I have a post in the 4th gen section about the noises my engine has been making, so go there if you want to hear the sound clip. Anyway...
Went to get that horrible noise checked out today and the mechanic, who was very nice, and didnt at all seem out to rip me off, told me that my camshaft has slightly warped do to the excessive heat from the nitrous. No longer is the cam coming in perfect contact with the valves and that is the reason for all the extra noise. He asked if there were any aftermarket cams that I could get that would handle the excess heat... I told him I wasnt aware of any made for my h23 for nitrous/turboed engines.
So what is the deal with this happening? Have you ever heard of this before? Is it normal at all?
I can imagine what caused it, I ran a 65 shot twice within 10 minutes with just 1-step colder plugs and no ignition retard. The mechanic said that it could be worse and I can continue to drive on it until I get an aftermarket camshaft, but until then just don't spray as much (I dont think I will spray at all).
So what do I do now? Is this the perfect time for me to pick up a new set of those crower cams? (when i get the money). Or are those not for nitroused engines either?
the guy seemed pretty certain that it was a result of all of the heat from the nitrous. Yea, i would like to hear your opinions on it because this is the first time I have heard of this type of thing happening.
skunk2 makes h23 cams now. stage 2s, I would give them a try... also crower is coming out with some.
so weird tho...im running type-s cams and 60 shot no ignition retard and colder plugs and no problems whatso ever. Im doubting that the nos caused the warping. maybe the cam was faulty and you just never noticed it before the nos?!
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Last edited by dvsracergirl; 04-08-2004 at 06:47 PM.
well i know my engine was making a sound similar to it for quite some time, it just was never as bad. maybe the last times I used it caused it to worsen?
Think about this.
The valve extends into the combustion chamber...
it comes in contact with the engine oil, some seals, valvesprings a retainer, then the rocker arm. The rocker arm is mounted on shafts, and comes in contact with a film of oil that contacts the camshaft. Don't forget all the coolant running through the head.
I'm not gonna try and figure out if there is really a problem with the camshaft, there may or may not be, but if there is a problem with the cam, it surely is not due to the nitrous. Too many things between it and the valve to dissapate heat energy. I might buy it if he pulled off the valve cover and found it filled with burned oil deposits, but then you'd have problems beyond just the cam.
what the mechanic said is that everything looked great, except for the camshaft in one area (he didnt specify what cam he was talking about though). He said that there was one space on the cam that was no longer dull looking, instead it was all shiny, which means something... i dont remember what he said
Another thing that comes to mind is that I just got my oil changed the day before I went to the mechanic... I was at 3300 miles since my last change and in that 3300 miles I sprayed about a whole tank on my engine. I checked the oil at about 3000 miles and it was pretty black, then I made an appointment, and 300 miles later I got it changed.
On a seperate note, if you spray a whole 10# in that short of a time, I may consider changing my oil a little sooner just due to all the extra heat its taking on
just a thought but maybe the valves werent lashed correctly. this could also add something to the problem youre having. Its hard to pin point the exact thing that caused it to happen. maybe it was a faulty cam and the series of other things. Be happy that you didnt do much more damage.
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hey i have a set of stock cams you can have for cheap if you want to try em for the time being. ive also got an empty head if youd like that along with it..
since im going this far i may as well tell you i also have a stock h23 intake mani ill sell you with it as well. all of that for 75 shipped. message me on aim if you are interested.
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I will go as far as saying that the cam is not warped or melted. Ask him where the shiney spot is.
It may be a flat lobe, but I have NEVER heard of a Honda cam warping. I HAVE heard of a Skunk2 cam snapping in half upon installing it, but nothing like this.
The nitrous would not have warped a cam, anyways.
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i'm not an expert on this topic but by the look and feel of the steel cams are made from it would seem very difficult to warp or bend the cams, breaking the cams is a totally different story
So he's saying that only one of the lobe is out of round? And not the entire camshaft itself? I'm going to venture to say that your mechanic probably has no idea what he's talking about. Why?
1) I personally ran a 100 shot for over a year with no problems. Even with the stock exhaust/header for the first 4 months.
2) If there was enough heat to warp ONE cam lobe, don't you think the HEAD would warp first since it's the first component to be in contact with the combustion chamber? Or even the valve first?
It is definitely something in the valve train that's causing excessive wear on that ONE lobe. Maybe a bent valve?
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