DIY Dad: if it has things, I'll tinker with it
Join Date: Jun 2011
Location: City Different
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1133 Post(s)
Thanked 352 Times in 313 Posts
iTrader Score: 0 reviews
Is this a 4 or 6 cylinder engine?
You need to address the misfire - not so much the compression issue if the compression is not way out of whack. He should have ran compression on all cylinders and recorded their readings. Can you post those?
It is possible to replace the valve seals (which would be the issue with the compression IF that is causing it) with the engine in the vehicle. At that mileage it is not crazy to think the valve seals could use replacing. And like Vang states above a rebuild around 300k is not out of place. Folks are running their engines at over 400k with the original goodies - just depends.
A 4 cylinder engine is pretty easy to pull and replace. The majority of the cost you would encounter for something like this would be to pull and replace the engine. Once out, the rebuild is hundreds of dollars worth of parts, if there is no issue with the integrity of the block and all that. But I would not worry about it right now if it is running OK. Get the source of the misfire identified.
You can swap coils and see if the misfire moves to the location of the swapped coil. If so the coil is the problem. But it may be the seal.
Let's say you do need to replace the valve seals. If it were me, and the vehicle works and you want to keep it, I would rebuild. The shop may want to take out the engine, and if so then there is not a good reason NOT to rebuild at that point: new piston rings (probably new pistons), racers and all that, new engine seals, new head gasket, oil pump checked and repaired/replaced, all kinds of things. Money is the thing that makes it hard. If you can pull the engine and place it yourself you will save thousands of dollars.
If the seals are bad, shop around for a place that will put new seals in with the engine in the truck - that is your least cost alternative. If all will only do it if they pull it, then seriously consider a rebuild. Shop around for a rebuilt. I bought a rebuilt engine for my Camry for $1,800 delivered. Been working perfectly.
'15 4Runner SR5 (1GR-FE)
'09 Camry SE 2.4L (2AZ-FE)
'97 Tacoma XL 4x4 Ext Cab 2.7L (3RZ-FE) - Manual
'97 Ford Explorer XLT V6 SOHC 4.0L 4x4