Seals question: switching to synthetic oil

[evol90accord]

What seals would be a good idea to replace if switching from regular oil to synthetic? I'm doing my timing belt now, so I've replaced the cam shaft seal, balance shaft seal, oil pump seal, main crank seal, and valve cover gasket. I'll also be changing the oil pan gasket. The spark plug tube seals have already been replaced, as well as the spark plug grommets. What am I missing?

I have 170000K miles on this engine and its not burning oil as far as I can tell. It does lose some oil from leaking, but that was the oil pump seal which has been replaced.

[evol90accord]

Cool. I was going to try 5W-30 synthetic. I heard the lighter weights get up into camshaft and valves better to reduce chatter (I currently have 10W-30 regular oil). I've been wanting to switch to synthetic for a while, but all these horror stories of leaking seals and seizing engines kinda freaked me out. I figured since I'm changing everything that could leak now would be a good time to switch!

[mrhonda]

Sounds like You've got 'em all covered to me. Just don't forget the balancer seal retainer.

[accordaffair]

I switched without changing any seals, no probs for me (engine had about 100k)

[jhondayaaj]

Rear main, but I'd hesitate to yank the trans just to do that.

I'm running 0w-30 synthetic, no leaking seals.

0w-30?????????damn!!!!!!!!!!! i think that is too light for your motor, don't you think?? civic hybrid uses 0w20.

[mrhonda]

I don't run anything other than 5W-30, but hey, thats me.

[accordztech]

0w-30?????????damn!!!!!!!!!!! i think that is too light for your motor, don't you think?? civic hybrid uses 0w20.

0w is just the viscosity of the oil, in which the temp that it can handle the lowest....

30 is the weight you usually go for.

[TypeG]

i use mobile 1 and have always had little leaks.
can't say they have gotten any worse. i also read
about synthetic eating at your seals and thought it
was bull, but i have a leaky distributor and when i take the cap
off to clean up oil i saw where the oil had eaten the seal
between cap and dist. i now believe it

[ZigenBallZ]

I switched to castrol syntec blended and it actually reduced some leaks and issues I'd been having...

Synthetic blend is good schtuff...


but if you're gonna replace seals just to switch I wouldn't bother... leaks will always spring out from the one you don't replace... unless you replace them all... which seems like a whole lot of work just to switch oils...

Try it and see if it blows smoke or leaks... if it does switch back and consider replacing the seals then...

you have a bunch to think about... balancer shaft seals, rear and front mains... valve stem seals... cam seals...

[evol90accord]

but if you're gonna replace seals just to switch I wouldn't bother... leaks will always spring out from the one you don't replace... unless you replace them all... which seems like a whole lot of work just to switch oils...

you have a bunch to think about... balancer shaft seals, rear and front mains... valve stem seals... cam seals...

Did you actually read my post? I said I was replacing seals because I'm in the middle of a timing belt change. I asked if there were any that I'm missing that need to be replaced if I switched...

Everyone else thanks for the replies. I'm also changing the distributor seal as well now, because the plastic housing that holds the rotor has a huge hole in it where some plastic just broke out. Arizona heat kills rubber and plastic components on these cars...

[ZigenBallZ]

Did you actually read my post? I said I was replacing seals because I'm in the middle of a timing belt change. I asked if there were any that I'm missing that need to be replaced if I switched...

No need to be snotty about it...

I was just saying if you're going to replace one you might as well replace all of them...because the one to give you problems will be the one that you didn't replace...

[evol90accord]

No need for you to get all butthurt, either. I'm asking which one's I missed that would cause me problems. No biggie tho. If anything leaks it'll just give me another excuse to tear into the car. Lets face it, its all I live for on the weekends!

[ZigenBallZ]

No need for you to get all butthurt, either. I'm asking which one's I missed that would cause me problems. No biggie tho. If anything leaks it'll just give me another excuse to tear into the car. Lets face it, its all I live for on the weekends!

Ok now you're just being a dick...

the main seals, balancer seals and the valvestem seals are going to be the main points if there are problems...