinking I had just completely ****ed myself and was going to have to pull the head off to have a machine shop get the bit out, I was able to reach in with needle nose pliers and pull it out. Phew! Got the two partially stripped bolt holes on the driver side head helicoiled and dropped the engine back in the car. For once (probably because I hadn't moved anything at all) the engine slid right onto the transmission on the first attempt. Woohoo!

When I reinstalled the timing belt yesterday, though, I ran into another issue - the tensioner is dead. My initial thought was that I had picked up a new tensioner last fall and had run it only during my aborted ~10 mile break-in run. Reading back through this thread now, though, I realize that I didn't identify the tensioner was an issue until Marnix pointed it out after I had done that initial run. So now I'm thinking this must be a used tensioner that I got when I bought the used tensioner bracket, hence my comment at the beginning of the video is incorrect. Here's how loose the tensioner was. Anyway, picked up a new tensioner today at the local dealer and just installed that.

I still need to reinstall the header, radiator, accessories, and fill all the fluids. And, most importantly, I still need to figure out the electrical fault, as I never made any progress on that last fall before I went to sea. Oh, and I'm going back out to sea in a couple weeks...

Pat
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Old 03-22-2009, 03:41 AM   #71
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Was that the tensioner you got from me? I got it in a box of parts and never pulled the pin.....
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Old 03-22-2009, 03:46 AM   #72
Patrick Olsen
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I think so? Until I went back and did some looking through this thread and some old "for sale/wanted" threads, I couldn't remember how all this transpired. I think I did get it from you along with the bracket.

Pat
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Old 03-22-2009, 09:12 AM   #73
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You probably wanna buy a new one....but just in case, I have both new and old style tensioners that are known to be good. Shoot me an address if you're interested.


Jay
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Old 03-22-2009, 12:00 PM   #74
Patrick Olsen
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Quote:
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Anyway, picked up a new tensioner today at the local dealer and just installed that.
OMG, reading comprehenshun pwns you!!!
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Old 03-22-2009, 02:00 PM   #75
Storm
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I don't reed....I scan!

Can I has a huked on fonix?

Jay
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