Why You Should Always Check Piston to Valve Clearance
Автокөліктер мен көлік құралдары
To avoid wrecking your engine you should always check piston to valve clearance when installing a new cam, rocker arms, or cylinder heads. Skipping this crucial step may seem like a time savings but could end up costing you thousands of dollars and requiring a completely new engine.
In this video we install a TFS Stage 1 camshaft and Flo Tek 180cc aluminum cylinder heads on a 1986 302 SBF in my 1964 Mercury Comet. The 1986 pistons are especially suspect due to the lack of valve reliefs so skipping this step isn't even an option.
I will show you the specific tools required whether you intended to use clay or a dial indicator. We talk about converting your hydraulic roller lifter to solid lifters, pushrod length, checker springs, and the complete measurement philosophy.
As an added bonus you get to see how to install a cam in a 302 SBF Windsor using basic hand tools at home!
Пікірлер: 15
Thank you for helping my son today. You were our literal guardian angel I was an hour and a half away from getting to him and the minute he called me you pulled up and saved the day! Thank you so so much. ❤❤❤
@truckandroll989
11 ай бұрын
So glad I could help! We’ve all been there before :). I was just happy my Old spare fit!
Have you thought of a stock h.o cam? Or was that what was in it? Good info👍🏼. have a low mile grand marquis 5.0 engine,was thinking of doing a similar build. Loving the project,Don’t scrap it…🤙🏼
@truckandroll989
Жыл бұрын
I just really wanted something with a bit of chop ya know. I know it is silly but wanted something that had a bit more of a hot rod feel
@ryanmcclendon3309
Жыл бұрын
@@truckandroll989 totally get it,and agree. 👍🏼
@truckandroll989
Жыл бұрын
@@ryanmcclendon3309 im over hear kicking around the idea of a B303 cam now lol…
I just watched one or your videos with your 1981 Chevy and it said that you have a t56 transmission on it and I was wondering does that just hook up to the big block or what adapter do you have on it?
@truckandroll989
Жыл бұрын
You have to buy a bell housing to allow it all to adapt. It doesnt bolt directly up. There are a handful of options depending on how much you want to spend and whether you need it SFI approved or not.
Instead of the 1.6 rocker ratio try a 1.5 should slow the rate the valve opens, ironic that you ended up with an 86' block. Cutting the pistons is an option and should hold up okay without nitrous ,but a huge pain in the back side... Or like you said put it back the way it was with a few add ons and enjoy it as a cool driver, maybe find another block and build it the way you want it at a later date and time winter project...
@truckandroll989
Жыл бұрын
Yea the issue is certainly the timing more-so than the lift. However I clayed it yesterday and the results were more promising. Im wondering if the check springs were giving me a false reading somehow.
@bluvettgmailcom
Жыл бұрын
@@truckandroll989 just curious but were you checking with an original push rod or the checker ? and the heavier springs will help take up slack better than the checker springs ,they probably wouldn't compress the assembly lube...
@truckandroll989
Жыл бұрын
@@bluvettgmailcom measured pushrod length first. Turns out a stock length pushrod gives you a really good contact patch on the tip of the valve
@bluvettgmailcom
Жыл бұрын
@@truckandroll989 looking forward to the next video showing what you found out... that and can't wait to hear it run with the upgrades on the dyno
@truckandroll989
Жыл бұрын
@@bluvettgmailcom so it appears i had clearance on the exhaust after all. First clay yielded about .125” but on the intake was tight. Couldn’t get a great read. Its 100F in my garage and play-doh wasnt playing nice. Hopefully I can try again and see. I may have to retard the cam and measure again… ooo the joy