Heated man­i­fold

Car Mechanics (UK) - - Tales From The Workshop -

The in­let man­i­fold on this 2006 Fiat Panda was not de­signed to be heated, but luck­ily the ex­pe­ri­ence didn’t con­sign the unit to the scrapheap. The Fiat had been brought in due to rough run­ning and, when lis­ten­ing to the note from the en­gine, we sus­pected this was due to an air leak. A quick spray around the man­i­fold with a sol­vent while the en­gine was run­ning con­firmed this by rais­ing the revs slightly.

When we re­moved the plas­tic man­i­fold, it was dis­cov­ered that the en­gine had over­heated at some stage and this had re­sulted in the man­i­fold soft­en­ing and the rub­ber gas­kets har­den­ing. As the man­i­fold is not dif­fi­cult to re­move and re­fit, we de­cided to try fit­ting new gas­kets to see if they would cre­ate a good enough seal. For­tu­nately, this rec­ti­fied the run­ning prob­lems. As a pre­cau­tion we checked the cool­ing sys­tem, but with no faults present we re­turned the ve­hi­cle to its owner with a note to watch the tem­per­a­ture gauge more closely.

The plas­tic man­i­fold had sus­tained heat dam­age on the join­ing face to the cylin­der­head.

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