Slant Six Forum :: 170 backfires on one cylinder only

It is a solid lifter- nothing to "break" really. . If lifter shows wear on the bottom then the cam and lifters need to be replaced.

My opinion for what it is worth. Just pull the engine if it needs the cam replaced. By the time you mess with the grill, valance and struggle with the in car change, and then have a bad oil leak up front, it isn't worth it. If you have a oil leak, then you get to do it all over again. Plus doing a cam degreeing in the car can't be fun.

Just my 2 cents

Author:	argoschnei [ Sat Aug 19, 2023 10:01 am ]
Post subject:	Re: 170 backfires on one cylinder only
I was afraid of option 2. I dont think it is stuck in the up position (but I will double check). Can I replace the cam shaft and lifter without pulling the engine>?

Author:	Dart270 [ Sat Aug 19, 2023 12:11 pm ]
Post subject:	Re: 170 backfires on one cylinder only
You can but you'll need to pull the front bumper and/or the front valance panel. Also, some finesse and RTV is needed when putting the timing cover back on with the existing front oilpan gasket piece. Try not to remove that from the oilpan/engine block when pulling the timing cover. Probably someone did not break in your cam properly. Lou

Author:	argoschnei [ Sat Aug 19, 2023 12:45 pm ]
Post subject:	Re: 170 backfires on one cylinder only
How can I tell if it isnt the cam shaft and just a broken lifter. Is that even possible?? Can I remove the lifter itself w.o. removing the head?

Author:	argoschnei [ Sat Aug 19, 2023 12:54 pm ]
Post subject:	Re: 170 backfires on one cylinder only
How can I tell if it the camshaft or a broken lifter? Can I remove the lifter w.o. removing the head?

Author:	Dart270 [ Sat Aug 19, 2023 3:30 pm ]
Post subject:	Re: 170 backfires on one cylinder only
Assuming this is a pre-75 head with the drool tubes and open lifter/pushrod valley, you can reach down with a strong magnetic pickup tool and pull the lifter out. You can de-adjust the rocker adjuster screw all the way to get the pushrod out and out of the way. Lou

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170 backfires on one cylinder only https://mail.slantsix.org/forum/viewtopic.php?t=67377	Page 2 of 2

Author:	Rick Covalt [ Sun Aug 20, 2023 5:11 am ]
Post subject:	Re: 170 backfires on one cylinder only
It is a solid lifter- nothing to "break" really. . If lifter shows wear on the bottom then the cam and lifters need to be replaced. My opinion for what it is worth. Just pull the engine if it needs the cam replaced. By the time you mess with the grill, valance and struggle with the in car change, and then have a bad oil leak up front, it isn't worth it. If you have a oil leak, then you get to do it all over again. Plus doing a cam degreeing in the car can't be fun. Just my 2 cents

Author:	Charrlie_S [ Sun Aug 20, 2023 5:24 am ]
Post subject:	Re: 170 backfires on one cylinder only
Quote: It is a solid lifter- nothing to "break" really. . If lifter shows wear on the bottom then the cam and lifters need to be replaced. My opinion for what it is worth. Just pull the engine if it needs the cam replaced. By the time you mess with the grill, valance and struggle with the in car change, and then have a bad oil leak up front, it isn't worth it. If you have a oil leak, then you get to do it all over again. Plus doing a cam degreeing in the car can't be fun. Just my 2 cents Now 4 cents worth, when adding my 2 cents

Author:	argoschnei [ Sun Aug 20, 2023 6:00 am ]
Post subject:	Re: 170 backfires on one cylinder only
thanks for you two cents. I agree. It is above my pay grade as a shade tree mechanic. I probably will have to pay someone to do it. More or less, how much should it cost to have someone do it for me? (a lot more than two cents, I am guessing).

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