desjardins.paacal
New Member
Assuming all else fails in my diagnostics and fixes IF i have to do a valve job because of cyl 6 misfires (unlikely at the time but trying to plan ahead for this scenario) ai suggested its possible to remove the front head with the engine still in place. Knowing ai notoriously makes some pretty wild mistakes i figured id ask the guys who've been down this road.
Granted this a high km engine (near 250k) previous owner had just replaced turbos and a full overhaul would be ideal but considering the amount of time that takes im looking at every other option.
So far the hpfp was failing and im about to swap all that. No issues with spark (switched plugs and cop with diff cylinder no change). Previous owner had done a wet compression test indicating some valve leakage on cyl 6. Ive since bore scoped cyl 5 and 6 in case of obvious damage (seems decent but filthy). Since the car sat for 2 3 years i drained the fuel tank and did a fuel system clean. That ended the hpfp
did a quick test drive was happy to see rail pressure go from 200psi idle 800psi load to a whopping 2100psi! Only to see the foam insulator under the hood covered in gasoline and a couple gallons of gas under the car.
So the plan so far:
Replace the hpfp cam follower and hp line. Perform oil change
Re evaluate misfires as cyl 6 is dead last in the fuel rail and the low pressure likely couldnt properly atomize fuel. (Recheck dtcs look at misfire count)
Pop off the intake manifold and manually clean intake valves (needed either way car had no catch can or wmi and i doubt the owner religiously maintained the intake valves)
Spirited test drive hoping to dislodge any missed carbon on valves/seats (who knows why previous owner swapped turbos)
At that point on the mechanical side of things i dont see many options. Injector possibly? Wiring?
Could probably do like the plugs and coils and swap 5 and 6 to complerely isolate that portion.
After that sounds like pop the head off to me?
Ai suggests doing the front head in place and while im in there do water pump oil pump timing chain and tensioners to save the whole engine removal and reinstallation.
Open to suggestions and recommendations just brainstorming here and trying to plan ahead.
Theres always the option of a junkyard ecoboost but seems like a lot of work to possibly end up with just as much or more problems.
Sent from my SM-S928W using Tapatalk
Granted this a high km engine (near 250k) previous owner had just replaced turbos and a full overhaul would be ideal but considering the amount of time that takes im looking at every other option.
So far the hpfp was failing and im about to swap all that. No issues with spark (switched plugs and cop with diff cylinder no change). Previous owner had done a wet compression test indicating some valve leakage on cyl 6. Ive since bore scoped cyl 5 and 6 in case of obvious damage (seems decent but filthy). Since the car sat for 2 3 years i drained the fuel tank and did a fuel system clean. That ended the hpfp
did a quick test drive was happy to see rail pressure go from 200psi idle 800psi load to a whopping 2100psi! Only to see the foam insulator under the hood covered in gasoline and a couple gallons of gas under the car.So the plan so far:
Replace the hpfp cam follower and hp line. Perform oil change
Re evaluate misfires as cyl 6 is dead last in the fuel rail and the low pressure likely couldnt properly atomize fuel. (Recheck dtcs look at misfire count)
Pop off the intake manifold and manually clean intake valves (needed either way car had no catch can or wmi and i doubt the owner religiously maintained the intake valves)
Spirited test drive hoping to dislodge any missed carbon on valves/seats (who knows why previous owner swapped turbos)
At that point on the mechanical side of things i dont see many options. Injector possibly? Wiring?
Could probably do like the plugs and coils and swap 5 and 6 to complerely isolate that portion.
After that sounds like pop the head off to me?
Ai suggests doing the front head in place and while im in there do water pump oil pump timing chain and tensioners to save the whole engine removal and reinstallation.
Open to suggestions and recommendations just brainstorming here and trying to plan ahead.
Theres always the option of a junkyard ecoboost but seems like a lot of work to possibly end up with just as much or more problems.
Sent from my SM-S928W using Tapatalk
