Hunter79764
Full Access Member
- Joined
- Sep 1, 2021
- Posts
- 344
- Reaction score
- 532
- Location
- Grand Prairie, TX
- First Name
- Shawn
- Truck Year
- 1987
- Truck Model
- Suburban V20
- Engine Size
- 350
This isn't in a square, but my wife's daily, 2013 Yukon Denali XL with the 6.2 and a Texas Speed VVT Stage 2 cam (installed with a DOD delete ~4 years ago) is giving me some problems. The long Version:
A year ago, I got a P219B code (A/F imbalance, Bank 2) and valvetrain noise. Pulled the valve cover on bank 2 and saw a factory rocker was trashed, not surprising with the stiff springs and cam, so I replaced them all with a set of Summit's upgraded trunnion rockers. Pushrods and everything else was fine.
Last month, I get a P219A (Bank 1 A/F imbalance), I pull the bank 1 cover, cylinder 7 exhaust rocker was trashed. Scratched my head a little, then got another under warranty at Summit, installed it and everything was fine.
Yesterday, I'm driving home, 2 blocks away it feels funny and almost stalls at a light. It cleared up when I took off, then felt funny again as I rolled up to my house, at the same time, got a flashing check engine code, P219A... Started it to see if I heard anything, ran rough, then heard a bit of a scraping noise and turned it off. Pulled valve cover on Bank 1 tonight, valves seemed to all be lifting properly (as much as I could measure with a machinist's ruler), pulled all rockers, all turned free etc., pushrods straight, rotated engine and lifters seemed to hold in their trays.
Tried running it as a 4 then a 6 cylinder (by removing pushrods and letting lifters stay up in the tray) to see if I could hear the scraping noise without pressure on the cam (thinking I might have a lifter rotated in a broken tray and/or a wiped out cam lobe). It ran, but rough, and I couldn't tell one way or the other, I just knew it was all kinds of wrong.
I'm probably at the point that I just need to tear it down, pull the heads, inspect lifters and cam, etc., unless someone has better ideas. That's the advice part.
The next part, who should I be getting lifter trays and lifters from? What about head gaskets? I live 20 minutes from Summit Racing, and Amazon gets me parts about as quick as that so I prefer those if possible. I need to watch my money, but I am in NO WAY wanting to do this again. GM OEM parts and gaskets? Fel Pro? Summit brand?
Thanks in advance.
A year ago, I got a P219B code (A/F imbalance, Bank 2) and valvetrain noise. Pulled the valve cover on bank 2 and saw a factory rocker was trashed, not surprising with the stiff springs and cam, so I replaced them all with a set of Summit's upgraded trunnion rockers. Pushrods and everything else was fine.
Last month, I get a P219A (Bank 1 A/F imbalance), I pull the bank 1 cover, cylinder 7 exhaust rocker was trashed. Scratched my head a little, then got another under warranty at Summit, installed it and everything was fine.
Yesterday, I'm driving home, 2 blocks away it feels funny and almost stalls at a light. It cleared up when I took off, then felt funny again as I rolled up to my house, at the same time, got a flashing check engine code, P219A... Started it to see if I heard anything, ran rough, then heard a bit of a scraping noise and turned it off. Pulled valve cover on Bank 1 tonight, valves seemed to all be lifting properly (as much as I could measure with a machinist's ruler), pulled all rockers, all turned free etc., pushrods straight, rotated engine and lifters seemed to hold in their trays.
Tried running it as a 4 then a 6 cylinder (by removing pushrods and letting lifters stay up in the tray) to see if I could hear the scraping noise without pressure on the cam (thinking I might have a lifter rotated in a broken tray and/or a wiped out cam lobe). It ran, but rough, and I couldn't tell one way or the other, I just knew it was all kinds of wrong.
I'm probably at the point that I just need to tear it down, pull the heads, inspect lifters and cam, etc., unless someone has better ideas. That's the advice part.
The next part, who should I be getting lifter trays and lifters from? What about head gaskets? I live 20 minutes from Summit Racing, and Amazon gets me parts about as quick as that so I prefer those if possible. I need to watch my money, but I am in NO WAY wanting to do this again. GM OEM parts and gaskets? Fel Pro? Summit brand?
Thanks in advance.