Re: EW1 and D15A2 engines - differences in heads?
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Re: EW1 and D15A2 engines - differences in heads?
| jim beam | 30 Jun 2006 13:37 |
>>all symptoms are classic cam timing is not set correctly. besides, if >>this was the wrong head, it wouldn't go on at all. [quoted text clipped - 14 lines] > a difference between the 87 D15A2 camshaft and previous years EW1 > camshaft timing - even though they are both for manual transaxles. that's more than likely the case. if you can't dig out a manual that gives you the info, you may need to experiment. iirc, if it's coughing out of the carb, the timing's too retarded, so advance it a tooth or two. there should be a small degree of opening overlap between exhaust and intake on the exhaust stroke of the piston, and that should be at tdc - aim for that. obviously, rotate the crank by hand a few times before firing to make sure it was re-toothed in the right direction and that you don't get interference.
i have no idea of the specs for your vehicle, but fwiw, the difference between the d15b2 and the d16a6 [same head] on the 88-91 civic is two teeth. there's two sets of timing marks - in the former, two lines get set parallel with the top of the head, in the latter, a single mark aligns with a notch below the pulley wheel. if you have those features on yours and they offer a tooth or two's difference, that's where i'd start experimenting.
> That > is what I was hoping to find out. Depending on what source you use, I [quoted text clipped - 11 lines] > just another ??? that makes me wonder how much else is different > between EW1 and D15A2. if the head's on, doesn't leak, and the peripherals fit, i don't think that's your biggest problem.
> Tom |
| Tom | 30 Jun 2006 08:21 |
> all symptoms are classic cam timing is not set correctly. besides, if > this was the wrong head, it wouldn't go on at all. [quoted text clipped - 3 lines] > the oil disappeared. next time, replace the whole motor. junkers are > cheap enough and will save you a /lot/ of messing about. Oil problem was leaving for California to Tuscon Arizona in too much of a hurry and not checking oil level before I left. Oil lite came on 50 miles before Gila Bend and - with no towns inbetween - I decided to go for it. The cam snapped about 15 miles down the road.Total stupidity on my part. Sad part is the engine was running just perfect before my screwup. I have checked the cam timing on 5 separate occasions - I am confident the timing is set correctly, but there is still a good chance there is a difference between the 87 D15A2 camshaft and previous years EW1 camshaft timing - even though they are both for manual transaxles. That is what I was hoping to find out. Depending on what source you use, I have found varying degree's of conflicting information. I am finding it very difficult to find a source I can depend upon. The Haynes and Chiltons manuals are an absolute joke. Mis-information in both manuals seem to have no end. All they are good for is kindling for the fire place in my opinion. Unfortunately, in Tuscon the Honda's are picked pretty clean. One would think the heads would be the same if they slip over the studs and everything bolts on ok. But consider this - the block has the head locating pins on the two INSIDE holes, but the head has them on the far OUTSIDE two holes! Since there are 3 studs in place of head bolts on the block, I figured the locating pins were not that necessary. Its just another ??? that makes me wonder how much else is different between EW1 and D15A2.
Tom
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| jim beam | 30 Jun 2006 02:52 |
> Hi All- > [quoted text clipped - 30 lines] > > Tom all symptoms are classic cam timing is not set correctly. besides, if this was the wrong head, it wouldn't go on at all.
additionally, if the previous cam ruined because of low oil, be prepared for the block to be shot too. and you want to track down the reason why the oil disappeared. next time, replace the whole motor. junkers are cheap enough and will save you a /lot/ of messing about.
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| Tom | 29 Jun 2006 22:08 |
Hi All-
I have an 87 Honda civic 4 door sedan 5-speed that has been sitting at my brothers place for at least 6 years now. It broke the camshaft due to low oil (completely my fault) and wasted the camshaft journals in the head. I bought an 87 head from a junk yard - D15A2 - and had a valve job done on it. I was in the process of re-installing the head this week when I noticed something I was not aware of. I was checking the engine block ID and noticed it is an EW1 block - NOT a D15A2 which shows on the engine tag just above and to the left of the radiator. It seems someone had replace the original engine with an older EW1 engine before I bought the car. I have finished installing the head and connected Intake and exhaust manifolds, and all other devices needed. It starts right up and revs to approx 2500 RPM then immediately shuts down. If you "feather" the gas it will stay running (although very rough), and immediately dies if you let off the gas. I also get an occasional backfire.
I have checked all vaccum hoses and lines 3 or 4 times. I have blocked off all of the main manifold ports to eliminate manifold vacuum leaks. I have made sure the valves are adjusted correctly and that the camshaft pulley marks are where they should be at TDC. I just cant seem to pinpoint the problem.
I am now wondering if there is a difference in the heads between a EW1 and D15A2 engine that would explain my problem. I bought the D15A2 head and camshaft from an 87 manual transmission Civic - could there be a difference in camshaft specs between an EW1 and D15A2 engine. I am not sure what year the EW1 engine is from but I have the serial number in case there is a way to cross reference engine numbers to years.
Any ideas?
Tom
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