Still glowing...
#1
Registered User
Thread Starter
Join Date: Oct 2010
Location: VT
Posts: 93
Likes: 0
Received 0 Likes
on
0 Posts
Still glowing...
Ok, trying to figure some things out. Rig is a 87 4Runner, previous owner toasted motor. Blew HG, cracked head, melted thermo, and trashed a piston.
Replaced head, piston, and thermo to get back on road. Drained and flushed coolant system several times and replaced freeze plugs. Also put in new plugs, wires and o2 sensor. Dropped cat and checked it and can see through it.
Drove awhile with no cold start sensor, eventually replaced that. Blew out manifold exhaust and down pipe gaskets, drove for while like that then replaced.
What im trying to figure out is the reason for the glowing manifold. I figured it was caused by the exhuast leaks, but the repairs did nothing. The motor gets hot sometimes too, sometimes normal driving with cause temp guage to climb high but will drop down. Also noticed before going up alot of hills, the manifold glows some but when getting to the top its really bright. Any ideas? There is a slight coolant leak, so some air is getting into system, not sure if that could cause it.
Replaced head, piston, and thermo to get back on road. Drained and flushed coolant system several times and replaced freeze plugs. Also put in new plugs, wires and o2 sensor. Dropped cat and checked it and can see through it.
Drove awhile with no cold start sensor, eventually replaced that. Blew out manifold exhaust and down pipe gaskets, drove for while like that then replaced.
What im trying to figure out is the reason for the glowing manifold. I figured it was caused by the exhuast leaks, but the repairs did nothing. The motor gets hot sometimes too, sometimes normal driving with cause temp guage to climb high but will drop down. Also noticed before going up alot of hills, the manifold glows some but when getting to the top its really bright. Any ideas? There is a slight coolant leak, so some air is getting into system, not sure if that could cause it.
#3
Registered User
Join Date: Nov 2012
Location: Auburn WA
Posts: 40
Likes: 0
Received 0 Likes
on
0 Posts
This sounds like a lean condition to me. Check for vacuum leaks and whatever else you think of that would cause a lean condition. Was your truck idling high when you got it running after the rebuild then you turned down the idle screw or retarded the timing or anything? Is the engine otherwise performing well?
Also is the whole manifold glowing or just 1 hole?
Also is the whole manifold glowing or just 1 hole?
#5
Registered User
Thread Starter
Join Date: Oct 2010
Location: VT
Posts: 93
Likes: 0
Received 0 Likes
on
0 Posts
The whole manifold glows red hot.
I adjusted idle screw down when motor was idling really high from exhuast leaks. Have since adjusted it.
Would be good thing to check timing.
Motor runs good, gets hot while driving somtimes.
I adjusted idle screw down when motor was idling really high from exhuast leaks. Have since adjusted it.
Would be good thing to check timing.
Motor runs good, gets hot while driving somtimes.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post