When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I will be replacing my valve springs soon. I am going to hook up my compressor with 150 psi, to the spark plug hole. Has anybody ever had a valve drop into the cylinder using that much pressure?
Thank you. Did you keep the piston at, top dead center?
I did not because it depends on what type of "keeper" release tool you are using. I used a spring compressor that does not place any load on the retainer or the valve , I did not spin the crank at all using this type as I was confident that the air would hold up the valve and it was much easier because I did not have to bring each piston up to TDC , See below
But some of the others are like a lever that push down on the top of retainer to release the keepers , if you are using one of those I would spin the crank if you are worried about dropping a valve
I have 20,000 on my new engine so i am probably going to be doing the same soon
once you put air into the cylinder it is going to push the piston to the bottom it wont matter if it starts at tdc just dont loose air pressure or the valve will drop
once you put air into the cylinder it is going to push the piston to the bottom it wont matter if it starts at tdc just dont loose air pressure or the valve will drop
It's important to keep constant air in the cylinder while changing the springs...!!! If it makes you feel more comfortable, you can definitely put the pistons at Top Dead Center, however it's not necessary. I've done it many times over the past 25 years.
Valve spring replacement.
