Manifolds

fpawn1 · Post by **fpawn1** » Sat May 01, 2010 6:35 pm

It seem one manifold is hoter than the other---gauge on station reads fine---manifolds and elbows were replaced 2 yrs ago--no more than 50 hours.

Any ideas

ready123 · Post by **ready123** » Sat May 01, 2010 9:16 pm

Get a temp gun (infrared) and check to see how much hotter.... no two engines are exactly the same. You may not have a problem.

Big D · Post by **Big D** » Sat May 01, 2010 11:44 pm

I agree with the temp gun. It's also important to note that it's not uncommon for one manifold to run hotter than the other. On Mercs for example (those black engines!), port side usually runs hotter (with front of engine facing the bow, it's a porting and flow thing). How much hotter than the other will determine if further investigation is needed.

A simple test if you don't have a gun is to put a hand on each elbow soon after you start the engine. Be careful, it may be very hot. Don't do this with stainless exhaust, and be careful of moving parts or shut the engine off after reaching operating temp. You should be able to tell if one side is running much hotter. If it is, it may be a cooling or mechanical issue.

Hope this helps.