4.0L compression test

[Bobolink]

Well, whadaya think? First check of compression in 5-6 years. '90 Renix 254277 miles. 1 through 6 respectively: 137½, 137½,144,152½, 145, & 151.

Not too bad, but 1&2 might have a slight gasket leak, huh? Anyone think the head needs pulling at this point? Everything is well within limits, as far as I know. No real problems, but I checked it because it seemed to have a slightly lean "chug" to it... not bad enough to call a lean miss, just something that after living with the truck for 24 years, just seems a little "off," like a valve isn't quite sealing or something.

[Linebacker]

I don't think I'd pull the head yet, but if you do, might as well go Full Monte.  Your guess of some leaky valves is probably correct.  Good luck!