How to lap Briggs and Stratton engine valves (PART 2)

[Jodbronson]

Hi Good Job on the Vids.... Here is a TIP about them SPRINGS... Best is to push the Spring together... Then have Wires and TIE them, one on each side / opposite so they don't Spring back. Since they are compressed now...Once you aligned them with that washer. CUT the Wire and the SPRING will Spring back, you don't have to use a Screw Drivers. Quick and Easy... Take 3 Seconds most !!!!

Got questions... Ask me !!!

[dangerousdrdan]

Dave, Thanks so much for putting it out there! Very. VEry VERy,VERY useful. Another way to compress the spring is with two zip ties. One at the 12:00 position and the other at the 6:00 position. After the tappet is in place on the valve, just cut the zip ties and you're in business! This was a great video.

[gpzDave]

@dangerousdrdan Hey thanks! :)

[themidnightdaylight]

so that's where the valves are on a flat-head motor... I was wondering how the heck these little B&S motors worked... was starting to think it was magic :P good video :)

[gpzDave]

@themidnightdaylight Thanks, they are pretty cool little engines :)

[Rarrin9378]

ITALY, FRANCE.

[Z22ZINFS]

You forgot a major step! For proper valve timing, after lapping valves you must grind a small amount off the end of the valve stem until the distance between the vavle and the push rod is within specs. A feeler gage is required to obtain the proper distance. Without checking the valve gap after lapping, the valve timing will be retarded, resulting in less compression and horse power.

[seapeddler]

@Z22ZINFS Good point. Now, what is the maximum allowable stem to guide clearance?

[IFish4Tuna]

@Z22ZINFS

This was a great instruction video. Question to Z22ZINFS

Do you mean the rod undernead where the washer attaches? Is that specification normally about .004 inch or .003 inch? Do you do that before re-attaching the springs/washers?

[swabbster3]

i did a valve job on a 1958 briggs and the valves were held in with a pin

[KNARF1]

Good Job...! From Kingston Washington, USA Very helpful using the basic tools...

[gpzDave]

@KNARF1 Thank you my friend! I'm glad it helped you. :)

[CRONULLAPOINTPL]

cable ties to use i was lucky had these mini type ones took a few as they broke , need to twist them on in a position equal to compress it down, i had no fiddling only one minute , i had to turn camshaft to play around with tension to sit them flat and slip out ties after i used my very small snips, i know it works did it again today love your accent and videos i love my briggs 3.5

[CRONULLAPOINTPL]

i used cable ties x 3 to hold the spring in a compressed position, the last bit is sni em off, it worked took 5 mins, i will use this method from now, the exhaust was the bigger one on mine the intake i did without the ties,

[gpzDave]

@CRONULLAPOINTPL That's a very good idea, I will use that in future thanks for letting me know about that. :)

[snaponjohn100]

Btw, cool accent and I think ur cute:)

[snaponjohn100]

Hey it's snaponjohn100's daughter. Cool vid:)

[zappulmo]

Thanks for the info, My ride on mower motor popped its intake valve seat and I have to replace it.

[gpzDave]

@zappulmo No problem mate, I hope you get your mower sorted.

[zappulmo]

@gpzDave Yep, lapped it last night, wasn't sure If I was doing it right, but it started and ran well this morning when I put the ride-on mower all back together again.

Mowed half the lawn before the rain started and had to stop.

Thank you for your informative video

All the best

[gpzDave]

@zappulmo You're welcome; and well done for doing it yourself, it would have cost a lot to get a shop to do it.

[snaponjohn100]

Loved this series. Made it look easy. ( except the valve removal & install ). Lol. I bought the valve spring compressor tool. Check out donyboy73. He does a great job showing how to use one. ( it's pretty cool having a friend across the ocean in Scotland ). :-)

[gpzDave]

@snaponjohn100 And its cool having a friend in the US! I will need to buy a valve spring compressor, it took me 1.5 hours to get the darn things back on!

[southerngardener79]

@gpzDave He have you thought about a brake caliper compressor. The kind that I'm thinking of is the scissor type.

[gpzDave]

@southerngardener79 Hi! Yeah that could work, if you could get it to fit into the recess where the valve springs are located then it might work. Although a proper valve spring compressor is the best way, I might use the method posted below in the comments by "CRONULLAPOINTPL" on the cable ties, it's a good idea that is inexpensive.

Take care, Dave.

[Tmodeen1]

how long did it take

[gpzDave]

@Tmodeen1 Hi, if I had a valve spring compressor it would have been quicker, but the way I did it, you can do it in an afternoon (or a bit longer if you've never done it before)

Cheers, Dave.