Hello everyone, i have a 1990 Honda Accord EX 2.2L F22A1. So, i just recently replaced my Valve Seals because i had an oil burning problem, and even after replacing the seals, i still have a burning problem, plus if i drive any faster than 60mph, blue smoke starts entering inside the cabin.. any idea what else it could be, head gasket is new as well.. bummed..

 

How many miles? Has the PCV system been serviced lately? Clogged PCV system will cause blue smoke. It could also be worn piston rings. Compression and leak down tests would rule that out anyway.

I think the first thing to do would be to identify how the smoke is entering the cabin. If it's entering from the engine compartment then you likely have an exhaust leak somewhere. It's not healthy to be breathing that stuff in.

 

186k miles.
And yes PCV system has been replaced very recently.
I had also replaced the valve seals thinking that was the problem, but it did not fix it.
And I can't truly tell where the smoke is coming from, all I know is once I pass 60-62mph and hold it at that constant speed or higher, the smoke starts appearing, I don't know if it's coming through the vents or somewhere else.

 

If you have smoke getting into the cabin, there most likely is an exhaust leak, or a massive oil leak that gets onto the exhaust, which is then sucked into the vents via the cowl inlet.

 

Most likely exhaust leak then..
Because i have no visible oil leak anywhere..
Where would the main points to look be?

And just slightly off topic...
Near the tops of the cylinders if they have ridges in them, that indicates ring wear correct?
Which would explain my burning oil still?
(since I replaced my valve seals to no avail)

 

Pull the heat shield off the exhaust manifold(header) EX manifolds tend to split on the #1 primary, Unlike the DX/LX models that use a 4>1 manifold, the EX uses a 4>2 'tubular' cast manifold that will eventually crack. Dorman even makes a very heavy duty replacement unit for EX cars as it is fairly common on 90-97 EXs. Not sure about 98-02s, but probably the same.
If no crack there, check your down tube flex joint. The external braidng is for protection, internal is to maintain smooth flow, the pipe itself is corrugated when stripped of the braided covers. If the pipe itself has failed the braiding is not gas tight. Also check the connection before the catalyst.

If you have actual ridges in the cylinders, and not just carbon buildup, then the cylinders are indeed worn and depending on how worn, needs to be bored over, sleeved, or the block replaced. This much wear would allow oil to get past the rings and into the combustion chamber/exhaust.

Have you done a compression check yet?

 

I have an aftermarket exhaust 4-2-1, but I do know that the braid on my flex pipe has a few strands that have ripped from being too low, plus I have no catalytic converter.

And I'm pretty sure they're ridges, the crown on my first cylinder had carbon deposits that were like rocks, lol. Ive cleaned them off twice already, anyways, the cylinder tops looked scuffed, not as smooth as the rest of the cylinder lining (which was extremely smooth).

And I did a while ago, 3 cylinders ran 105, 95, 100, but my first cylinder ran 50-55 PSI, ended up being due to an exhaust valve that had the wrong valve clearance so it never sat properly, and eventually that valve chipped and broke off, but I restored the head and have not done a compression test since.